256  
WWUS85 KCYS 190147  
RFWCYS  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHEYENNE WY  
747 PM MDT WED JUL 18 2018  
   
..RED FLAG WARNING FOR STRONG WINDS AND LOW HUMIDITY FWZ 302
 
 
303...304...305...307...308 AND 309 FOR THURSDAY...  
   
..RED FLAG WARNING EXPIRES AT 8 PM FOR FWZ 303...304
 
308 AND  
309 THIS EVENING...  
 
WYZ303-304-308-309-191000-  
/O.EXP.KCYS.FW.W.0015.000000T0000Z-180719T0200Z/  
/O.CON.KCYS.FW.W.0016.180719T1700Z-180720T0200Z/  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
SOUTHWEST CARBON COUNTY-LARAMIE VALLEY/SHIRLEY BASIN-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
747 PM MDT WED JUL 18 2018  
 
...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT  
THURSDAY FOR GUSTY SOUTHWEST WINDS AND LOW HUMIDITY FOR FIRE  
WEATHER ZONES 303, 304, 308 AND 309...  
 
...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR  
GUSTY SOUTHWEST WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 303,  
304, 308 AND 309...  
 
* AFFECTED AREA...FIRE WEATHER ZONE 303. FIRE WEATHER ZONE 304.  
FIRE WEATHER ZONE 308. FIRE WEATHER ZONE 309.  
 
* WIND...WINDS EASING THIS EVENING ALLOWING TODAYS WARNING TO  
EXPIRE. WIND INCREASING THURSDAY TO WEST 15 TO 25 MPH WITH  
GUSTS TO 35 MPH.  
 
* HUMIDITY...FALLING TO 8 TO 13 PERCENT DURING THE AFTERNOON.  
 
* 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.  
 

 
 

 
 
WYZ302-305-307-191000-  
/O.CON.KCYS.FW.W.0016.180719T1700Z-180720T0200Z/  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
SIERRA MADRE RANGE/MEDICINE BOW NF-SNOWY RANGE/MEDICINE BOW NF-  
747 PM MDT WED JUL 18 2018  
 
...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT  
THURSDAY FOR STRONG WEST TO SOUTHWEST WINDS AND CRITICAL  
AFTERNOON HUMIDITY FOR FIRE WEATHER ZONES 302, 305, AND 307...  
 
* AFFECTED AREA...FIRE WEATHER ZONE 302. FIRE WEATHER ZONE 305.  
FIRE WEATHER ZONE 307.  
 
* WIND...WEST 15 TO 25 MPH WITH GUSTS TO 35 MPH.  
 
* HUMIDITY...FALLING TO 8 TO 13 PERCENT DURING THE AFTERNOON.  
 
* 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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