257  
WWUS85 KCYS 090810  
RFWCYS  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHEYENNE WY  
210 AM MDT WED JUL 9 2025  
 
RED FLAG WARNING IN EFFECT FOR CRITICALLY LOW RH VALUES WEDNESDAY  
ALONGSIDE POOR OVERNIGHT RECOVERIES EARLY THIS MORNING WITH  
BREEZY AFTERNOON WINDS.  
 
WYZ420>423-425-427-092130-  
/O.CON.KCYS.FW.W.0011.000000T0000Z-250710T0400Z/  
NORTH LARAMIE VALLEY/SHIRLEY BASIN-  
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-CENTRAL AND WEST CARBON-  
SOUTHWEST CARBON COUNTY-UPPER NORTH PLATTE RIVER BASIN-  
NORTH SNOWY RANGE FOOTHILLS-  
210 AM MDT WED JUL 9 2025  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS  
EVENING FOR DRY AND BREEZY CONDITIONS WITH POOR OVERNIGHT  
RECOVERIES...  
 
* AFFECTED AREA...FIRE WEATHER ZONE 420, 421, 422, AND ZONE 425.  
 
 
* WIND...10 TO 15 MPH WITH GUSTS UP TO 30 MPH.  
 
* HUMIDITY...8 TO 13 PERCENT. OVERNIGHT RECOVERY 25 TO 30  
PERCENT EARLY THIS MORNING.  
 
* IMPACTS...ANY FIRES THAT DEVELOP MAY 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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