684
FNUS76 KSGX 150427
FWSSGX
SPOT FORECAST FOR GRAND...CAL FIRE
NATIONAL WEATHER SERVICE SAN DIEGO CA
927 PM PDT THU MAY 14 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 PDT ON MAY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A FAIRLY DEEP MARINE LAYER WILL BRING LOW CLOUDS AND PATCHY FOG
(ESPECIALLY INTO THE TERRAIN) IN THE LATE OVERNIGHT/EARLY MORNING
HOURS, BUT ALSO EXCELLENT MOISTURE RECOVERY TO 95-100% PERCENT.
RELATIVELY LIGHT WINDS IN THE OVERNIGHT PERIODS WITH BREEZY
ONSHORE WINDS IN THE LATE MORNING THROUGH THE AFTERNOON HOURS.
20FT GUSTS UP TO 15 MPH ON FRIDAY, CLOSER TO 15-20 MPH FOR
SATURDAY AFTERNOON. RELATIVE HUMIDITY BOTTOMS OUT AROUND 60-65
PERCENT IN THE AFTERNOONS.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
MOSTLY SUNNY (5-15 PERCENT). PATCHY FOG IN THE
MORNING.
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........60 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST UP TO 6 MPH WITH
GUSTS TO AROUND 11 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 8 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTHWEST 5 TO 8
MPH WITH GUSTS TO AROUND 15 MPH LATE IN THE
MORNING.
RIDGETOP...........WEST AROUND 10 MPH.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........78 70 70 70 17 17 17 6 6 6 4
WEATHER COV.....PTY PTY PTY PTY
WEATHER TYPE....FOG FOG FOG FOG
TSTM COV........
TEMP............56 57 60 63 65 70 71 72 73 72 71
RH..............100 98 91 84 77 67 63 62 60 63 65
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..2 1 2 3 5 6 6 7 8 8 8
20 FT WIND GUST.4 4 4 6 8 11 13 14 15 15 15
EYE LVL WND DIR.SW S S SW W SW W SW SW SW SW
EYE LVL WND SPD.1 1 1 1 3 4 4 5 5 5 6
EYE LVL WND GST.3 3 3 4 6 8 9 10 11 11 11
RIDGE WIND DIR..W W W W W W W W W W W
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10
FRIDAY NIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT) THEN BECOMING PARTLY
CLOUDY (30-40 PERCENT) THEN BECOMING MOSTLY
CLOUDY (70-80 PERCENT). PATCHY FOG LATE IN THE
EVENING.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........100 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 6 MPH WITH GUSTS TO
AROUND 11 MPH IN THE EVENING AND OVERNIGHT
BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 8 MPH WITH GUSTS TO AROUND
15 MPH IN THE EVENING AND OVERNIGHT BECOMING
LIGHT.
RIDGETOP...........WEST 10 TO 15 MPH SHIFTING TO THE NORTHWEST
AROUND 20 MPH AFTER 3 AM.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 4 6 6 6 35 35 35 72 72 72 81
WEATHER COV..... PTY PTY PTY PTY PTY PTY
WEATHER TYPE.... FOG FOG FOG FOG FOG FOG
TSTM COV........
TEMP............70 67 64 61 60 59 58 57 56 56 55 55
RH..............68 75 81 86 91 94 95 98 100 100 100 100
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..8 8 8 7 6 5 5 5 5 5 3 3
20 FT WIND GUST.15 15 14 13 10 8 6 6 6 6 6 5
EYE LVL WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
EYE LVL WND SPD.6 6 6 6 5 4 4 3 2 2 2 2
EYE LVL WND GST.11 11 10 9 7 6 5 4 4 4 4 4
RIDGE WIND DIR..W W W W W W W W W W NW NW
RIDGE WIND SPD..10 10 10 10 10 10 10 15 15 15 20 20
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) THEN BECOMING
MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........63 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST UP TO 6 MPH WITH
GUSTS TO AROUND 13 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 9 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTHWEST 5 TO 9
MPH WITH GUSTS TO AROUND 18 MPH LATE IN THE
MORNING.
RIDGETOP...........NORTHWEST 15 TO 20 MPH SHIFTING TO THE WEST 10
TO 15 MPH IN THE LATE MORNING AND AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........81 81 74 74 74 17 17 17 12 12 12 24
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............56 56 57 59 62 65 69 70 71 71 70 69
RH..............100 100 100 98 89 81 71 67 65 63 66 68
20 FT WIND DIR..SW SW W W W W W SW SW SW SW SW
20 FT WIND SPD..3 3 2 3 3 5 7 8 9 9 9 9
20 FT WIND GUST.5 4 4 5 8 11 15 16 17 18 17 16
EYE LVL WND DIR.SW SW SW W W W W W SW SW SW SW
EYE LVL WND SPD.2 1 1 1 2 4 4 5 6 6 6 6
EYE LVL WND GST.4 3 3 4 6 8 11 12 12 13 12 12
RIDGE WIND DIR..NW NW NW NW NW NW W W W W W W
RIDGE WIND SPD..20 15 15 10 10 10 10 10 15 15 10 10
FORECASTER...DAVID MUNYAN
REQUESTED BY...MANNY BARRIGA
TYPE OF REQUEST...WILDFIRE
.TAG 2613697.0/SGX
.DELDT 05/14/26
.FORMATTERVERSION 2.0.0
.EMAIL MANUEL.BARRIGA@FIRE.CA.GOV
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