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Home Return to list Fire Weather Warning 0005 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-03-20 03:02:46 728 WWUS85 KRIW 200802 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 202 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 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. && $$ http://weather.gov/riverton Action: New Issued At: 2026-03-20 03:02:46 728 WWUS85 KRIW 200802 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 202 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ276-282-283-287-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 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. && $$ WYZ280-281-289-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: New Issued At: 2026-03-20 03:02:46 728 WWUS85 KRIW 200802 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 202 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-210000- /O.CAN.KRIW.FW.W.0004.000000T0000Z-260322T0300Z/ /O.NEW.KRIW.FW.W.0005.260321T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 202 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 PM MDT SATURDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 6 PM this evening to 9 PM MDT Saturday. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 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. && $$ http://weather.gov/riverton Action: Time Extended Issued At: 2026-03-20 06:11:53 915 WWUS85 KRIW 201111 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 511 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ276-282-283-287-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 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. && $$ WYZ280-281-289-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 10 to 15 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Time Extended Issued At: 2026-03-20 06:11:53 915 WWUS85 KRIW 201111 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 511 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 10 to 15 percent. * TEMPERATURES: Highs in the mid 70s to lower 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. && $$ http://weather.gov/riverton Action: Time Extended Issued At: 2026-03-20 06:11:53 915 WWUS85 KRIW 201111 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 511 AM MDT Fri Mar 20 2026 WYZ277>279-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 25 to 30 mph Friday; 20 to 30 mph with gusts to 40 to 45 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ276-282-283-287-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph Friday; west 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 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. && $$ WYZ280-281-289-210000- /O.EXT.KRIW.FW.W.0005.260320T1111Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 511 AM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph Friday; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 10 to 15 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-20 14:37:53 082 WWUS85 KRIW 201937 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 137 PM MDT Fri Mar 20 2026 WYZ277>279-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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 today; 20 to 30 mph with gusts to 40 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. 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. && $$ WYZ276-282-283-287-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph today; west 20 to 30 mph with gusts to 50 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph today; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. 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. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-20 14:37:53 082 WWUS85 KRIW 201937 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 137 PM MDT Fri Mar 20 2026 WYZ277>279-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph today; 20 to 30 mph with gusts to 40 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ276-282-283-287-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph today; west 20 to 30 mph with gusts to 50 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. 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. && $$ WYZ280-281-289-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph today; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-20 14:37:53 082 WWUS85 KRIW 201937 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 137 PM MDT Fri Mar 20 2026 WYZ277>279-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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 today; 20 to 30 mph with gusts to 40 mph Saturday. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 70s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. 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. && $$ WYZ276-282-283-287-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: West to southwest 10 to 20 mph with gusts to 25 to 30 mph today; west 20 to 30 mph with gusts to 50 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the upper 70s to middle 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-211300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 137 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph today; west to southwest 20 to 30 mph with gusts to 45 mph Saturday. * HUMIDITY: 9 to 14 percent. * TEMPERATURES: Highs in the mid 70s to lower 80s. * ADDITIONAL DETAILS: Conditions are expected to improve during the overnight hours. 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. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-21 01:35:46 793 WWUS85 KRIW 210635 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1235 AM MDT Sat Mar 21 2026 WYZ275-220300- /O.EXB.KRIW.FW.W.0005.260321T1700Z-260322T0300Z/ North Bighorn Basin/Worland BLM- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 11 AM this morning to 9 PM MDT this evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 275. * COUNTIES AFFECTED: In North Central WY...Big Horn...Park. * WIND: West 20 to 30 mph with gusts up to 45 mph, becoming northwest at similar speeds late this afternoon and evening. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the upper 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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: Southwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: Southwest 20 to 30 mph with gusts up to 50 mph, with the strongest wind in Zones 276, 283 and 287. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the upper 70s to mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: 9 to 15 percent. * TEMPERATURES: Highs in the upper 70s to 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. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-21 01:35:46 793 WWUS85 KRIW 210635 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1235 AM MDT Sat Mar 21 2026 WYZ275-220300- /O.EXB.KRIW.FW.W.0005.260321T1700Z-260322T0300Z/ North Bighorn Basin/Worland BLM- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 11 AM this morning to 9 PM MDT this evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 275. * COUNTIES AFFECTED: In North Central WY...Big Horn...Park. * WIND: West 20 to 30 mph with gusts up to 45 mph, becoming northwest at similar speeds late this afternoon and evening. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the upper 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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: Southwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: Southwest 20 to 30 mph with gusts up to 50 mph, with the strongest wind in Zones 276, 283 and 287. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the upper 70s to mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: 9 to 15 percent. * TEMPERATURES: Highs in the upper 70s to 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. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-03-21 01:35:46 793 WWUS85 KRIW 210635 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1235 AM MDT Sat Mar 21 2026 WYZ275-220300- /O.EXB.KRIW.FW.W.0005.260321T1700Z-260322T0300Z/ North Bighorn Basin/Worland BLM- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 11 AM this morning to 9 PM MDT this evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 275. * COUNTIES AFFECTED: In North Central WY...Big Horn...Park. * WIND: West 20 to 30 mph with gusts up to 45 mph, becoming northwest at similar speeds late this afternoon and evening. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the upper 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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: Southwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: Southwest 20 to 30 mph with gusts up to 50 mph, with the strongest wind in Zones 276, 283 and 287. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the upper 70s to mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: 9 to 15 percent. * TEMPERATURES: Highs in the upper 70s to 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. && $$ http://weather.gov/riverton Action: Time and Area Extended Issued At: 2026-03-21 01:35:46 793 WWUS85 KRIW 210635 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1235 AM MDT Sat Mar 21 2026 WYZ275-220300- /O.EXB.KRIW.FW.W.0005.260321T1700Z-260322T0300Z/ North Bighorn Basin/Worland BLM- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 11 AM this morning to 9 PM MDT this evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 275. * COUNTIES AFFECTED: In North Central WY...Big Horn...Park. * WIND: West 20 to 30 mph with gusts up to 45 mph, becoming northwest at similar speeds late this afternoon and evening. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the upper 70s to lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ277>279-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty 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: Southwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the 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. && $$ WYZ276-282-283-287-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Cody Foothills-South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....283. In North Central WY Fire Zones...276...282...287. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park...Washakie. * WIND: Southwest 20 to 30 mph with gusts up to 50 mph, with the strongest wind in Zones 276, 283 and 287. * HUMIDITY: 8 to 14 percent. * TEMPERATURES: Highs in the upper 70s to mid 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-289-220300- /O.CON.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains- 1235 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Southwest 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: 9 to 15 percent. * TEMPERATURES: Highs in the upper 70s to 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. && $$ http://weather.gov/riverton Action: Cancelled Issued At: 2026-03-21 21:42:39 567 WWUS85 KRIW 220242 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 842 PM MDT Sat Mar 21 2026 WYZ275>283-287-289-220345- /O.CAN.KRIW.FW.W.0005.000000T0000Z-260322T0300Z/ North Bighorn Basin/Worland BLM-Cody Foothills- Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Natrona County/Casper BLM-Johnson County/Casper BLM- South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-Owl Creek Mountains- Granite/Green/Ferris/Rattlesnake Mountains- 842 PM MDT Sat Mar 21 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MST SATURDAY... Winds have diminished as a cold front pushes through. Cooler air and a north wind are pushing through central portions of the area. As a result, the red flag warning will expire at 9 PM Saturday. $$ http://weather.gov/riverton | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||