698  
FNUS75 KFGZ 210948  
FWSFGZ  
 
SPOT FORECAST FOR WEST ZONE PILES...PRESCOTT NATIONAL FOREST  
NATIONAL WEATHER SERVICE FLAGSTAFF AZ  
248 AM MST THU OCT 21 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON OCTOBER 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE  
NATIONAL WEATHER SERVICE IN FLAGSTAFF, AZ  
   
DISCUSSION
 
DRY WEATHER WILL CONTINUE AT THE FIRE SITE TODAY  
AND TONIGHT WITH GENERALLY LIGHT WINDS. THERE WILL BE AN INCREASE  
IN SOUTH-SOUTHWESTERLY WINDS BEGINNING FRIDAY AFTERNOON. ELEVATED  
SOUTHWESTERLY WINDS WILL THEN PERSIST THROUGH THE WEEKEND.  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....68 - 70.  
MIN HUMIDITY........20 - 25 PERCENT.  
WIND (20 FT)........SOUTH WINDS AT 5 - 8 MPH WITH GUSTS TO 13 MPH  
IN THE AFTERNOON.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
CLEARING INDEX......200.  
MIXING HEIGHT.......3500 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF PCPN......0 PERCENT.  
MIN TEMPERATURE.....44 - 46.  
MAX HUMIDITY........45 - 50 PERCENT.  
WIND (20 FT)........SOUTH WINDS 4 - 6 MPH.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
CLEARING INDEX......2.  
MIXING HEIGHT.......100 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....68 - 70.  
MIN HUMIDITY........22 - 24 PERCENT.  
WIND (20 FT)........SOUTH-SOUTHWEST WINDS AT 10 - 12 MPH IN THE LATE  
MORNING THROUGH AFTERNOON WITH GUSTS UP TO 20 MPH.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
CLEARING INDEX......700.  
MIXING HEIGHT.......4500 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH INCREASING TO SOUTHWEST 15 TO  
20 MPH IN THE AFTERNOON.  
 

 
FORECASTER...LYNUM  
REQUESTED BY...AARON STAFFORD  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119854.0/FGZ  
.DELDT 10/21/21  
.FORMATTERVERSION 1.0.26  
.EMAIL AARON.STAFFORD@USDA.GOV  
 
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