096
FNUS76 KSGX 140356
FWSSGX
SPOT FORECAST FOR GRAND...CALFIRE
NATIONAL WEATHER SERVICE SAN DIEGO CA
856 PM PDT WED MAY 13 2026
FORECAST IS BASED ON FORECAST START TIME OF 2100 PDT ON MAY 13.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
LOW CLOUDS AND PATCHY FOG IN THE MORNING TO YIELD TO SUNNY SKIES
AND A SEA BREEZE (WEST 8-14 MPH) IN THE AFTERNOON. HUMIDITY
AROUND 90-100% WILL DROP DOWN TO 50-60% DURING THE DAYTIME AS
TEMPERATURES REACH INTO THE MID-70S. HUMIDITY RECOVERS BACK TO
NEAR 100% OVERNIGHT INTO EARLY FRIDAY.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). PATCHY FOG
OVERNIGHT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........97 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS AROUND 4 MPH IN THE LATE
EVENING AND OVERNIGHT BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 6 MPH IN THE LATE EVENING
AND OVERNIGHT BECOMING LIGHT.
RIDGETOP...........WEST AROUND 5 MPH SHIFTING TO THE NORTHWEST
EARLY IN THE MORNING.
CWR.................0 PERCENT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 3 TO 9 MPH.
TIME (PDT) 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........1 1 0 0 0 12 12 12 49
WEATHER COV..... PTY PTY PTY PTY
WEATHER TYPE.... FOG FOG FOG FOG
TSTM COV........
TEMP............62 60 59 58 57 56 56 55 55
RH..............77 82 84 88 91 95 97 97 96
20 FT WIND DIR..W W SW SW SW SW SW W W
20 FT WIND SPD..7 6 5 5 5 3 3 2 2
20 FT WIND GUST.11 9 7 7 7 7 7 7 6
EYE LVL WND DIR.W W SW SW SW SW SW SW SW
EYE LVL WND SPD.4 4 2 2 2 2 2 2 1
EYE LVL WND GST.8 7 5 5 5 5 5 5 5
RIDGE WIND DIR..W W W W W NW W NW NW
RIDGE WIND SPD..5 5 5 5 5 5 5 5 5
CWR.............0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
SUNNY (0-10 PERCENT). PATCHY FOG IN THE
MORNING.
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........56 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST UP TO 6 MPH.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 8 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTHWEST 8 TO 14
MPH IN THE AFTERNOON.
RIDGETOP...........WEST 0 TO 5 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 2 TO 10 MPH INCREASING TO AROUND 12
MPH LATE IN THE AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........49 49 32 32 32 4 4 4 2 2 2 2
WEATHER COV.....PTY PTY PTY PTY PTY
WEATHER TYPE....FOG FOG FOG FOG FOG
TSTM COV........
TEMP............56 56 57 61 63 66 70 72 73 74 73 72
RH..............97 97 96 88 80 71 62 59 57 56 58 60
20 FT WIND DIR..W SW S SW W W W W SW SW SW SW
20 FT WIND SPD..1 1 1 1 2 3 5 6 7 8 8 8
20 FT WIND GUST.6 5 6 7 9 10 11 12 13 13
EYE LVL WND DIR.SW SW S SW SW SW SW SW SW SW SW SW
EYE LVL WND SPD.1 1 1 1 1 2 4 4 4 5 6 6
EYE LVL WND GST.5 4 4 5 7 7 8 9 9 9
RIDGE WIND DIR..W W NW W W NW NW W W W NW NW
RIDGE WIND SPD..5 5 0 5 5 0 0 0 0 0 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). PATCHY FOG EARLY
IN THE MORNING.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........97 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 5 MPH IN THE EVENING AND
OVERNIGHT BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 8 MPH IN THE EVENING AND
OVERNIGHT BECOMING LIGHT.
RIDGETOP...........NORTHWEST 5 TO 10 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 3 TO 12 MPH.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........2 2 1 1 1 14 14 14 49 49 49 75
WEATHER COV..... PTY
WEATHER TYPE.... FOG
TSTM COV........
TEMP............71 68 65 63 61 60 59 58 57 57 57 56
RH..............63 69 74 79 85 88 90 94 97 97 97 96
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..8 8 7 7 6 5 5 5 3 3 3 3
20 FT WIND GUST.13 12 11 11 9 6 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.5 5 4 4 4 2 2 1 1 1 1 1
EYE LVL WND GST.9 9 8 8 7 5 5 5 5 5 4 4
RIDGE WIND DIR..NW NW NW NW NW NW W W W W W W
RIDGE WIND SPD..5 5 5 5 5 5 5 5 5 5 5 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...SEBASTIAN WESTERINK
REQUESTED BY...MANNY BARRIGA
TYPE OF REQUEST...WILDFIRE
.TAG 2613622.0/SGX
.DELDT 05/13/26
.FORMATTERVERSION 2.0.0
.EMAIL MANUEL.BARRIGA@FIRE.CA.GOV,BDUECCSTAFF@FIRE.CA.GOV,JASON.MAHAN@FIRE.CA.GOV
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