171
WWUS85 KCYS 230136
RFWCYS
URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
736 PM MDT WED APR 22 2026
...RED FLAG WARNING CONTINUES THROUGH THURSDAY FOR PORTIONS OF THE
HIGH PLAINS...
NEZ435>437-WYZ430-431-433-231200-
/O.EXP.KCYS.FW.W.0018.000000T0000Z-260423T0200Z/
/O.CON.KCYS.FW.W.0019.260423T1500Z-260424T0200Z/
BOX BUTTE/SOUTH SIOUX/NIOBRARA RIVER-
LOWER NORTH PLATTE RIVER BASIN/SCOTTSBLUFF NATIONAL MONUMENT-
LODGEPOLE CREEK/SOUTHERN NEBRASKA PANHANDLE-
LARAMIE FOOTHILLS AND HIGH PLAINS-LARAMIE EAST HIGH PLAINS-
GOSHEN/MIDDLE-LOWER NORTH PLATTE RIVER BASIN-
736 PM MDT WED APR 22 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM TO 8 PM MDT
THURSDAY FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES
430, 431, 433, 435, 436, AND 437...
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A RED FLAG
WARNING, WHICH IS IN EFFECT FROM 9 AM TO 8 PM MDT THURSDAY.
* AFFECTED AREA...FIRE WEATHER ZONES 430, 431, 433, 435, 436, AND
437.
* WIND... WEST TO NORTHWEST WINDS WITH GUSTS OF 40 TO 60 MPH.
* HUMIDITY...12 TO 20 PERCENT.
* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.
OUTDOOR BURNING IS NOT RECOMMENDED.
* ADDITIONAL DETAILS... FIRE WEATHER CONDITIONS WILL REMAIN
ELEVATED OVERNIGHT. EXPECT HUMIDITY RECOVERIES ONLY TO AROUND 35
TO 45% WITH OCCASIONAL WIND GUSTS OF 40 TO 60 MPH ANTICIPATED.
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.
NEZ434-WYZ417-418-432-230245-
/O.EXP.KCYS.FW.W.0018.000000T0000Z-260423T0200Z/
PINE RIDGE/NEBRASKA NATIONAL FOREST-
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-
MIDDLE NORTH PLATTE RIVER BASIN/NIOBRARA AND CONVERSE HIGH PLAINS-
BORDEAUX/CHUGWATER/WHEATLAND-
736 PM MDT WED APR 22 2026
...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417, 418,
432, AND 434...
A COLD FRONT IS SWEEPING THROUGH THE AREA AND HUMIDITY HAS
IMPROVED ABOVE CRITICAL THRESHOLDS. FIRE WEATHER CONDITIONS WILL
REMAIN ELEVATED THROUGH THURSDAY WITH WIDESPREAD WINDS GUSTING
BETWEEN 40 AND 60 MPH AND RH BETWEEN 20 AND 30%. CONDITIONS WILL
FINALLY IMPROVE THURSDAY NIGHT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page