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WWUS85 KCYS 080153
RFWCYS
URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
753 PM MDT THU AUG 7 2025
...MULTI-DAY CRITICAL FIRE WEATHER CONDITIONS CONTINUE WITH
LITTLE OVERNIGHT RELIEF...
.A MULTI-DAY CRITICAL FIRE WEATHER EVENT IS ONGOING THIS WEEK DUE
TO LOW RH VALUES INTO THE TEENS AND SINGLE DIGITS, ALONGSIDE POOR
OVERNIGHT RECOVERIES AND GUSTY WINDS. THURSDAY WILL BRING SOME OF
THE WORST CONDITIONS OF THE WEEK WITH WIDESPREAD STRONG WEST TO
SOUTHWEST WINDS AND VERY LOW RH BETWEEN 8 AND 12%.
WYZ417-418-080300-
/O.EXP.KCYS.FW.W.0017.000000T0000Z-250808T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-
MIDDLE NORTH PLATTE RIVER BASIN/NIOBRARA AND CONVERSE HIGH PLAINS-
753 PM MDT THU AUG 7 2025
..RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING
SURFACE WINDS HAVE DIMINISHED THIS EVENING WITH RELATIVE
HUMIDITIES INCREASING SLIGHTLY. THEREFORE, WILL ALLOW THE RED FLAG
WARNING TO EXPIRE ON TIME.
NEZ434-080300-
/O.EXP.KCYS.FW.W.0017.000000T0000Z-250808T0200Z/
PINE RIDGE/NEBRASKA NATIONAL FOREST-
753 PM MDT THU AUG 7 2025
..RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING
SURFACE WINDS HAVE DIMINISHED THIS EVENING WITH RELATIVE
HUMIDITIES INCREASING SLIGHTLY. THEREFORE, WILL ALLOW THE RED FLAG
WARNING TO EXPIRE ON TIME.
WYZ419>429-081800-
/O.CON.KCYS.FW.W.0017.000000T0000Z-250809T0000Z/
NORTH LARAMIE RANGE AND ADJACENT HIGH PLAINS-
NORTH LARAMIE VALLEY/SHIRLEY BASIN-
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-CENTRAL AND WEST CARBON-
SOUTHWEST CARBON COUNTY-SIERRA MADRE RANGE/MEDICINE BOW NF-
UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE/MEDICINE BOW NF-
NORTH SNOWY RANGE FOOTHILLS-SOUTHERN LARAMIE VALLEY-
SOUTHERN LARAMIE RANGE-
753 PM MDT THU AUG 7 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MDT FRIDAY FOR
LOW RH, POOR RECOVERY, AND GUSTY WINDS...
* AFFECTED AREA...FIRE WEATHER ZONES 419 THROUGH 429.
* WIND...WEST TO SOUTHWEST WINDS GUSTING 20 TO 30 MPH, ISOLATED
GUSTS 35 TO 40 MPH.
* HUMIDITY...MINIMUMS OF 8 TO 12 PERCENT; OVERNIGHT RECOVERIES
AS LOW AS 25 TO 40 PERCENT.
* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.
OUTDOOR BURNING IS NOT RECOMMENDED.
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.
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