Alert archive / Wyoming / Red Flag Warnings in 2020
Red Flag Warning 21, NWS Riverton, WY
NWS Riverton, WY issued this red flag warning at Sep 23, 2020, 2:21 PM MDT for 12 counties in Wyoming. It took effect at Sep 24, 2020, 12:00 PM MDT. It was in force for 31 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 23, 2020, 2:21 PM MDT (20:21 UTC)
- In effect from
- Sep 24, 2020, 12:00 PM MDT
- Expired
- Sep 25, 2020, 7:00 PM MDT
- In force
- 31 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Fremont County, WY, Hot Springs County, WY, Johnson County, WY, Lincoln County, WY, Natrona County, WY, Park County, WY, Sublette County, WY, Sweetwater County, WY, Teton County, WY, Uinta County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 35 km from the middle of the area, began a volume at 20:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 24, 6:53 PM MDT | NON-TSTM WND GST 60 | Buffalo, WY |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 8.4 hours before the alert went out and 41 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2354 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
485 WWUS85 KRIW 232021 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 221 PM MDT Wed Sep 23 2020 WYZ277>279-414-416-241200- /O.UPG.KRIW.FW.A.0017.200924T1800Z-200925T0300Z/ /O.NEW.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- West Wind River Mountains/East Zone Bridger Teton NF- 221 PM MDT Wed Sep 23 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Thursday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and any new fire starts. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 20 to 25 mph with gusts of 35 to 40 mph. * HUMIDITY: 12 to 15 percent. * TEMPERATURES: Highs in the mid 70s to low 80s in the lower elevations. Highs in the mid 60s to mid 70s in the mountains. 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. && $$ WYZ280-281-283-285-288-289-300-241200- /O.UPG.KRIW.FW.A.0017.200924T1800Z-200925T0300Z/ /O.NEW.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Upper Wind River Basin/Wind River Basin-South Bighorn Mountains- East Wind River Mountains/South Shoshone NF- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 221 PM MDT Wed Sep 23 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Thursday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and any new fire starts. * AFFECTED AREA: In Central WY Fire Zones...280...283...285...288...289...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. In Southwest WY...Sweetwater. In West Central WY...Sublette. * WIND: Southwest 20 to 25 mph with gusts of 35 to 40 mph. Higher gusts over 40 mph expected in zone 288. * HUMIDITY: 11 to 14 percent. * TEMPERATURES: Highs in the middle to upper 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ275-276-282-286-287-241200- /O.UPG.KRIW.FW.A.0017.200924T1800Z-200925T0300Z/ /O.NEW.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ North Big Horn Basin/Worland BLM-Cody Foothills- South Big Horn Basin/Worland BLM- Absaroka Mountains/North Shoshone NF-Owl Creek Mountains- 221 PM MDT Wed Sep 23 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Thursday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and any new fire starts. * AFFECTED AREA: In North Central WY Fire Zones...275...276...282...287. In Northwest WY Fire Zone....286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Big Horn...Hot Springs...Park...Washakie. * WIND: West to southwest 15 to 25 mph with gusts up to 30 mph. Gusts of 40 to 50 mph expected in the mountains. * HUMIDITY: 13 to 15 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. && $$ http://weather.gov/riverton
7 follow-up statements
692 WWUS85 KRIW 240920 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 320 AM MDT Thu Sep 24 2020 WYZ277>279-414-416-242300- /O.CON.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- West Wind River Mountains/East Zone Bridger Teton NF- 320 AM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 20 to 25 mph with gusts of 35 to 40 mph. * HUMIDITY: 12 to 15 percent. * TEMPERATURES: Highs in the mid 70s to low 80s in the lower elevations. Highs in the mid 60s to mid 70s in the mountains. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-281-283-285-288-289-300-242300- /O.CON.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Upper Wind River Basin/Wind River Basin-South Bighorn Mountains- East Wind River Mountains/South Shoshone NF- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 320 AM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Central WY Fire Zones...280...283...285...288...289...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. In Southwest WY...Sweetwater. In West Central WY...Sublette. * WIND: Southwest 20 to 25 mph with gusts of 35 to 40 mph. Higher gusts over 40 mph expected in zone 288. * HUMIDITY: 11 to 14 percent. * TEMPERATURES: Highs in the middle to upper 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. && $$ WYZ275-276-282-286-287-242300- /O.CON.KRIW.FW.W.0021.200924T1800Z-200925T0300Z/ North Big Horn Basin/Worland BLM-Cody Foothills- South Big Horn Basin/Worland BLM- Absaroka Mountains/North Shoshone NF-Owl Creek Mountains- 320 AM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zones...275...276...282...287. In Northwest WY Fire Zone....286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Big Horn...Hot Springs...Park...Washakie. * WIND: West to southwest 15 to 25 mph with gusts up to 30 mph. Gusts of 40 to 50 mph expected in the mountains. * HUMIDITY: 13 to 15 percent. * TEMPERATURES: Highs ranging from the 70s in the mountains to the mid to upper 80s in the lower elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton
568 WWUS85 KRIW 241801 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1201 PM MDT Thu Sep 24 2020 WYZ277>279-414-416-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- West Wind River Mountains/East Zone Bridger Teton NF- 1201 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 20 to 30 mph with gusts up to 40 mph. * HUMIDITY: As low as 12 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. && $$ WYZ280-281-283-285-288-289-300-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ Natrona County/Casper BLM-Johnson County/Casper BLM- Upper Wind River Basin/Wind River Basin-South Bighorn Mountains- East Wind River Mountains/South Shoshone NF- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 1201 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Central WY Fire Zones...280...283...285...288...289...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. In Southwest WY...Sweetwater. In West Central WY...Sublette. * WIND: West 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs in the lower 80s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ275-276-282-286-287-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ North Big Horn Basin/Worland BLM-Cody Foothills- South Big Horn Basin/Worland BLM- Absaroka Mountains/North Shoshone NF-Owl Creek Mountains- 1201 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zones...275...276...282...287. In Northwest WY Fire Zone....286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Big Horn...Hot Springs...Park...Washakie. * WIND: West 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Highs around 80. 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. && $$ http://weather.gov/riverton
798 WWUS85 KRIW 241928 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 128 PM MDT Thu Sep 24 2020 WYZ277-279-250330- /O.EXT.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Lincoln and Uinta Counties/Lower Elevations- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 128 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING NOW IN EFFECT UNTIL 7 PM MDT FRIDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In Southwest WY...Fire Weather Zones 277 and 279. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln. * WIND: West to southwest 20 to 30 mph with gusts up to 40 mph. * HUMIDITY: As low as 12 percent Thursday. As low as 14 percent Friday. * TEMPERATURES: Highs in the upper 70s to lower 80s Thursday. Highs in the 70s Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-289-300-250330- /O.EXT.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Natrona County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 128 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING NOW IN EFFECT UNTIL 7 PM MDT FRIDAY... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West to southwest 20 to 30 mph with gusts up to 40 mph. * HUMIDITY: 11 to 14 percent Thursday. 14 to 16 percent Friday. * TEMPERATURES: Highs in the low to mid 80s Thursday. Highs in the upper 70s to near 80 degrees Friday. 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. && $$ WYZ278-414-416-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ Upper Green River Basin/Rock Springs BLM- Salt and Wyoming Ranges/West Zone Bridger Teton NF- West Wind River Mountains/East Zone Bridger Teton NF- 128 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In West Central WY...Fire Weather Zones 278...414 and 416. * COUNTIES AFFECTED: In Central WY...Fremont. In Southwest WY...Sweetwater. In West Central WY...Lincoln...Sublette. * WIND: West 20 to 30 mph with gusts up to 40 mph. * HUMIDITY: As low as 13 percent. * TEMPERATURES: Highs in the middle to upper 70s in the lower elevations. Highs in the mid 60s to mid 70s in the mountains. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ281-283-285-288-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ Johnson County/Casper BLM-Upper Wind River Basin/Wind River Basin- South Bighorn Mountains- East Wind River Mountains/South Shoshone NF- 128 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In Central WY Fire Zones...283...285...288. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Washakie. In West Central WY...Sublette. * WIND: West-southwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: 10 to 13 percent. * TEMPERATURES: Highs in the middle to upper 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. && $$ WYZ275-276-282-286-287-250300- /O.CON.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ North Big Horn Basin/Worland BLM-Cody Foothills- South Big Horn Basin/Worland BLM- Absaroka Mountains/North Shoshone NF-Owl Creek Mountains- 128 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zones...275...276...282...287. In Northwest WY Fire Zone....286. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Big Horn...Hot Springs...Park...Washakie. * WIND: West to southwest 15 to 25 mph with gusts up to 30 mph. Gusts of 40 to 50 mph expected in the mountains. * HUMIDITY: 11 to 13 percent. * TEMPERATURES: Highs in the 80s to near 90 degrees in the lower elevations. Highs in the upper 60s to middle 70s in the mountains. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton
524 WWUS85 KRIW 250306 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 906 PM MDT Thu Sep 24 2020 WYZ275-276-278-281>283-285>288-414-416-250415- /O.EXP.KRIW.FW.W.0021.000000T0000Z-200925T0300Z/ North Big Horn Basin/Worland BLM-Cody Foothills- Upper Green River Basin/Rock Springs BLM-Johnson County/Casper BLM- South Big Horn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-South Bighorn Mountains- Absaroka Mountains/North Shoshone NF-Owl Creek Mountains- East Wind River Mountains/South Shoshone NF- Salt and Wyoming Ranges/West Zone Bridger Teton NF- West Wind River Mountains/East Zone Bridger Teton NF- 906 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING HAS EXPIRED... Relative humidity has begun to increase, while winds have relaxed across the area. Thus the warning has been allowed to expire. $$ WYZ277-279-251515- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Lincoln and Uinta Counties/Lower Elevations- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 906 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT FRIDAY... * IMPACTS: Low Humidities and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Southwest WY...Fire Weather Zones 277 and 279. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln. * WIND: West 20 to 30 mph with gusts up to 45 mph during the day Friday. * HUMIDITY: As low as 10 percent Friday afternoon. * TEMPERATURES: Highs in the mid 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-289-300-251515- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Natrona County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 906 PM MDT Thu Sep 24 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT FRIDAY... * IMPACTS: Low Humidities and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 20 to 30 mph with gusts up to 50 mph during the day Friday. * HUMIDITY: As low as 10 percent Friday afternoon. * TEMPERATURES: Highs in the mid 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. && $$ http://weather.gov/riverton
102 WWUS85 KRIW 250909 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 309 AM MDT Fri Sep 25 2020 WYZ277-279-260100- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Lincoln and Uinta Counties/Lower Elevations- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 309 AM MDT Fri Sep 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING... * IMPACTS: Low Humidities and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Southwest WY...Fire Weather Zones 277 and 279. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln. * WIND: West 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the mid 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-289-300-260100- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Natrona County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 309 AM MDT Fri Sep 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING... * IMPACTS: Low Humidities and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 20 to 30 mph with gusts up to 50 mph. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Highs in the mid 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. && $$ http://weather.gov/riverton
742 WWUS85 KRIW 251805 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1205 PM MDT Fri Sep 25 2020 WYZ277-279-260100- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Lincoln and Uinta Counties/Lower Elevations- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- 1205 PM MDT Fri Sep 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In Southwest WY...Fire Weather Zones 277 and 279. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln. * WIND: West 20 to 30 mph with gusts up to 40 mph. * HUMIDITY: 12 to 16 percent. * TEMPERATURES: Highs in the mid 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ280-289-300-260100- /O.CON.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Natrona County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 1205 PM MDT Fri Sep 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Gusty Winds will create erratic fire behavior for existing fires and new fire starts. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: Southwest 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: 13 to 15 percent. * TEMPERATURES: Highs in the mid 70s to near 80 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. && $$ http://weather.gov/riverton
940 WWUS85 KRIW 260120 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 720 PM MDT Fri Sep 25 2020 WYZ277-279-280-289-300-260230- /O.EXP.KRIW.FW.W.0021.000000T0000Z-200926T0100Z/ Lincoln and Uinta Counties/Lower Elevations- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Natrona County/Casper BLM- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 720 PM MDT Fri Sep 25 2020 ...RED FLAG WARNING HAS EXPIRED... Relative humidity is increasing, and will continue through the night. Thus the Red Flag Warning has been allowed to expire. $$ http://weather.gov/riverton
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 6:30 PM MDT | Special Weather Statement | RIW | Fremont | 30 min |
| Sep 23, 2:43 AM MDT | Fire Weather Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 12 hr |
Nearby
Red Flag Warnings in Wyoming, 2020Every red flag warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.