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