833  
FNUS76 KSGX 021157  
FWSSGX  
 
SPOT FORECAST FOR BIRCH HILL (EAST)...USFS  
NATIONAL WEATHER SERVICE SAN DIEGO CA  
457 AM PDT WED APR 2 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON APRIL 02.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION  
 
COOL AND HUMID TODAY THROUGH THURSDAY. WINDY TODAY. INCREASING  
CHANCE OF SNOW SHOWERS LATER TODAY INTO THURSDAY, WITH A SLIGHT  
CHANCE OF THUNDERSTORMS. WINDS CALM TONIGHT AND NOT AS STRONG  
THURSDAY. VERY SLIGHT CHANCE OF SHOWERS FRIDAY, BUT WARMER. FAIR,  
DRY AND WARMER SATURDAY AND SUNDAY.  
   
TODAY  
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) THEN BECOMING  
PARTLY CLOUDY (45-55 PERCENT). AREAS OF FOG IN  
THE MORNING. SLIGHT CHANCE OF SNOW SHOWERS IN  
THE MORNING. SLIGHT CHANCE OF SNOW SHOWERS LATE  
IN THE AFTERNOON.  
MAX TEMPERATURE.....AROUND 37.  
MIN HUMIDITY........74 PERCENT.  
EYE LEVEL WINDS.....WEST WINDS 4 TO 8 MPH WITH GUSTS TO AROUND 13  
MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......WEST WINDS 7 TO 12 MPH WITH GUSTS TO AROUND 22  
MPH.  
RIDGETOP...........WEST 25 TO 30 MPH DECREASING TO AROUND 20 MPH  
IN THE LATE MORNING AND AFTERNOON.  
CWR.................14 PERCENT INCREASING TO 21 PERCENT LATE IN THE  
AFTERNOON.  
MIXING HEIGHT.......3300 FT AGL.  
TRANSPORT WINDS.....WEST 18 TO 22 MPH.  
 
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........80 80 42 42 42 48 48 48 54 54 54 61  
WEATHER COV.....ARS ARS ARS ARS ARS SCH  
WEATHER TYPE....FOG FOG FOG FOG FOG SW  
TSTM COV........  
TEMP............33 33 33 32 34 34 36 36 36 37 37 36  
RH..............81 81 80 83 78 77 75 80 81 82 81 82  
20 FT WIND DIR..W W W W W W W W W W W W  
20 FT WIND SPD..12 12 12 12 12 12 10 10 10 12 12 12  
20 FT WIND GUST.18 18 19 21 22 22 20 19 18 18 18 18  
EYE LVL WND DIR.W W W W W W W W W W W W  
EYE LVL WND SPD.8 8 8 8 8 8 7 7 7 8 8 8  
EYE LVL WND GST.13 13 13 13 13 13 13 13 13 13 13 13  
RIDGE WIND DIR..W W W W W NW W W W W W W  
RIDGE WIND SPD..25 25 30 25 20 20 20 20 20 20 20 20  
CWR.............10 10 10 10 10 10 10 10 10 10 10 20  
   
TONIGHT  
 
SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF  
SNOW SHOWERS IN THE EVENING, THEN CHANCE OF  
SNOW SHOWERS LATE IN THE EVENING. AREAS OF FOG  
LATE IN THE EVENING.  
MIN TEMPERATURE.....AROUND 31.  
MAX HUMIDITY........92 PERCENT.  
EYE LEVEL WINDS.....WEST WINDS UP TO 7 MPH. GUSTS UP TO 12 MPH IN  
THE EVENING.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 7 TO 10 MPH. GUSTS UP TO 20 MPH  
IN THE EVENING THEN 12 MPH OVERNIGHT.  
RIDGETOP...........WEST 15 TO 20 MPH.  
CWR.................21 PERCENT INCREASING TO 35 PERCENT LATE IN THE  
EVENING.  
MIXING HEIGHT.......600 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 12 TO 18 MPH.  
 
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........61 61 69 69 69 76 76 76 81 81 81 82  
WEATHER COV.....SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC CHC  
WEATHER TYPE....SW SW SW SW SW SNF SNF SNF SNF SNF SNF SNF  
TSTM COV........  
TEMP............36 35 35 35 35 36 36 36 37 35 34 32  
RH..............81 80 79 77 74 72 71 74 74 76 78 80  
20 FT WIND DIR..W W SW SW SW SW SW SW W W W W  
20 FT WIND SPD..10 10 9 8 8 7 8 8 8 8 7 7  
20 FT WIND GUST.20 19 17 15 14 13 13 14 14 13 12 11  
EYE LVL WND DIR.W W SW SW SW SW SW SW W W W W  
EYE LVL WND SPD.7 7 7 6 6 5 5 6 6 6 5 4  
EYE LVL WND GST.12 12 11 11 10 9 9 10 10 10 9 8  
RIDGE WIND DIR..W W W W W W W W W W W W  
RIDGE WIND SPD..20 15 20 15 15 20 15 15 15 15 15 15  
CWR.............20 20 20 20 20 40 40 40 40 40 40 30  
   
THURSDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) TO PARTLY  
CLOUDY (65-75 PERCENT). AREAS OF FOG IN  
THE MORNING. CHANCE OF SNOW SHOWERS IN THE  
MORNING, THEN SNOW SHOWERS LIKELY AND SLIGHT  
CHANCE OF THUNDERSTORMS LATE IN THE MORNING.  
SLIGHT CHANCE OF SNOW SHOWERS LATE IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 38.  
MIN HUMIDITY........70 PERCENT.  
EYE LEVEL WINDS.....SOUTHWEST WINDS AROUND 4 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 6 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR ANY THUNDERSTORMS.  
RIDGETOP...........SOUTHWEST 10 TO 15 MPH SHIFTING TO THE SOUTH  
AROUND 5 MPH LATE IN THE MORNING, THEN SHIFTING  
TO THE SOUTHWEST LATE IN THE AFTERNOON.  
CWR.................31 PERCENT INCREASING TO 42 PERCENT LATE IN THE  
MORNING, THEN DECREASING TO 14 PERCENT LATE IN  
THE AFTERNOON.  
MIXING HEIGHT.......2200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 7 TO 10 MPH.  
 
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........82 82 78 78 78 66 66 66 73 73 73 68  
WEATHER COV.....CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY SCH  
WEATHER TYPE....SNF SNF SNF SNF SNF SW SW SW SW SW SW SW  
TSTM COV........ SCH SCH SCH SCH SCH SCH  
TEMP............35 34 34 33 33 35 36 36 37 37 37 36  
RH..............81 82 84 91 92 89 90 91 94 95 97 95  
20 FT WIND DIR..SW SW SW SW S S S SW SW SW SW SW  
20 FT WIND SPD..6 6 6 6 5 5 5 5 6 5 5 5  
20 FT WIND GUST.11 11 11 10 10 9 9 10 10 10 9 9  
EYE LVL WND DIR.SW SW SW SW S S S SW SW SW SW SW  
EYE LVL WND SPD.4 4 4 4 4 4 4 4 4 4 4 4  
EYE LVL WND GST.8 8 8 7 7 7 7 7 7 7 7 7  
RIDGE WIND DIR..SW SW SW SW SW S S S S SW SW SW  
RIDGE WIND SPD..15 15 10 10 10 5 5 5 5 5 5 5  
CWR.............30 30 30 30 30 40 40 40 40 40 40 10  
   
FORECAST DAYS 3 THROUGH 5  
   
FRIDAY  
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE MID  
30S. HIGHS IN THE UPPER 40S. NORTHWEST WINDS AROUND 5 MPH.    
SATURDAY  
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 50S. LIGHT  
WINDS.    
SUNDAY  
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 50S. NORTH WINDS  
AROUND 5 MPH.  
 
 
FORECASTER...MIGUEL MILLER  
REQUESTED BY...DANA BARRE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2508597.0/SGX  
.DELDT 04/02/25  
.FORMATTERVERSION 2.0.0  
.EMAIL DANA.BARRE@USDA.GOV,CHRISTOPHER.BRENZEL@USDA.GOV,CLINTON.GREEN@USDA.GOV,SM.FS.CNFECC@USDA.GOV  
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