261  
FNUS76 KLOX 232346  
FWSLOX  
 
SPOT FORECAST FOR MT WILSON RX PROJECT...USFS ANF  
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA  
346 PM PST THU JAN 23 2020  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 PST ON JANUARY 24.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A RIDGE OF HIGH PRESSURE WILL MAINTAIN WARM AND DRY CONDITIONS OVER  
THE AREA THROUGH SATURDAY. NORTH TO NORTHEAST WINDS ARE EXPECTED  
THROUGH SATURDAY MORNING, THEN SHIFTING TO THE SOUTH SATURDAY AFTERNOON.  
HUMIDITIES WILL CHANGE LITTLE THROUGH THE PERIOD. A WEAK FRONT WILL  
PASS OVER THE AREA THROUGH ON SUNDAY, WITH A VERY LOW CHANCE OF  
LIGHT RAIN. GUSTY NORTHWEST WINDS ARE EXPECTED TO STRENGTHEN AFTER  
THE FRONT PASSES SUNDAY AFTERNOON AND EVENING.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....AROUND 64-67.  
MIN HUMIDITY........25-30 PERCENT.  
EYE LEVEL WINDS.....NORTHEAST WINDS 4 TO 6 MPH WITH GUSTS TO 10 MPH,  
BECOMING NORTH 3 TO 5 MPH WITH GUSTS TO 8 MPH IN  
THE AFTERNOON.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHEAST WINDS 8 TO 12 MPH WITH GUSTS TO 20 MPH  
BECOMING NORTH 6 TO 12 MPH WITH GUSTS TO 16 MPH IN  
THE AFTERNOON.  
RIDGETOP...........NORTHEAST WINDS 8 TO 15 MPH WITH GUSTS TO 25 MPH,  
BECOMING NORTH 8 TO 12 MPH WITH LOCAL GUSTS TO 20  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1400 FT AGL RISING TO 5400 FT AGL.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....AROUND 45.  
MAX HUMIDITY........55-60 PERCENT.  
EYE LEVEL WINDS.....NORTH WINDS 4 TO 6 MPH WITH GUSTS TO 9 BECOMING  
NORTHEAST 3 TO 6 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS 8 TO 12 MPH WITH GUSTS TO 18 MPH,  
BECOMING NORTHEAST 6 TO 12 MPH.  
RIDGETOP...........NORTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH  
BECOMING NORTHEAST.  
MIXING HEIGHT.......2500 FT AGL LOWERING TO 1000 FT AGL.  
TRANSPORT WINDS.....NORTH TO NORTHEAST AROUND 10 MPH.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....61-65.  
MIN HUMIDITY........25-30 PERCENT.  
EYE LEVEL WINDS.....NORTHEAST WINDS 3 TO 6 MPH WITH GUSTS TO 10 MPH  
SHIFTING TO THE SOUTH 3 TO 5 MPH IN THE AFTERNOON.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHEAST WINDS 6 TO 12 MPH WITH GUSTS TO 20 MPH  
SHIFTING TO THE SOUTH 6 TO 10 MPH IN THE AFTERNOON.  
RIDGETOP...........NORTHEAST WINDS 8 TO 15 MPH WITH GUSTS TO 25 MPH  
SHIFTING TO THE SOUTH 8 TO 12 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1100 FT AGL RISING TO 4000 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH BECOMING NORTHWEST 5 MPH.  
 

 
FORECASTER...SMITH  
REQUESTED BY...FUELS ASSISTANT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2000838.4/LOX  
.DELDT 01/23/20  
.FORMATTERVERSION 1.0.25  
.EMAIL ZVARD.DAVIDSON@USDA.GOV  
 
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