059
FNUS76 KSGX 211237
FWSSGX
SPOT FORECAST FOR JEFF VALLEY BURN...FOREST SERVICE
NATIONAL WEATHER SERVICE SAN DIEGO CA
437 AM PST WED JAN 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PST ON JANUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
INCREASING CLOUD COVER AND HUMIDITY WILL LEAD TO LOWER TEMPERATURES
IN THE DAY AND HIGHER TEMPERATURES AT NIGHT THROUGH FRIDAY.
WINDS WILL BE GENERALLY LIGHT, BUT INCREASING ONSHORE FRIDAY. CHANCE
OF WETTING RAIN INCREASING THURSDAY INTO FRIDAY, CONTINUING INTO
SATURDAY. DRIER AIR MOVES IN LATE SATURDAY WITH OFFSHORE FLOW
RETURNING SUNDAY MORNING.
TODAY
SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT).
MAX TEMPERATURE.....AROUND 59.
MIN HUMIDITY........28 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
RIDGETOP...........SOUTHEAST AROUND 1 MPH SHIFTING TO THE
SOUTHWEST EARLY IN THE MORNING, THEN SHIFTING
TO THE SOUTH EARLY IN THE MORNING SHIFTING TO
THE SOUTHWEST IN THE LATE MORNING AND EARLY
AFTERNOON SHIFTING TO THE SOUTH.
CWR.................0 PERCENT.
MIXING HEIGHT.......1800 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 3 TO 5 MPH DECREASING TO AROUND 3 MPH
LATE IN THE AFTERNOON.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........63 67 67 67 70 70 70 84 84 84 87 87
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............48 49 50 52 55 57 57 58 57 56 54 50
RH..............29 28 29 29 29 28 28 29 31 35 39 44
20 FT WIND DIR..NE N SW SW S S S S S S S S
20 FT WIND SPD..1 1 1 2 3 3 3 3 3 2 2 2
20 FT WIND GUST.5 4 5 6 7 7 7 8 8 6 6 5
EYE LVL WND DIR.NE N SW SW S S S S S S S S
EYE LVL WND SPD.1 1 1 1 2 2 3 3 3 1 1 1
EYE LVL WND GST.4 3 4 4 5 5 5 6 6 5 4 4
RIDGE WIND DIR..SE SW S S SW S SW SW S SE S SE
RIDGE WIND SPD..0 0 0 0 0 0 0 0 0 0 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT) THEN BECOMING
PARTLY CLOUDY (55-65 PERCENT).
MIN TEMPERATURE.....AROUND 47.
MAX HUMIDITY........46 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
RIDGETOP...........SOUTH 5 TO 10 MPH.
CWR.................2 PERCENT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 3 TO 6 MPH.
TIME (PST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........87 81 81 81 85 85 85 62 62 62 61 61
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............50 49 49 49 49 49 49 48 48 48 48 47
RH..............43 44 41 38 39 40 42 43 43 43 43 43
20 FT WIND DIR..S S S S S S SW SW SW SW SW SW
20 FT WIND SPD..1 1 1 2 2 2 2 2 2 2 2 2
20 FT WIND GUST.5 4 5 5 6 6 6 6 6 6 6 5
EYE LVL WND DIR.S S S S S S SW SW SW SW SW SW
EYE LVL WND SPD.1 1 1 1 1 1 1 1 1 1 1 1
EYE LVL WND GST.4 3 4 4 4 4 4 4 4 4 4 4
RIDGE WIND DIR..SE S S S S S S S S S S S
RIDGE WIND SPD..5 5 5 5 10 10 10 10 10 10 10 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS IN THE LATE MORNING AND AFTERNOON.
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........43 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST AROUND 4 MPH LATE IN
THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 6 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING WEST 5 TO 6 MPH
LATE IN THE AFTERNOON.
RIDGETOP...........SOUTHWEST 5 TO 10 MPH INCREASING TO 10 TO 15
MPH LATE IN THE AFTERNOON.
CWR.................2 PERCENT INCREASING TO 14 PERCENT IN THE LATE
MORNING AND AFTERNOON.
MIXING HEIGHT.......1300 FT AGL.
TRANSPORT WINDS.....SOUTH 3 TO 5 MPH SHIFTING TO THE SOUTHWEST 5 TO
6 MPH IN THE AFTERNOON.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........61 63 63 63 61 61 61 71 71 71 70 70
WEATHER COV..... SCH SCH SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW RW RW
TSTM COV........
TEMP............46 47 48 49 50 51 51 51 50 49 48 47
RH..............45 45 46 46 46 49 52 56 59 63 66 69
20 FT WIND DIR..SW SW SW S S SW SW W W W W W
20 FT WIND SPD..1 1 2 2 3 2 1 1 2 5 6 5
20 FT WIND GUST.5 4 5 6 6 6 4 4 6 8 10 10
EYE LVL WND DIR.SW SW SW S S SW SW W W W W W
EYE LVL WND SPD.1 1 1 1 2 1 1 1 1 3 4 4
EYE LVL WND GST.4 3 4 4 5 4 3 3 4 6 7 7
RIDGE WIND DIR..S S S S S SW SW SW SW SW SW SW
RIDGE WIND SPD..5 10 5 5 10 10 10 10 10 15 15 10
CWR.............0 0 0 0 10 10 10 10 10 10 10 10
FORECAST DAYS 3 THROUGH 5
FRIDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS IN THE LOWER 40S.
HIGHS IN THE UPPER 40S. LIGHT WINDS AT EYE LEVEL.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER 40S. HIGHS IN
THE UPPER 40S. WEST WINDS AROUND 5 MPH AT EYE LEVEL.
SUNDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER 40S.
NORTHEAST WINDS AROUND 7 MPH AT EYE LEVEL.
FORECASTER...MIGUEL MILLER
REQUESTED BY...DANIEL YANEZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2600556.1/SGX
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
.EMAIL SM.FS.CNFECC@USDA.GOV,DANIEL.YANEZ@USDA.GOV,DANA.BARRE@USDA.GOV
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