WWUS85 KCYS 101951

RFWCYS



URGENT - FIRE WEATHER MESSAGE

National Weather Service Cheyenne WY

151 PM MDT Mon Aug 10 2026





WYZ417>427-111200-

/O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/

/O.CON.KCYS.FW.W.0037.000000T0000Z-260811T0300Z/

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-

Southwest Carbon County-Sierra Madre Range/Medicine Bow NF-

Upper North Platte River Basin-Snowy Range/Medicine Bow NF-

North Snowy Range Foothills-

151 PM MDT Mon Aug 10 2026



...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING

FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE WEATHER ZONES

417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427...



...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR

 LOW RH AND WIND GUSTS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 

417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427...



The National Weather Service in Cheyenne has issued a Red Flag

Warning, which is in effect from noon to 9 PM MDT Tuesday. 



* AFFECTED AREA...Fire weather zones 417 through 427.



* WIND...West to northwest at 10 to 20 mph with gusts up to 35 

  mph.



* HUMIDITY...Between 9 and 18 percent.



* ADDITIONAL DETAILS...Isolated high-based showers will have 

  the potential to produce gusty and erratic winds along with a 

  few strikes of lightning without much, if any, rainfall 

  during the afternoon and evening hours.



* 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.



&&



$$



WYZ428>430-111200-

/O.NEW.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/

Southern Laramie Valley-Southern Laramie Range-

Laramie Foothills and High Plains-

151 PM MDT Mon Aug 10 2026



...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR

LOW RH AND GUSTY WINDS EXCEEDING 25 MPH FOR FIRE WEATHER ZONES 

428, 429, AND 430...



The National Weather Service in Cheyenne has issued a Red Flag

Warning, which is in effect from noon to 9 PM MDT Tuesday. 



* AFFECTED AREA...Fire weather zone 428.Fire weather zone 

  429.Fire weather zone 430. 



* WIND... Northerly winds 12 to 15 gusting 25 to 30 mph



* HUMIDITY... 10 TO 20 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.



&&



$$