392  
FNUS75 KTWC 212011  
FWSTWC  
 
SPOT FORECAST FOR BULLRIDGE RX...SAN CARLOS  
NATIONAL WEATHER SERVICE TUCSON AZ  
111 PM MST THU OCT 21 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 1400 MST ON OCTOBER 21.    
DISCUSSION
 
BENIGN WEATHER CONTINUES, WITH MAINLY LIGHT WINDS  
THAT FAVOR A SOUTHWESTERLY DIRECTION DURING THE AFTERNOON. NO  
CHANCE OF RAIN THROUGH THE FORECAST PERIOD, WITH MINIMUM  
HUMIDITIES APPROACHING 20 PERCENT AND GOOD OVERNIGHT RECOVERIES.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....AROUND 70 DEGS.  
MIN HUMIDITY........19 TO 22 PCT.  
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 4 TO 6 MPH GUSTS TO  
14 MPH.  
LAL.................1.  
CWR.................0 PERCENT.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......7600 FT AGL DECREASING TO 200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 5 KNOTS.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....42 TO 45 DEGS.  
MAX HUMIDITY........45 TO 48 PCT.  
20-FOOT WINDS.......LIGHT TERRAIN DRIVEN WINDS LESS THAN 5  
MPH.  
LAL.................1.  
CWR.................0 PERCENT.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......100 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 2 KNOTS SHIFTING TO THE  
NORTHEAST AROUND 3 KNOTS OVERNIGHT.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
MAX TEMPERATURE.....AROUND 70 DEGS.  
MIN HUMIDITY........21 TO 24 PCT.  
20-FOOT WINDS.......EAST WINDS AROUND 3 TO 5 MPH SHIFTING TO  
THE SOUTHWEST 5 TO 7 MPH GUSTS TO 15 MPH  
IN THE AFTERNOON.  
LAL.................1.  
CWR.................0 PERCENT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......200 FT AGL INCREASING TO 7300 FT AGL  
EARLY IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTH 5 TO 9 KNOTS.  
 

 
FORECASTER...HOWLETT  
REQUESTED BY...CHARLES DONA  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119890.0/TWC  
.DELDT 10/21/21  
.FORMATTERVERSION 1.0.26  
.EMAIL AZPHC@FIRENET.GOV  
 
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