733  
FNUS76 KSGX 121158  
FWSSGX  
 
SPOT FORECAST FOR FCRD ADMIN PILE BURN PLAN 2021...SBNF LYT  
NATIONAL WEATHER SERVICE SAN DIEGO CA  
458 AM PDT MON APR 12 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON APRIL 12.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
COOL WITH MODERATE HUMIDITY TODAY. LIGHT DOWNCANYON WINDS WILL  
SWITCH TO EAST-SOUTHEAST AND STRENGTHEN AFTER 1000 PDT, THEN  
WEAKEN IN THE EVENING. COOLER WITH HIGHER HUMIDITY AND A SLIGHT  
CHANCE OF RAIN ON TUESDAY. ANY ACCUMULATION WILL BE LIMITED TO A  
FEW HUNDREDTHS OF AN INCH. SOUTHEAST WINDS WILL PREVAIL THROUGH  
THE DAY TUESDAY, INCREASING DURING THE AFTERNOON AND EVENING.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....AROUND 72.  
MIN HUMIDITY........45 PERCENT.  
EYE LEVEL WINDS.....WEST WINDS 2 TO 4 MPH BECOMING EAST-SOUTHEAST  
4 TO 8 MPH.  
WIND (20 FT)........  
SLOPE..............WEST WINDS 3 TO 5 MPH BECOMING EAST-SOUTHEAST  
5 TO 9 MPH WITH GUSTS TO 16 MPH.  
RIDGETOP...........SOUTH 5 TO 10 MPH.  
CWR.................5 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......0-1500 FT AGL...BECOMING 2000-3000 FT AGL IN  
THE AFTERNOON.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH 10 MPH LATE IN THE  
AFTERNOON.  
 
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........12 12 12 12 7 7 7 7 7 7 16  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............55 58 61 64 67 69 70 71 71 72 70  
RH..............52 48 46 47 47 46 46 45 47 46 48  
20 FT WIND DIR..W W W SE SE SE SE SE SE SE SE  
20 FT WIND SPD..2 3 3 6 6 7 9 10 10 10 9  
20 FT WIND GUST.4 5 5 10 12 15 15 16 16 16 15  
EYE LVL WND DIR.W W W SE SE SE SE SE SE SE SE  
EYE LVL WND SPD.1 2 3 3 4 4 5 5 5 5 5  
EYE LVL WND GST.3 4 5 6 7 7 8 8 8 8 9  
RIDGE WIND DIR..N N N S S S S SW SW SW SW  
RIDGE WIND SPD..5 5 5 5 5 5 5 10 10 10 10  
CWR.............0 0 0 0 0 0 0 0 0 0 10  
LAL.............1 1 1 1 1 1 1 1 1 1 1  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....AROUND 47.  
MAX HUMIDITY........90 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS AROUND 4 TO 9 MPH.  
WIND (20 FT)........  
SLOPE..............SOUTH WINDS 4 TO 10 MPH. GUSTS TO 15 MPH.  
RIDGETOP...........WEST 10 TO 15 MPH.  
CWR.................5 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......500-2000 FT AGL.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH...BECOMING AROUND 5 MPH LATE  
IN THE EVENING.  
 
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........16 16 16 16 16 33 33 33 33 33 33 53  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............67 64 60 57 55 53 52 51 50 49 48 47  
RH..............52 58 64 69 73 76 79 81 83 86 89 91  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..8 8 7 5 7 6 6 6 6 6 7 7  
20 FT WIND GUST.15 15 14 12 12 12 12 10 10 10 11 11  
EYE LVL WND DIR.S S S S S S S S S S S S  
EYE LVL WND SPD.5 5 4 4 4 4 4 4 4 4 4 4  
EYE LVL WND GST.9 8 7 7 7 6 6 6 6 6 7 7  
RIDGE WIND DIR..S S S S SW SW SW SW SW W W W  
RIDGE WIND SPD..15 15 15 15 15 15 15 15 15 15 15 15  
CWR.............10 10 10 10 10 10 10 10 10 10 10 10  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY...BECOMING MOSTLY SUNNY. SLIGHT  
CHANCE OF SHOWERS LATE IN THE MORNING.  
MAX TEMPERATURE.....AROUND 61.  
MIN HUMIDITY........65 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS AROUND 4 TO 9 MPH WITH GUSTS TO 15  
MPH.  
WIND (20 FT)........  
SLOPE..............SOUTH WINDS 5 TO 11 MPH WITH GUSTS TO 20 MPH  
BECOMING AROUND 15 MPH WITH GUSTS TO 25 MPH  
LATE IN THE AFTERNOON.  
RIDGETOP...........SOUTHWEST 10 TO 15 MPH...BECOMING 15 TO 20 MPH  
LATE IN THE AFTERNOON.  
CWR.................10 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......500-2000 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH BECOMING SOUTHWEST 10 TO 15  
MPH IN THE AFTERNOON.  
 
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........53 53 53 53 53 39 39 39 39 39 39 19  
WEATHER COV..... SCH SCH SCH SCH SCH SCH  
WEATHER TYPE.... RW RW RW RW RW RW  
TSTM COV........  
TEMP............47 48 48 49 50 52 55 57 60 61 60 60  
RH..............91 91 90 91 91 89 82 75 69 65 66 65  
20 FT WIND DIR..S SE SE SE S S S S S S S S  
20 FT WIND SPD..8 8 8 9 9 10 10 11 11 12 12 13  
20 FT WIND GUST.12 12 12 15 15 18 19 20 22 24 24 25  
EYE LVL WND DIR.S SE SE SE S S S S S S S S  
EYE LVL WND SPD.4 5 5 6 6 7 8 8 8 9 9 9  
EYE LVL WND GST.8 8 8 10 10 12 12 12 12 15 15 15  
RIDGE WIND DIR..W W W W W SW SW SW SW SW SW SW  
RIDGE WIND SPD..15 15 15 15 10 10 15 15 15 20 20 20  
CWR.............10 10 10 10 10 10 10 10 10 10 10 10  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
 

 
FORECASTER...STEFANIE SULLIVAN  
REQUESTED BY...FUELS MANAGEMENT TECHNICIAN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2108633.0/SGX  
.DELDT 04/12/21  
.EMAIL ARTURO.LOZANO@USDA.GOV  
 
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