787  
FNUS76 KSGX 232003  
FWSSGX  
 
SPOT FORECAST FOR THOMAS UNIT 1...USFS  
NATIONAL WEATHER SERVICE SAN DIEGO CA  
1203 PM PST TUE JAN 23 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 PST ON JANUARY 24.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
EASTERLY WINDS WILL CONTINUE THROUGH WEDNESDAY. STRONG AND GUSTY  
WESTERLY WINDS WILL DEVELOP LATE WEDNESDAY NIGHT THROUGH THURSDAY  
AS A LOW PRESSURE TROUGH MOVES BY TO THE NORTH. WETTING RAINS ARE  
NOT EXPECTED WITH THE SYSTEM, HOWEVER GOOD OVERNIGHT RELATIVE  
HUMIDITY RECOVERY IS EXPECTED THURSDAY NIGHT. POOR OVERNIGHT  
RELATIVE HUMIDITY RECOVERY IS EXPECTED UNTIL THEN, WITH AFTERNOON  
MINIMUM VALUES AROUND 15 PERCENT WEDNESDAY AND 25 PERCENT  
THURSDAY.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....AROUND 52.  
MIN HUMIDITY........15 PERCENT.  
EYE LEVEL WINDS.....EAST SOUTHEAST 4 TO 6 MPH...BECOMING  
SOUTH SOUTHEAST 3 TO 5 MPH AFTER 1300.  
WIND (20 FT)........  
SLOPES.............EAST SOUTHEAST 7 TO 10 MPH WITH GUSTS TO  
14 MPH...BECOMING SOUTH SOUTHEAST 6 TO 9 MPH  
AFTER 1300.  
RIDGETOP...........SOUTHEAST 15 MPH WITH GUSTS TO 20 MPH.  
CWR.................0 PERCENT.  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....AROUND 37.  
MAX HUMIDITY........35 PERCENT.  
EYE LEVEL WINDS.....LIGHT AND DOWNSLOPE AFTER 1900.  
WIND (20 FT)........  
SLOPES.............LIGHT AND DOWNSLOPE AFTER 1900...THEN  
SOUTHWEST 5 TO 10 MPH WITH GUSTS TO 15 MPH  
AFTER 0400.  
RIDGETOP...........SOUTHWEST 20 MPH WITH GUSTS TO 30 MPH.  
CWR.................0 PERCENT.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY...BECOMING PARTLY CLOUDY.  
MAX TEMPERATURE.....AROUND 43.  
MIN HUMIDITY........25 PERCENT.  
EYE LEVEL WINDS.....WEST 10 TO 15 MPH WITH GUSTS TO 20 MPH.  
WIND (20 FT)........  
SLOPES.............WEST 15 TO 20 MPH WITH GUSTS TO 35 MPH.  
RIDGETOP...........WEST 35 MPH WITH GUSTS TO 50 MPH.  
CWR.................5 PERCENT.  
MIXING HEIGHT.......500-2000 FT AGL...BECOMING 2000-2500 FT AGL IN  
THE LATE MORNING AND AFTERNOON.  
MIXING WINDS........WEST 25 MPH.  
 

 
FORECASTER...JIMMY TAEGER  
REQUESTED BY...GARTH CROW  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1800737.0/SGX  
.EMAIL GCROW@FS.FED.US  
 
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