700
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
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