870
WWUS85 KCYS 081244
RFWCYS
URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
644 AM MDT TUE SEP 8 2026
..RED FLAG WARNING GOES INTO AFFECT AT NOON
WYZ417>422-427-090130-
/O.NEW.KCYS.FW.W.0040.260908T1800Z-260909T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-
MIDDLE NORTH PLATTE RIVER BASIN/NIOBRARA AND CONVERSE HIGH PLAINS-
NORTH LARAMIE RANGE AND ADJACENT HIGH PLAINS-
NORTH LARAMIE VALLEY/SHIRLEY BASIN-
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-CENTRAL AND WEST CARBON-
NORTH SNOWY RANGE FOOTHILLS-
644 AM MDT TUE SEP 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS
EVENING FOR LOW RH AND GUSTY WINDS FOR FIRE WEATHER ZONES 417,
418, 419, 420, 421, 422, AND 427...
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A RED FLAG
WARNING, WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS
EVENING.
* AFFECTED AREA...FIRE WEATHER ZONE 417.FIRE WEATHER ZONE
418.FIRE WEATHER ZONE 419.FIRE WEATHER ZONE 420.FIRE WEATHER
ZONE 421.FIRE WEATHER ZONE 422.FIRE WEATHER ZONE 427.
* WIND... WESTERLY WINDS GUSTING TO 35 MPH
* HUMIDITY...BETWEEN 10 AND 15 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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