471  
FNUS76 KSGX 091329  
FWSSGX  
 
SPOT FORECAST FOR OBSERVATORY UNIT 1...USFS  
NATIONAL WEATHER SERVICE SAN DIEGO CA  
529 AM PST SUN FEB 9 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0625 PST ON FEBRUARY 09.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
DRY CONDITIONS TODAY, WITH HUMIDITY IN THE TEENS THIS MORNING  
INTO THE EARLY AFTERNOON. LIGHT WINDS THROUGH TODAY WITH VARIABLE  
DIRECTION, BUT GENERALLY WINDS WILL BE FROM THE SOUTHWEST TO WEST-  
SOUTHWEST. SOUTHWEST WINDS WILL PICK UP SLIGHTLY LATE TODAY, WITH  
BREEZY WINDS THROUGH MONDAY, PEAKING IN THE LATE AFTERNOON.  
HUMIDITY WILL TREND SLIGHTLY HIGHER MONDAY COMPARED TO TODAY.  
SOUTHWEST WINDS WILL DECREASE LATE MONDAY BEFORE PICKING UP AGAIN  
TUESDAY AFTERNOON. HUMIDITY WILL INCREASE OVERNIGHT MONDAY INTO  
TUESDAY, WITH GOOD TO EXCELLENT OVERNIGHT RECOVERY. THERE IS A  
SLIGHT CHANCE FOR LIGHT SNOW SHOWERS STARTING LATE TUESDAY INTO  
EARLY WEDNESDAY AS AN ATMOSPHERIC RIVER STARTS TO MOVE INTO THE  
REGION, WITH SNOW LEVELS INITIALLY AT AROUND 4500 FT MSL. SNOW  
LEVELS RISE ABOVE 6000 FEET WEDNESDAY MORNING AND REMAIN HIGH  
THROUGH THE REMAINDER OF THE STORM SYSTEM. GENERALLY LIGHT, SPOTTY  
RAIN SHOWERS WEDNESDAY WILL INCREASE IN COVERAGE OVERNIGHT INTO  
THURSDAY, WITH PERIODS OF MODERATE TO HEAVY PRECIPITATION  
THURSDAY.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (HIGH CLOUDS).  
MAX TEMPERATURE.....61-64 DEGREES.  
MIN HUMIDITY........13-15 PERCENT.  
EYE LEVEL WINDS.....VARIABLE 1-3 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......VARIABLE BUT GENERALLY SOUTHWEST 2-5 MPH.  
RIDGETOP...........SOUTH UP TO 10 MPH SHIFTING TO THE SOUTHWEST IN  
THE LATE MORNING AND AFTERNOON.  
CWR.................0 PERCENT.  
MIXING HEIGHT.......INCREASING TO 2800 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 3-5 MPH SHIFTING TO THE SOUTHWEST  
IN THE AFTERNOON.  
 
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........55 55 55 55 47 47 47 47 47 47 38 38  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............45 46 50 56 58 60 60 61 61 59 55 52  
RH..............20 19 17 15 15 15 17 19 21 25 30 30  
20 FT WIND DIR..SE SE SE S S SW W NW W SW S S  
20 FT WIND SPD..2 3 2 1 1 2 1 2 2 3 3 2  
20 FT WIND GUST.6 6 6 5 4 5 5 5 5 6 6 6  
EYE LVL WND DIR.SE SE SE S S SW W NW W SW S S  
EYE LVL WND SPD.1 2 1 1 1 1 1 1 1 2 2 1  
EYE LVL WND GST.4 5 5 4 3 4 4 4 4 5 5 5  
RIDGE WIND DIR..S SW S S SW S SW SW SW SW SW SW  
RIDGE WIND SPD..0 5 0 5 10 5 5 10 5 5 10 5  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (SOME HIGH CLOUDS).  
MIN TEMPERATURE.....AROUND 39 DEGREES.  
MAX HUMIDITY........30-34 PERCENT.  
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 5 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 7 MPH.  
RIDGETOP...........SOUTHWEST 5 TO 10 MPH INCREASING TO 10 TO 15  
MPH IN THE LATE EVENING AND OVERNIGHT.  
CWR.................1 PERCENT.  
MIXING HEIGHT.......DECREASING TO 500 FT AGL.  
TRANSPORT WINDS.....SOUTH 3 TO 6 MPH.  
 
TIME (PST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........38 38 38 38 19 19 19 19 19 19 20 20  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............48 46 45 45 44 44 44 43 43 42 41 41  
RH..............30 28 26 26 25 23 21 20 19 21 21 22  
20 FT WIND DIR..S S S SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..5 5 5 5 6 6 7 7 7 7 7 6  
20 FT WIND GUST.9 9 10 10 11 11 12 13 12 13 12 11  
EYE LVL WND DIR.S S S SW SW SW SW SW SW SW SW SW  
EYE LVL WND SPD.4 4 4 4 4 4 4 5 5 5 4 4  
EYE LVL WND GST.7 7 7 7 8 8 9 9 9 9 9 8  
RIDGE WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW  
RIDGE WIND SPD..5 10 5 5 15 10 10 15 10 10 15 10  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
   
MONDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....52-54 DEGREES.  
MIN HUMIDITY........18-20 PERCENT.  
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 6 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 7-11 MPH, GUSTS 13-16 MPH.  
RIDGETOP...........SOUTHWEST 10-15 MPH.  
CWR.................2 PERCENT.  
MIXING HEIGHT.......INCREASING TO 2000 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 9 MPH.  
 
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........20 20 20 20 5 5 5 5 5 5 11 11  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............40 41 45 49 51 52 53 52 50 47 44 40  
RH..............23 22 19 18 18 20 25 31 39 46 51 49  
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..6 6 6 6 6 5 6 7 8 8 7 6  
20 FT WIND GUST.11 11 11 11 10 9 11 11 13 13 13 11  
EYE LVL WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW  
EYE LVL WND SPD.4 4 4 4 4 4 4 4 6 6 5 4  
EYE LVL WND GST.8 8 8 8 7 7 8 8 9 9 9 8  
RIDGE WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW  
RIDGE WIND SPD..10 10 10 10 10 15 15 15 15 15 15 10  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
   
FORECAST DAYS 3 THROUGH 5
 
   
TUESDAY
 
 
COLDER. PARTLY CLOUDY WITH 20-30% CHANCE OF LIGHT SNOW SHOWERS  
LATE IN THE EVENING. LITTLE TO NO SNOW OR LIQUID ACCUMULATION  
EXPECTED. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S. SOUTHWEST  
WINDS 8-12 MPH. HUMIDITY TRENDING MUCH HIGHER THAN MONDAY.    
WEDNESDAY
 
 
PARTLY CLOUDY. 20-30% CHANCE OF LIGHT SNOW SHOWERS IN THE EARLY  
MORNING, 30-40% CHANCE OF RAIN SHOWERS STARTING IN THE AFTERNOON.  
0.05-0.15" RAIN ACCUMULATION POSSIBLE THROUGH THE DAY. PATCHY FOG  
AND LOW CLOUDS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 40S.  
SOUTHWEST WINDS AROUND 6 MPH.    
THURSDAY
 
 
PARTLY CLOUDY. RAIN (50-90% CHANCE, HIGHEST CHANCES AND HEAVIER  
PRECIPITATION LATER IN THE DAY). 0.8-1.5" RAIN ACCUMULATION  
POSSIBLE THROUGH THE DAY. PATCHY FOG AND LOW CLOUDS. LOWS IN THE  
MID 30S. HIGHS IN THE UPPER 40S. LIGHT WINDS.  
 

 
FORECASTER...CHANDLER PRICE  
REQUESTED BY...DANA BARRE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2502237.5/SGX  
.DELDT 02/09/25  
.FORMATTERVERSION 2.0.0  
.EMAIL SM.FS.CNFECC@USDA.GOV,DANA.BARRE@USDA.GOV  
 
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