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Home Return to list Fire Weather Warning 0022 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-08-10 03:24:15 927 WWUS85 KRIW 100823 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 223 AM MDT Mon Aug 10 2026 WYZ280-281-285-300-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Will have the best chances in zones 280, 289 and 300. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: There is a 20 to 30% chance for virga showers/dry thunderstorms between 1500 and 2000. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: New Issued At: 2026-08-10 03:24:15 927 WWUS85 KRIW 100823 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 223 AM MDT Mon Aug 10 2026 WYZ280-281-285-300-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Will have the best chances in zones 280, 289 and 300. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: There is a 20 to 30% chance for virga showers/dry thunderstorms between 1500 and 2000. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: New Issued At: 2026-08-10 03:24:15 927 WWUS85 KRIW 100823 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 223 AM MDT Mon Aug 10 2026 WYZ280-281-285-300-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Will have the best chances in zones 280, 289 and 300. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: There is a 20 to 30% chance for virga showers/dry thunderstorms between 1500 and 2000. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: New Issued At: 2026-08-10 03:24:15 927 WWUS85 KRIW 100823 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 223 AM MDT Mon Aug 10 2026 WYZ280-281-285-300-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Will have the best chances in zones 280, 289 and 300. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: There is a 20 to 30% chance for virga showers/dry thunderstorms between 1500 and 2000. Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-102200- /O.NEW.KRIW.FW.W.0022.260810T1800Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 223 AM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Wind gusts up to 55 mph will be possible from outflows. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-10 15:00:54 337 WWUS85 KRIW 102000 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 200 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110300- /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY...Fire Weather Zone 277. * COUNTIES AFFECTED: In Southwest WY...Uinta. In West Central WY...Lincoln. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-10 15:00:54 337 WWUS85 KRIW 102000 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 200 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110300- /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY...Fire Weather Zone 277. * COUNTIES AFFECTED: In Southwest WY...Uinta. In West Central WY...Lincoln. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-10 15:00:54 337 WWUS85 KRIW 102000 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 200 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110300- /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY...Fire Weather Zone 277. * COUNTIES AFFECTED: In Southwest WY...Uinta. In West Central WY...Lincoln. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-10 15:00:54 337 WWUS85 KRIW 102000 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 200 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110300- /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY...Fire Weather Zone 277. * COUNTIES AFFECTED: In Southwest WY...Uinta. In West Central WY...Lincoln. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-10 15:00:54 337 WWUS85 KRIW 102000 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 200 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the lower 90s; highs in the 80s in zones 285 and 300. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the middle 90s; Highs around 90 in zone 287. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Absaroka Mountains/North Shoshone NF- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-111300- /O.NEW.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Highs in the middle 80s to near 90 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110300- /O.CON.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 200 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Strong Gusty Winds...and Dry Thunderstorms with gusty and erratic outflow winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY...Fire Weather Zone 277. * COUNTIES AFFECTED: In Southwest WY...Uinta. In West Central WY...Lincoln. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: Lightning and outflow wind gusts to 60 mph will be possible through Monday afternoon. * HUMIDITY: As low as 15 percent. * TEMPERATURES: Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-10 21:55:08 679 WWUS85 KRIW 110254 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 854 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Lows around 60. Highs in the lower 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Lows around 60. Highs around 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Absaroka Mountains/North Shoshone NF- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Lows in the lower 50s. Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Lows in the mid 50s. Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110400- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have diminished and relative humidities have begun to increase in most locations across central and southern Wyoming, thus todays Red Flag Warning will be allowed to expire at 9PM. Relative humidity values will recover to the 30 to 60 percent range with light winds overnight. Red Flag Warnings will be in effect again for much of central and southern Wyoming from Noon to 9PM on Tuesday, August 11th. $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-10 21:55:08 679 WWUS85 KRIW 110254 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 854 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Lows around 60. Highs in the lower 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Lows around 60. Highs around 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Absaroka Mountains/North Shoshone NF- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Lows in the lower 50s. Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Lows in the mid 50s. Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110400- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have diminished and relative humidities have begun to increase in most locations across central and southern Wyoming, thus todays Red Flag Warning will be allowed to expire at 9PM. Relative humidity values will recover to the 30 to 60 percent range with light winds overnight. Red Flag Warnings will be in effect again for much of central and southern Wyoming from Noon to 9PM on Tuesday, August 11th. $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-10 21:55:08 679 WWUS85 KRIW 110254 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 854 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Lows around 60. Highs in the lower 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Lows around 60. Highs around 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Absaroka Mountains/North Shoshone NF- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Lows in the lower 50s. Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Lows in the mid 50s. Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110400- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have diminished and relative humidities have begun to increase in most locations across central and southern Wyoming, thus todays Red Flag Warning will be allowed to expire at 9PM. Relative humidity values will recover to the 30 to 60 percent range with light winds overnight. Red Flag Warnings will be in effect again for much of central and southern Wyoming from Noon to 9PM on Tuesday, August 11th. $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-10 21:55:08 679 WWUS85 KRIW 110254 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 854 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Lows around 60. Highs in the lower 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Lows around 60. Highs around 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Absaroka Mountains/North Shoshone NF- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Lows in the lower 50s. Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Lows in the mid 50s. Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110400- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have diminished and relative humidities have begun to increase in most locations across central and southern Wyoming, thus todays Red Flag Warning will be allowed to expire at 9PM. Relative humidity values will recover to the 30 to 60 percent range with light winds overnight. Red Flag Warnings will be in effect again for much of central and southern Wyoming from Noon to 9PM on Tuesday, August 11th. $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-10 21:55:08 679 WWUS85 KRIW 110254 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 854 PM MDT Mon Aug 10 2026 WYZ280-281-285-300-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Mountains-Casper Mountain- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...285...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Lows around 60. Highs in the lower 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ283-287-289-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...289. In North Central WY Fire Zone....287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs. In Southwest WY...Sweetwater. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Lows around 60. Highs around 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ286-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Absaroka Mountains/North Shoshone NF- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY...Fire Weather Zone 286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. * WIND: West 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Lows in the lower 50s. Highs in the upper 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ278-279-112100- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ /O.CON.KRIW.FW.W.0023.260811T1800Z-260812T0300Z/ Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zone....279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 14 percent. * TEMPERATURES: Lows in the mid 50s. Highs in the mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277-110400- /O.EXP.KRIW.FW.W.0022.000000T0000Z-260811T0300Z/ Lincoln and Uinta Counties/Lower Elevations- 854 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have diminished and relative humidities have begun to increase in most locations across central and southern Wyoming, thus todays Red Flag Warning will be allowed to expire at 9PM. Relative humidity values will recover to the 30 to 60 percent range with light winds overnight. Red Flag Warnings will be in effect again for much of central and southern Wyoming from Noon to 9PM on Tuesday, August 11th. $$ http://weather.gov/riverton | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||