467
FNUS76 KSGX 160135
FWSSGX
SPOT FORECAST FOR THORN INCIDENT...CAL FIRE
NATIONAL WEATHER SERVICE SAN DIEGO CA
635 PM PDT WED JUL 15 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 PDT ON JULY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HOT CONDITIONS WILL CONTINUE THROUGH THURSDAY WITH AN EXTREME
HEAT WARNING IN EFFECT FOR THE AREA. OVERNIGHT LOWS ARE ONLY
EXPECTED TO FALL 75 TO 80 DEGREES. WINDS WILL FOLLOW A DIURNAL
PATTERN BECOMING LIGHT AND VARIABLE OVERNIGHT AND INCREASING IN
THE LATE AFTERNOON WITH WINDS PEAKING 4-6 PM, WEAKENING AFTER 7
PM. RELATIVE HUMIDITY IS EXPECTED TO INCREASE THURSDAY AND FRIDAY
DUE TO AN INFLUX OF MOISTURE WHICH WILL ALSO INCREASE OUR CHANCES
FOR SHOWERS AND THUNDERSTORMS. ANY THUNDERSTORMS THAT DEVELOP WILL
HAVE LOCALLY HEAVY RAIN, ERRATIC WINDS, AND LIGHTNING. FRIDAY HAS THE
HIGHEST CHANCES OF WETTING RAIN.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....AROUND 76.
MAX HUMIDITY........43 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 4 MPH WITH GUSTS TO AROUND 8
MPH IN THE EVENING BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS UP 8 MPH WITH GUSTS TO AROUND 15
MPH IN THE EVENING BECOMING LIGHT.
RIDGETOP...........WEST 5 TO 10 MPH EARLY IN THE EVENING, THEN SHIFTING
TO THE SOUTHEAST OVERNIGHT.
CWR.................1 PERCENT.
MIXING HEIGHT.......200 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 16 MPH WEAKENING AND SHIFTING TO THE
EAST 5 TO 6 MPH AFTER 3 AM.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........13 13 3 3 3 4 4 4 13 13 13 25
TEMP............89 87 83 81 81 82 83 83 83 82 82 82
RH..............30 32 37 40 38 37 35 35 35 36 34 33
20 FT WIND DIR..W W W W W W W W SE SE SE SE
20 FT WIND SPD..8 7 7 7 7 5 3 3 2 2 2 1
20 FT WIND GUST.15 13 12 11 10 8 7 6 6 5 5 5
EYE LVL WND DIR.W W W W W W W W SE SE SE SE
EYE LVL WND SPD.4 3 3 3 3 2 1 1 1 1 1 1
EYE LVL WND GST.8 6 6 6 6 5 5 5 4 4 4 4
RIDGE WIND DIR..W W W W W W W W SE SE SE SE
RIDGE WIND SPD..15 15 5 10 10 5 0 0 10 5 0 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE MORNING.
MAX TEMPERATURE.....AROUND 91.
MIN HUMIDITY........32 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHEAST AROUND 4 MPH
LATE IN THE MORNING, THEN SHIFTING TO THE
SOUTHWEST WITH GUSTS TO AROUND 8 MPH IN THE
AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS IN THE MORNING, SHIFTING TO THE WEST 7 TO 9
MPH WITH GUSTS TO AROUND 16 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
RIDGETOP...........SOUTHEAST AROUND 5 MPH SHIFTING TO THE WEST
LATE IN THE AFTERNOON.
CWR.................1 PERCENT INCREASING TO 14 PERCENT LATE IN THE
MORNING, THEN DECREASING TO 4 PERCENT LATE IN
THE AFTERNOON.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH SHIFTING TO THE
SOUTHEAST LATE IN THE MORNING, THEN SHIFTING TO
THE SOUTHWEST 9 TO 15 MPH IN THE AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........25 25 15 15 15 44 44 44 44 44 44 52
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH SCH
TEMP............79 82 82 83 86 87 88 88 88 89 87 86
RH..............37 35 34 34 32 32 32 33 34 34 36 37
20 FT WIND DIR..NE NE E E E E SE S SW W W W
20 FT WIND SPD..1 1 1 2 3 5 6 6 6 7 8 9
20 FT WIND GUST.4 4 4 6 8 11 13 13 14 15 16 16
EYE LVL WND DIR.NE NE E E E E SE S SW W W W
EYE LVL WND SPD.1 1 1 1 1 3 3 3 3 5 6 6
EYE LVL WND GST.3 3 3 4 4 4 5 5 6 8 8 8
RIDGE WIND DIR..NE NE E E E E SE S SW W W W
RIDGE WIND SPD..5 5 5 5 5 5 5 5 5 5 5 10
CWR.............0 0 0 0 0 10 10 10 10 10 10 0
THURSDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT).
MIN TEMPERATURE.....AROUND 73.
MAX HUMIDITY........52 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 4 MPH WITH GUSTS TO AROUND 7
MPH IN THE EVENING BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS UP TO 7 MPH WITH GUSTS TO AROUND 15
MPH IN THE EVENING BECOMING LIGHT.
RIDGETOP...........
CWR.................4 PERCENT.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST 7 TO 16 MPH BECOMING LIGHT OVERNIGHT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........52 52 52 52 52 57 57 57 57 57 57 68
TEMP............85 82 80 78 78 79 80 80 78 79 78 76
RH..............38 42 47 52 50 45 45 45 48 48 47 50
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..8 7 6 5 5 3 2 2 2 2 1 1
20 FT WIND GUST.15 13 12 10 8 7 6 6 5 5 5 4
EYE LVL WND DIR.W W W W W W W W W W W W
EYE LVL WND SPD.6 5 4 4 3 2 1 1 1 1 1 1
EYE LVL WND GST.8 7 7 7 6 5 5 4 4 4 4 3
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS LATE
IN THE MORNING.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........45 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST UP TO 5 MPH WITH
GUSTS TO AROUND 8 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST 5 TO 9
MPH WITH GUSTS TO AROUND 16 MPH LATE IN THE
MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE MORNING.
CWR.................1 PERCENT INCREASING TO 16 PERCENT LATE IN THE
MORNING, THEN DECREASING TO 2 PERCENT LATE IN
THE AFTERNOON.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 13 MPH.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........68 68 68 68 68 51 51 51 51 51 51 41
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH SCH
TEMP............78 77 76 77 78 80 81 82 82 82 81 80
RH..............48 49 50 49 47 45 45 46 47 48 49 51
20 FT WIND DIR..W W SW SW SW S SW SW SW SW W W
20 FT WIND SPD..1 1 1 2 3 5 6 6 6 7 8 9
20 FT WIND GUST.4 4 5 6 8 11 12 13 14 15 15 16
EYE LVL WND DIR.W W SW SW SW S SW SW SW SW W W
EYE LVL WND SPD.1 1 1 1 3 4 4 4 4 5 6 6
EYE LVL WND GST.3 3 4 5 6 6 6 6 7 7 8 8
CWR.............0 0 0 0 0 20 20 20 20 20 20 0
FORECASTER...CASEY OSWANT
REQUESTED BY...JOHN CLARK
TYPE OF REQUEST...WILDFIRE
.TAG 2617441.0/SGX
.DELDT 07/15/26
.FORMATTERVERSION 2.0.0
.EMAIL JOHN.CLARK@FIRE.CA.GOV
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