613
FNUS76 KSGX 182258
FWSSGX
SPOT FORECAST FOR MATEO...USDA FOREST SERVICE
NATIONAL WEATHER SERVICE SAN DIEGO CA
358 PM PDT THU JUN 18 2026
FORECAST IS BASED ON FORECAST START TIME OF 1739 PDT ON JUNE 18.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WEAK ONSHORE FLOW AND A DOMINANT MARINE LAYER WILL KEEP WEATHER
CONDITIONS SEASONAL THROUGH THE WEEKEND. HUMIDITY WILL REMAIN MODEST
AND SEA BREEZES TYPICAL.
REST OF TODAY
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........65 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS AROUND 4 MPH.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 6 TO 9 MPH. GUSTS TO 15 MPH.
RIDGETOP...........WEST AROUND 5 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......1500 FT AGL.
TRANSPORT WINDS.....WEST AROUND 8 MPH.
TIME (PDT) 5PM
SKY (%).........26
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............71
RH..............66
20 FT WIND DIR..W
20 FT WIND SPD..7
20 FT WIND GUST.15
EYE LVL WND DIR.W
EYE LVL WND SPD.4
EYE LVL WND GST.8
RIDGE WIND DIR..W
RIDGE WIND SPD..5
CWR.............0
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
CLOUDY (95-100 PERCENT). PATCHY FOG.
MIN TEMPERATURE.....AROUND 61.
MAX HUMIDITY........88 PERCENT.
EYE LEVEL WINDS.....WEST WINDS AROUND 4 MPH EARLY IN THE EVENING
BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........WEST AROUND 10 MPH SHIFTING TO THE NORTHWEST
EARLY IN THE EVENING, THEN BECOMING LIGHT.
CWR.................1 PERCENT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....WEST 2 TO 8 MPH.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........26 26 68 68 68 88 88 88 69 69 69 99
WEATHER COV..... PTY PTY PTY PTY PTY PTY
WEATHER TYPE.... FOG FOG FOG FOG FOG FOG
TSTM COV........
TEMP............70 66 65 64 64 64 63 63 63 62 62 62
RH..............69 76 78 82 85 86 87 87 86 86 86 86
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..6 6 5 5 3 3 2 2 2 1 1 2
20 FT WIND GUST.10 10 9 9 7 6 6 5 5 5 5 5
EYE LVL WND DIR.W W W W W W W W W W W W
EYE LVL WND SPD.4 4 4 4 2 2 1 1 1 1 1 1
EYE LVL WND GST.7 7 7 7 5 5 4 4 4 4 4 4
RIDGE WIND DIR..W W N NW NW NE NW W S W W SW
RIDGE WIND SPD..10 10 5 10 5 0 5 5 5 5 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
JUNETEENTH (FRIDAY)
SKY/WEATHER.........CLOUDY (85-95 PERCENT) THEN BECOMING MOSTLY
SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........62 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST UP TO 5 MPH LATE IN
THE MORNING. GUSTS TO 10 MPH IN THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 8 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING WEST 6 TO 8 MPH
LATE IN THE MORNING. GUSTS TO 16 MPH IN THE
AFTERNOON.
RIDGETOP...........WEST AROUND 5 MPH INCREASING TO AROUND 10 MPH
LATE IN THE AFTERNOON.
CWR.................1 PERCENT.
MIXING HEIGHT.......1900 FT AGL.
TRANSPORT WINDS.....WEST 1 TO 10 MPH INCREASING TO AROUND 10 MPH
LATE IN THE AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........99 99 80 80 80 17 17 17 11 11 11 22
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............56 57 59 61 66 69 71 72 73 73 72 71
RH..............97 96 93 86 74 68 66 64 63 63 64 65
20 FT WIND DIR..W W W W SW W W W W W W W
20 FT WIND SPD..1 1 1 2 3 6 7 7 8 8 8 7
20 FT WIND GUST.5 5 5 6 7 10 11 12 14 15 15 14
EYE LVL WND DIR.W W W W SW W W W W W W W
EYE LVL WND SPD.1 1 1 1 2 4 4 5 5 5 5 5
EYE LVL WND GST.4 4 4 4 5 7 8 9 9 9 9 9
RIDGE WIND DIR..SW SW W W W W 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...MIGUEL MILLER
REQUESTED BY...LISA BARRE
TYPE OF REQUEST...WILDFIRE
.TAG 2615585.1/SGX
.DELDT 06/18/26
.FORMATTERVERSION 2.0.0
.EMAIL SM.FS.CNFECC@USDA.GOV
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