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Home Return to list Fire Weather Warning 0038 Issued by the Cheyenne Forecast Office
Action: New Issued At: 2026-08-10 14:51:24 033 WWUS85 KCYS 101951 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 151 PM MDT Mon Aug 10 2026 WYZ417>427-111200- /O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ /O.CON.KCYS.FW.W.0037.000000T0000Z-260811T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 151 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND WIND GUSTS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 427. * WIND...West to northwest at 10 to 20 mph with gusts up to 35 mph. * HUMIDITY...Between 9 and 18 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ WYZ428>430-111200- /O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains- 151 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND GUSTY WINDS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 428, 429, AND 430... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zone 428.Fire weather zone 429.Fire weather zone 430. * WIND... Northerly winds 12 to 15 gusting 25 to 30 mph * HUMIDITY... 10 TO 20 PERCENT * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: New Issued At: 2026-08-10 14:51:24 033 WWUS85 KCYS 101951 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 151 PM MDT Mon Aug 10 2026 WYZ417>427-111200- /O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ /O.CON.KCYS.FW.W.0037.000000T0000Z-260811T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 151 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND WIND GUSTS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 427. * WIND...West to northwest at 10 to 20 mph with gusts up to 35 mph. * HUMIDITY...Between 9 and 18 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ WYZ428>430-111200- /O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains- 151 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND GUSTY WINDS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 428, 429, AND 430... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zone 428.Fire weather zone 429.Fire weather zone 430. * WIND... Northerly winds 12 to 15 gusting 25 to 30 mph * HUMIDITY... 10 TO 20 PERCENT * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-08-10 22:28:09 516 WWUS85 KCYS 110327 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 927 PM MDT Mon Aug 10 2026 WYZ417>427-120000- /O.EXP.KCYS.FW.W.0037.000000T0000Z-260811T0300Z/ /O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 927 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... ...RED FLAG WARNING HAS EXPIRED FOR LOW RH AND GUSTY WINDS MPH FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 427. * WIND...North to northwest at 15 to 20 mph with gusts up to 35 mph. * HUMIDITY...Between 9 and 16 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ WYZ428>430-120000- /O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains- 927 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND GUSTY WINDS FOR FIRE WEATHER ZONES 428, 429, AND 430... * AFFECTED AREA...Fire weather zone 428 to 430. * WIND... Northerly winds 10 to 15 gusting up to 30 mph. * HUMIDITY... 10 to 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-08-10 22:28:09 516 WWUS85 KCYS 110327 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 927 PM MDT Mon Aug 10 2026 WYZ417>427-120000- /O.EXP.KCYS.FW.W.0037.000000T0000Z-260811T0300Z/ /O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 927 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... ...RED FLAG WARNING HAS EXPIRED FOR LOW RH AND GUSTY WINDS MPH FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 427. * WIND...North to northwest at 15 to 20 mph with gusts up to 35 mph. * HUMIDITY...Between 9 and 16 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ WYZ428>430-120000- /O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains- 927 PM MDT Mon Aug 10 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR LOW RH AND GUSTY WINDS FOR FIRE WEATHER ZONES 428, 429, AND 430... * AFFECTED AREA...Fire weather zone 428 to 430. * WIND... Northerly winds 10 to 15 gusting up to 30 mph. * HUMIDITY... 10 to 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-08-11 02:09:14 731 WWUS85 KCYS 110708 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 108 AM MDT Tue Aug 11 2026 WYZ417>430-120300- /O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills-Southern Laramie Valley- Southern Laramie Range-Laramie Foothills and High Plains- 108 AM MDT Tue Aug 11 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, and 430... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 430. * WIND...West to northwest at 15 to 20 mph with gusts up to 35 mph, turning northerly into the evening hours. * HUMIDITY...Between 8 and 16 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||