602
FNUS76 KSGX 180702
FWSSGX
SPOT FORECAST FOR UPPER BALDY...USFS
NATIONAL WEATHER SERVICE SAN DIEGO CA
1102 PM PST WED DEC 17 2025
FORECAST IS BASED ON IGNITION TIME OF 1900 PST ON DECEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DISCUSSION
OFFSHORE FLOW WILL CONTINUE TO BRING EPISODES OF GUSTY NORTHERLY
WINDS OVERNIGHT, BUT WITH A GRADUAL DECREASE AFTER 2 AM THROUGH
THE MORNING. HUMIDITY WILL ALSO FLUCTUATE PROPORTIONAL TO THE
WINDS, BUT EVENTUALLY RECOVERING MODERATELY WELL TOWARD SUNRISE.
SLOPES WILL REMAIN MUCH WARMER WITH LOWER HUMIDITY THAN THE CANYON
FLOOR. A GRADUAL TRANSITION TO ONSHORE FLOW WILL TAKE PLACE
THURSDAY AFTERNOON THROUGH FRIDAY, BRINGING COOLER WEATHER AND
SLIGHTLY HIGHER HUMIDITY.
TONIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....AROUND 49.
MAX HUMIDITY........42 PERCENT TOWARD SUNRISE.
EYE LEVEL WINDS.....NORTH WINDS UP TO 8 MPH WITH GUSTS TO
AROUND 13 MPH IN THE LATE EVENING AND
OVERNIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS 4 TO 12 MPH WITH GUSTS TO AROUND 18
MPH BECOMING 3 TO 8 MPH WITH GUSTS TO 12 MPH.
RIDGETOP...........NORTH 15 TO 25 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTH 13 TO 22 MPH DECREASING TO 10 TO 12 MPH
OVERNIGHT.
TIME (PST) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........7 7 7 2 2 2 1 1 1 5 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............56 55 54 56 55 54 53 53 51 54 54
RH..............35 32 31 25 26 28 28 29 31 27 28
20 FT WIND DIR..N N N N N N N N N N N
20 FT WIND SPD..20 16 12 9 12 8 9 9 9 6 5
20 FT WIND GUST.29 25 20 15 18 15 15 15 15 11 9
EYE LVL WND DIR.N N N N N N N N N N N
EYE LVL WND SPD.14 11 9 6 8 6 6 7 6 4 4
EYE LVL WND GST.21 18 14 11 13 11 11 11 11 8 7
RIDGE WIND DIR..N N N N N N N N N N N
RIDGE WIND SPD..25 15 15 25 15 15 20 15 15 25 20
CWR.............0 0 0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........17 PERCENT.
EYE LEVEL WINDS.....NORTH WINDS AROUND 4 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING NORTHWEST AROUND
4 MPH IN THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS AROUND 5 MPH INCREASING TO AROUND 6
MPH EARLY IN THE MORNING, THEN BECOMING LIGHT
EARLY IN THE MORNING BECOMING WEST 5 TO 6 MPH
IN THE AFTERNOON.
RIDGETOP...........NORTHWEST 15 TO 20 MPH DECREASING TO 10 TO 15
MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......1400 FT AGL.
TRANSPORT WINDS.....NORTHWEST 6 TO 10 MPH.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 15 15 15 25 25 25 16 16 16 11 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............56 56 57 60 64 69 71 72 72 70 67 63
RH..............25 23 22 21 20 17 17 18 20 23 25 32
20 FT WIND DIR..N N NW NW NW NW W W W W NW NW
20 FT WIND SPD..5 6 2 2 2 2 5 5 5 6 5 5
20 FT WIND GUST.10 11 6 5 6 6 8 9 9 11 8 9
EYE LVL WND DIR.N N NW NW NW NW W W W W NW NW
EYE LVL WND SPD.4 4 1 1 2 1 3 3 4 4 3 4
EYE LVL WND GST.7 8 5 4 5 4 6 7 7 8 6 7
RIDGE WIND DIR..N N NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..20 20 15 15 15 15 15 15 10 10 15 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........33 PERCENT.
EYE LEVEL WINDS.....WEST WINDS AROUND 4 MPH.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 6 MPH.
RIDGETOP...........WEST 10 TO 15 MPH INCREASING TO AROUND 20 MPH
AFTER 3 AM, THEN DECREASING TO AROUND 10 MPH
EARLY IN THE MORNING.
CWR.................0 PERCENT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....WEST 6 TO 8 MPH.
TIME (PST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........11 11 11 11 13 13 13 10 10 10 7 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............60 59 59 58 57 56 56 55 55 55 53 52
RH..............32 30 27 27 26 26 27 28 26 27 27 28
20 FT WIND DIR..NW NW NW NW W W W W W W W W
20 FT WIND SPD..6 6 6 5 5 5 5 6 6 6 5 5
20 FT WIND GUST.10 10 10 10 9 9 10 10 10 10 10 10
EYE LVL WND DIR.NW NW NW NW W W W W W W W W
EYE LVL WND SPD.4 4 4 4 4 4 4 4 4 4 4 4
EYE LVL WND GST.7 7 7 7 7 7 7 7 7 7 7 7
RIDGE WIND DIR..NW NW NW W W W W W W W W W
RIDGE WIND SPD..10 15 10 10 15 10 10 15 10 10 20 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........27 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 9 MPH. GUSTS UP TO 13 MPH LATE
IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 12 MPH. GUSTS UP TO 18 MPH LATE
IN THE MORNING.
RIDGETOP...........WEST 10 TO 15 MPH INCREASING TO AROUND 35 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......1100 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 9 MPH SHIFTING TO THE NORTH AROUND 0
MPH LATE IN THE MORNING, THEN INCREASING TO
WEST 7 TO 15 MPH LATE IN THE MORNING.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 17 17 17 29 29 29 25 25 25 14 14
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............52 51 53 56 60 62 63 64 63 61 59 56
RH..............28 28 32 32 30 30 29 30 31 33 35 37
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..5 6 6 7 8 8 9 10 12 12 12 9
20 FT WIND GUST.10 10 11 11 13 15 16 17 18 18 18 16
EYE LVL WND DIR.W W W W W W W W W W W W
EYE LVL WND SPD.4 4 4 4 5 6 7 7 8 9 8 7
EYE LVL WND GST.7 7 8 8 9 11 12 12 13 13 13 12
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..10 15 15 15 25 30 30 30 35 35 35 35
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...MIGUEL MILLER
REQUESTED BY...ART LOZANO
TYPE OF REQUEST...PRESCRIBED
.TAG 2527625.4/SGX
.DELDT 12/17/25
.FORMATTERVERSION 2.0.0
.EMAIL ARTURO.LOZANO@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page