553  
WWUS85 KCYS 181947  
RFWCYS  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHEYENNE WY  
147 PM MDT WED JUL 18 2018  
 
...CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED BOTH THIS  
AFTERNOON AND EARLY EVENING AND THURSDAY AFTERNOON AND EARLY  
EVENING FOR ZONES 303, 304 AND 308...  
 
WYZ303-304-308-191100-  
/O.UPG.KCYS.FW.A.0010.180719T1700Z-180720T0200Z/  
/O.NEW.KCYS.FW.W.0016.180719T1700Z-180720T0200Z/  
/O.CON.KCYS.FW.W.0015.000000T0000Z-180719T0200Z/  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
SOUTHWEST CARBON COUNTY-LARAMIE VALLEY/SHIRLEY BASIN-  
147 PM MDT WED JUL 18 2018  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING  
FOR GUSTY WINDS AND LOW HUMIDITIES FOR FIRE WEATHER ZONES 303,  
304, AND 308...  
 
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT THURSDAY FOR  
GUSTY WINDS AND LOW HUMIDITIES FOR FIRE WEATHER ZONES 303, 304,  
AND 308...  
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A RED FLAG  
WARNING, WHICH IS IN EFFECT FROM 11 AM TO 8 PM MDT THURSDAY. THE  
FIRE WEATHER WATCH IS NO LONGER IN EFFECT.  
 
* AFFECTED AREA...FIRE WEATHER ZONE 303. FIRE WEATHER ZONE 304.  
FIRE WEATHER ZONE 308.  
 
* 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.  
 

 
 

 
 
WYZ309-191100-  
/O.NEW.KCYS.FW.A.0011.180719T1700Z-180720T0200Z/  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
147 PM MDT WED JUL 18 2018  
 
...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY MORNING THROUGH  
THURSDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITIES FOR FIRE  
WEATHER ZONE 309...  
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A FIRE  
WEATHER WATCH, WHICH IS IN EFFECT FROM LATE THURSDAY MORNING  
THROUGH EARLY THURSDAY EVENING.  
 
* AFFECTED AREA...FIRE WEATHER ZONE 309.  
 
* WIND...WESTERLY 15 TO 20 MPH WITH GUSTS OVER 30 MPH.  
 
* HUMIDITY...FALLING TO 10 TO 15 PERCENT  
 
* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.  
OUTDOOR BURNING IS NOT RECOMMENDED.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
MAY DEVELOP. LISTEN FOR LATER FORECASTS AND POSSIBLE RED FLAG  
WARNINGS.  
 

 
 

 
 
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