453  
WWUS85 KFGZ 182126  
RFWFGZ  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE FLAGSTAFF AZ  
226 PM MST WED SEP 18 2019  
 
AZZ106-107-191815-  
/O.NEW.KFGZ.FW.W.0005.190919T1800Z-190920T0300Z/  
GRAND CANYON COUNTRY (FIRE WEATHER ZONE 106)-  
COCONINO PLATEAU (FIRE WEATHER ZONE 107)-  
226 PM MST WED SEP 18 2019  
 
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MST THURSDAY DUE  
TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF WESTERN  
COCONINO COUNTY...  
 
THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A RED FLAG  
WARNING DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY, WHICH IS  
IN EFFECT FROM 11 AM TO 8 PM MST THURSDAY.  
 
* AFFECTED AREA...LOCATIONS NEAR GRAND CANYON AND VALLE. THIS  
INCLUDES PORTIONS OF THE KAIBAB NATIONAL FOREST.  
 
* WINDS...SOUTHWEST 20 TO 30 MPH WITH GUSTS UP TO 45 MPH.  
 
* RELATIVE HUMIDITY...AS LOW AS 11 PERCENT.  
 
* IMPACTS...ANY FIRES THAT DEVELOP HAVE THE POTENTIAL TO SPREAD  
RAPIDLY.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG  
WINDS AND LOW RELATIVE HUMIDITIES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR.  
 
PLEASE NOTIFY FIELD CREWS OF THIS RED FLAG WARNING.  
 

 
 

 
 
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT  
HTTP://WEATHER.GOV/FLAGSTAFF  
 
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