679
WWUS85 KRIW 220727
RFWRIW
URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT WED APR 22 2026
WYZ275-276-280>283-285-287-289-300-230000-
/O.UPG.KRIW.FW.A.0005.260422T1500Z-260423T0200Z/
/O.NEW.KRIW.FW.W.0012.260422T1500Z-260423T0200Z/
NORTH BIGHORN BASIN/WORLAND BLM-CODY FOOTHILLS-
NATRONA COUNTY/CASPER BLM-JOHNSON COUNTY/CASPER BLM-
SOUTH BIGHORN BASIN/WORLAND BLM-
UPPER WIND RIVER BASIN/WIND RIVER BASIN-SOUTH BIGHORN MOUNTAINS-
OWL CREEK MOUNTAINS-GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
CASPER MOUNTAIN-
127 AM MDT WED APR 22 2026
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT
THIS EVENING...
THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A RED FLAG
WARNING, WHICH IS IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT
THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT.
* AFFECTED AREA:
IN CENTRAL WY FIRE ZONES...280...283...285...289...300.
IN NORTH CENTRAL WY FIRE ZONES...275...276...281...282...287.
* COUNTIES AFFECTED:
IN CENTRAL WY...FREMONT...NATRONA.
IN NORTH CENTRAL WY...BIG HORN...HOT SPRINGS...JOHNSON...PARK
WASHAKIE.
IN SOUTHWEST WY...SWEETWATER.
* IMPACTS: LOW HUMIDITIES AND STRONG GUSTY WINDS COULD CAUSE
ERRATIC FIRE BEHAVIOR.
* WIND: SOUTHWEST 25 TO 40 MPH WITH GUSTS UP TO 55 MPH.
* HUMIDITY: AS LOW AS 10 TO 13 PERCENT.
* ADDITIONAL DETAILS: OCCASIONAL GUSTS OF OR AROUND 60 MPH ARE
POSSIBLE.
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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