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Home Return to list Fire Weather Warning 0017 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-08-01 14:28:21
723
WWUS85 KRIW 011928
RFWRIW
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
128 PM MDT Sat Aug 1 2026
WYZ277>279-289-021300-
/O.UPG.KRIW.FW.A.0010.260802T1900Z-260804T0300Z/
/O.NEW.KRIW.FW.W.0017.260802T1900Z-260804T0300Z/
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Granite/Green/Ferris/Rattlesnake Mountains-
128 PM MDT Sat Aug 1 2026
...RED FLAG WARNING IN EFFECT FROM 1 PM SUNDAY TO 9 PM MDT
MONDAY...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from 1 PM Sunday to 9 PM MDT Monday.
the Fire Weather Watch is no longer in effect.
* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zone....289.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.
* WIND: Northwest 10 to 20 mph with gusts to 35 mph.
* HUMIDITY: 5 to 10 percent.
* TEMPERATURES: Highs in the upper 80s and low 90s. Lows in the
upper 50s to low 60s.
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.
&&
$$
WYZ275-276-282-283-285-021300-
/O.UPG.KRIW.FW.A.0010.260802T1900Z-260803T0300Z/
/O.NEW.KRIW.FW.W.0017.260802T1900Z-260803T0300Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
South Bighorn Basin/Worland BLM-
Upper Wind River Basin/Wind River Basin-South Bighorn Mountains-
128 PM MDT Sat Aug 1 2026
...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM MDT SUNDAY...
The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from 1 PM to 9 PM MDT Sunday. the Fire
Weather Watch is no longer in effect.
* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...283...285.
In North Central WY Fire Zones...275...276...282.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
* WIND: West 10 to 20 mph with gusts to 30 mph.
* HUMIDITY: 5 to 10 percent.
* TEMPERATURES: Highs in the upper 90s to low 100s.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
http://weather.gov/riverton
Action: Continued Issued At: 2026-08-02 01:33:42
549
WWUS85 KRIW 020633
RFWRIW
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
1233 AM MDT Sun Aug 2 2026
WYZ277>279-289-030000-
/O.CON.KRIW.FW.W.0017.260802T1900Z-260804T0300Z/
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Granite/Green/Ferris/Rattlesnake Mountains-
1233 AM MDT Sun Aug 2 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO
9 PM MDT MONDAY...
* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zone....289.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.
* WIND: Northwest 15 to 25 mph with gusts up to 35 mph.
* HUMIDITY: 5 to 10 percent Sunday; 10 to 15 percent Monday.
* TEMPERATURES: Highs in the 90s Sunday. Highs in the 80s to 90 on
Monday..
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.
&&
$$
WYZ275-276-282-283-285-030000-
/O.CON.KRIW.FW.W.0017.260802T1900Z-260803T0300Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
South Bighorn Basin/Worland BLM-
Upper Wind River Basin/Wind River Basin-South Bighorn Mountains-
1233 AM MDT Sun Aug 2 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO
9 PM MDT THIS EVENING...
* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...283...285.
In North Central WY Fire Zones...275...276...282.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
* WIND: West 15 to 25 mph with gusts up to 35 mph.
* HUMIDITY: 5 to 10 percent.
* TEMPERATURES: Highs in the upper 90s to low 100s.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
http://weather.gov/riverton
Action: Continued Issued At: 2026-08-02 14:30:52
858
WWUS85 KRIW 021930
RFWRIW
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
130 PM MDT Sun Aug 2 2026
WYZ277>279-289-030300-
/O.CON.KRIW.FW.W.0017.000000T0000Z-260804T0300Z/
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Granite/Green/Ferris/Rattlesnake Mountains-
130 PM MDT Sun Aug 2 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY...
* IMPACTS: Low Humidity, Hot Temperatures, and Gusty Westerly Wind
could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zone....289.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.
* WIND: Westerly wind 10 to 20 mph with gusts up to 30 mph Sunday.
West-northwest wind 15 to 25 mph with gusts up to 35 mph Monday.
* HUMIDITY: 5 to 10 percent Sunday, and 8 to 13 percent Monday.
* TEMPERATURES: Highs around 90 Sunday, and in the 80s Monday.
Sunday Night low temperatures in the 50s.
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.
&&
$$
WYZ275-276-282-283-285-030300-
/O.CON.KRIW.FW.W.0017.000000T0000Z-260803T0300Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
South Bighorn Basin/Worland BLM-
Upper Wind River Basin/Wind River Basin-South Bighorn Mountains-
130 PM MDT Sun Aug 2 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY...
* IMPACTS: Low Humidity, Hot Temperatures, and Gusty Westerly Wind
could cause erratic fire behavior.
* AFFECTED AREA:
In Central WY Fire Zones...283...285.
In North Central WY Fire Zones...275...276...282.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
* WIND: Westerly 10 to 20 mph with gusts to around 30 mph.
* HUMIDITY: 5 to 10 percent.
* TEMPERATURES: Highs in the upper 90s to lower 100s.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions are
either occurring now....or will shortly. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
http://weather.gov/riverton
Action: Continued Issued At: 2026-08-02 21:52:34 248 WWUS85 KRIW 030252 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 852 PM MDT Sun Aug 2 2026 WYZ275-276-282-283-285-030400- /O.CAN.KRIW.FW.W.0017.000000T0000Z-260803T0300Z/ North Bighorn Basin/Worland BLM-Cody Foothills- South Bighorn Basin/Worland BLM- Upper Wind River Basin/Wind River Basin-South Bighorn Mountains- 852 PM MDT Sun Aug 2 2026 ...RED FLAG WARNING IS EXPIRED... The National Weather Service in Riverton has expired the Red Flag Warning. Wind has decreased and Humidity values have risen above critical levels, thus the Red Flag Warning will be allowed to expire at 9 PM MDT. Poor Humidity recovery will keep fire weather conditions elevated Sunday night, especially in the Bighorn Basin where wind will increase behind a cold front overnight. $$ WYZ277>279-289-032100- /O.CON.KRIW.FW.W.0017.000000T0000Z-260804T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Granite/Green/Ferris/Rattlesnake Mountains- 852 PM MDT Sun Aug 2 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY... * AFFECTED AREA: In Central WY Fire Zone....289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * WIND: West-northwest wind 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: 8 to 13 percent. * TEMPERATURES: Highs in the 80s. Sunday Night low temperatures in the 50s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-03 00:10:07 385 WWUS85 KRIW 030509 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1109 PM MDT Sun Aug 2 2026 WYZ277>279-289-040300- /O.CON.KRIW.FW.W.0017.000000T0000Z-260804T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Granite/Green/Ferris/Rattlesnake Mountains- 1109 PM MDT Sun Aug 2 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY... * AFFECTED AREA: In Central WY Fire Zone....289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * WIND: Northwest 15 to 25 mph with gusts up to 30 to 35 mph. * HUMIDITY: As low as 8 to 12 percent. * TEMPERATURES: Lows in the upper 50s. 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. && $$ http://weather.gov/riverton Action: Continued Issued At: 2026-08-03 15:41:53 058 WWUS85 KRIW 032041 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 241 PM MDT Mon Aug 3 2026 WYZ277>279-289-040300- /O.CON.KRIW.FW.W.0017.000000T0000Z-260804T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Granite/Green/Ferris/Rattlesnake Mountains- 241 PM MDT Mon Aug 3 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * AFFECTED AREA: In Central WY Fire Zone....289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Northwest 20 to 30 mph with gusts up to 35 mph. * HUMIDITY: As low as 8 to 12 percent. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/riverton Action: Expired Issued At: 2026-08-03 21:51:34 413 WWUS85 KRIW 040251 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 851 PM MDT Mon Aug 3 2026 WYZ277>279-289-040400- /O.EXP.KRIW.FW.W.0017.000000T0000Z-260804T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Granite/Green/Ferris/Rattlesnake Mountains- 851 PM MDT Mon Aug 3 2026 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Humidity levels have been rising steadily this evening, and will continue to recover overnight. Thus the Red Flag Warning will be allowed to expire as scheduled. Gusty northwest winds will still continue through most of the overnight hours. $$ http://weather.gov/riverton | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||