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Home Return to list Fire Weather Warning 0036 Issued by the Cheyenne Forecast Office
Action: New Issued At: 2026-08-07 15:38:02 819 WWUS85 KCYS 072037 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 237 PM MDT Fri Aug 7 2026 WYZ420>422-425>427-081200- /O.NEW.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ /O.CON.KCYS.FW.W.0035.000000T0000Z-260808T0200Z/ North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 237 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... ...RED FLAG WARNING IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire weather zones 420 through 422 and fire weather zones 425 through 427. * WIND...During the daytime hours, west winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter southwest winds of 5 to 15 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 10 and 15 percent on Sunday. Overnight recoveries of 20 to 35 percent. * ADDITIONAL DETAILS...Isolated dry lightning and gusty and erratic winds associated with high based thunderstorms will be possible Saturday and Sunday afternoon and evening. * 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. && $$ WYZ417>419-423-424-428>433-081200- /O.NEW.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ 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- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains-Laramie East High Plains- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 237 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, AND 433... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire weather zone 417.Fire weather zone 418.Fire weather zone 419.Fire weather zone 423.Fire weather zone 424.Fire weather zone 428.Fire weather zone 429.Fire weather zone 430.Fire weather zone 431.Fire weather zone 432.Fire weather zone 433. * WIND...During the daytime hours, west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara, Goshen, and Eastern Laramie Counties. * ADDITIONAL DETAILS...Isolated dry lightning and gusty and erratic winds associated with high based thunderstorms will be possible Saturday and Sunday afternoon and evening. * 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: 2026-08-07 15:38:02 819 WWUS85 KCYS 072037 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 237 PM MDT Fri Aug 7 2026 WYZ420>422-425>427-081200- /O.NEW.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ /O.CON.KCYS.FW.W.0035.000000T0000Z-260808T0200Z/ North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 237 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... ...RED FLAG WARNING IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire weather zones 420 through 422 and fire weather zones 425 through 427. * WIND...During the daytime hours, west winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter southwest winds of 5 to 15 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 10 and 15 percent on Sunday. Overnight recoveries of 20 to 35 percent. * ADDITIONAL DETAILS...Isolated dry lightning and gusty and erratic winds associated with high based thunderstorms will be possible Saturday and Sunday afternoon and evening. * 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. && $$ WYZ417>419-423-424-428>433-081200- /O.NEW.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ 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- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains-Laramie East High Plains- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 237 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, AND 433... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire weather zone 417.Fire weather zone 418.Fire weather zone 419.Fire weather zone 423.Fire weather zone 424.Fire weather zone 428.Fire weather zone 429.Fire weather zone 430.Fire weather zone 431.Fire weather zone 432.Fire weather zone 433. * WIND...During the daytime hours, west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara, Goshen, and Eastern Laramie Counties. * ADDITIONAL DETAILS...Isolated dry lightning and gusty and erratic winds associated with high based thunderstorms will be possible Saturday and Sunday afternoon and evening. * 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: 2026-08-07 20:59:38 889 WWUS85 KCYS 080159 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 759 PM MDT Fri Aug 7 2026 WYZ420>422-425>427-081200- /O.EXP.KCYS.FW.W.0035.000000T0000Z-260808T0200Z/ /O.CON.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 759 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... * AFFECTED AREA...Fire weather zones 420 through 422 and fire weather zones 425 through 427. * WIND...During the daytime hours, west winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter southwest winds of 5 to 15 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Saturday, and between 10 and 15 percent on Sunday. Overnight recoveries of 20 to 35 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 both Saturday and Sunday. * 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. && $$ WYZ417>419-423-424-428>433-081200- /O.CON.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains-Laramie East High Plains- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 759 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, AND 433... * AFFECTED AREA...Fire weather zones 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, and 433. * WIND...During the daytime hours, west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara, Goshen, and Eastern Laramie Counties. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours both Saturday and Sunday. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-08-07 20:59:38 889 WWUS85 KCYS 080159 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 759 PM MDT Fri Aug 7 2026 WYZ420>422-425>427-081200- /O.EXP.KCYS.FW.W.0035.000000T0000Z-260808T0200Z/ /O.CON.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills- 759 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 420, 421, 422, 425, 426, AND 427... * AFFECTED AREA...Fire weather zones 420 through 422 and fire weather zones 425 through 427. * WIND...During the daytime hours, west winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter southwest winds of 5 to 15 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Saturday, and between 10 and 15 percent on Sunday. Overnight recoveries of 20 to 35 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 both Saturday and Sunday. * 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. && $$ WYZ417>419-423-424-428>433-081200- /O.CON.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains-Laramie East High Plains- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 759 PM MDT Fri Aug 7 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM SATURDAY TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, AND 433... * AFFECTED AREA...Fire weather zones 417, 418, 419, 423, 424, 428, 429, 430, 431, 432, and 433. * WIND...During the daytime hours, west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Friday and on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara, Goshen, and Eastern Laramie Counties. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours both Saturday and Sunday. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-08-08 03:31:03 168 WWUS85 KCYS 080830 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 230 AM MDT Sat Aug 8 2026 WYZ417>433-090000- /O.CON.KCYS.FW.W.0036.260808T1700Z-260810T0300Z/ 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- Laramie East High Plains-Bordeaux/Chugwater/Wheatland- Goshen/Middle-Lower North Platte River Basin- 230 AM MDT Sat Aug 8 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, AND 433... * AFFECTED AREA...Fire weather zones 417 through 433. * WIND...Saturday west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. Sunday west to northwest winds from 15 to 25 mph with gusts up to 40 mph west of I-25, with winds turning southerly to easterly east of I-25. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara and Goshen Counties. * 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 both Saturday and Sunday. * 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: 2026-08-08 16:42:26 595 WWUS85 KCYS 082141 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 341 PM MDT Sat Aug 8 2026 WYZ417>433-091200- /O.CON.KCYS.FW.W.0036.000000T0000Z-260810T0300Z/ 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- Laramie East High Plains-Bordeaux/Chugwater/Wheatland- Goshen/Middle-Lower North Platte River Basin- 341 PM MDT Sat Aug 8 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, AND 433... * AFFECTED AREA...Fire weather zones 417 through 433. * WIND...Saturday west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. Sunday west to northwest winds from 15 to 25 mph with gusts up to 40 mph west of I-25, with winds turning southerly to easterly east of I-25. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara and Goshen Counties. * 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 both Saturday and Sunday. * 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: 2026-08-09 03:03:43 019 WWUS85 KCYS 090803 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 203 AM MDT Sun Aug 9 2026 WYZ417>433-100300- /O.CON.KCYS.FW.W.0036.000000T0000Z-260810T0300Z/ 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- Laramie East High Plains-Bordeaux/Chugwater/Wheatland- Goshen/Middle-Lower North Platte River Basin- 203 AM MDT Sun Aug 9 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR GUSTY WINDS, LOW HUMIDITY, AND POOR RECOVERIES FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, AND 433... * AFFECTED AREA...Fire weather zones 417 through 433. * WIND...West to northwest winds from 15 to 25 mph with gusts up to 40 mph west of I-25, with shifting and much more variable winds expected east of I-25. * HUMIDITY...RH values between 8 and 14 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. && $$ Action: Expired Issued At: 2026-08-09 21:57:36 655 WWUS85 KCYS 100257 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 857 PM MDT Sun Aug 9 2026 WYZ417>433-100400- /O.EXP.KCYS.FW.W.0036.000000T0000Z-260810T0300Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills-Southern Laramie Valley- Southern Laramie Range-Laramie Foothills and High Plains- Laramie East High Plains-Bordeaux/Chugwater/Wheatland- Goshen/Middle-Lower North Platte River Basin- 857 PM MDT Sun Aug 9 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR FIRE WEATHER ZONES 417 THROUGH 433 IN SOUTHEAST WYOMING... While humidity remains quite low, conditions have improved above critical thresholds and the threat for dry lightning has decreased. Poor humidity recoveries are expected again tonight, generally between 30 and 50% along and west of I-25. Elevated to near critical fire weather conditions are expected both Monday and Tuesday afternoons. $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||