784
FNUS76 KSGX 191552
FWSSGX
SPOT FORECAST FOR LAKE MATHEWS VMP...CAL FIRE RIVERSIDE
NATIONAL WEATHER SERVICE SAN DIEGO CA
852 AM PDT TUE MAY 19 2026
FORECAST IS BASED ON IGNITION TIME OF 0000 PDT ON MAY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A TYPICAL DIURNAL WIND PATTERN THIS WEEK WITH LIGHT WINDS AT
NIGHT AND WEST TO NORTHWEST SEABREEZE WINDS EACH AFTERNOON. 20
FOOT GUSTS MAY REACH 15-20 MPH EACH AFTERNOON. AS FLOW TURNS BACK
TO WEAKLY ONSHORE, RELATIVE HUMIDITY SHOULD SLOWLY INCREASE
THROUGH THE WEEK ALONG WITH A DEEPENING MARINE LAYER. CHANCE OF
MORNING LOW CLOUDS AND FOG STARTING THURSDAY.
REST OF TONIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........47 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
RIDGETOP...........NORTHWEST 5 TO 10 MPH SHIFTING TO THE NORTH
OVERNIGHT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 3 TO 5 MPH.
CWR.................0 PERCENT.
TIME (PDT) MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 4 4 4 4 6
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............63 62 60 58 58 57
RH..............39 41 44 45 46 47
20 FT WIND DIR..S S S SE SE SE
20 FT WIND SPD..3 3 3 2 2 1
20 FT WIND GUST.7 7 6 6 5 4
EYE LVL WND DIR.S S S SE SE SE
EYE LVL WND SPD.2 2 2 1 1 1
EYE LVL WND GST.5 5 5 4 4 3
CWR.............0 0 0 0 0 0
WEDNESDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........18 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST UP TO 6 MPH WITH
GUSTS TO AROUND 9 MPH IN THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST UP TO 12 MPH WITH
GUSTS TO AROUND 18 MPH IN THE AFTERNOON.
RIDGETOP...........NORTH 10 TO 15 MPH SHIFTING TO THE NORTHWEST AND
DECREASING TO AROUND 5 MPH EARLY IN THE AFTERNOON.
MIXING HEIGHT.......10200 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 1 TO 3 MPH SHIFTING TO THE WEST
AROUND 14 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........6 6 8 8 8 5 5 5 2 2 2 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............58 60 63 69 73 77 80 81 82 83 82 81
RH..............47 44 40 32 26 22 19 18 18 18 21 23
20 FT WIND DIR..SE N SE E N N NW NW NW NW W W
20 FT WIND SPD..1 1 1 1 2 3 5 6 8 9 12 12
20 FT WIND GUST.2 2 2 4 6 7 10 11 13 15 18 18
EYE LVL WND DIR.SE SE SE E N N NW NW NW NW W W
EYE LVL WND SPD.1 1 1 1 1 2 3 3 4 5 6 6
EYE LVL WND GST. 2 3 4 5 6 7 8 9 9
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-30 PERCENT).
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........70 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 5 MPH WITH GUSTS TO
AROUND 8 MPH EARLY IN THE EVENING BECOMING
LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS UP TO 9 MPH WITH GUSTS TO
AROUND 16 MPH EARLY IN THE EVENING BECOMING
LIGHT.
RIDGETOP............WEST 10 TO 15 MPH BECOMING NORTHWEST 0 TO 5 MPH
OVERNIGHT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....WEST 7 TO 13 MPH SHIFTING TO THE SOUTHEAST 2 TO
5 MPH IN THE LATE EVENING AND OVERNIGHT.
CWR.................0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........3 3 3 3 3 21 21 21 21 21 21 35
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............80 76 72 69 67 64 62 61 60 58 57 57
RH..............25 28 32 37 41 45 49 52 55 59 62 70
20 FT WIND DIR..W NW NW NW N NE N N N N NE NE
20 FT WIND SPD..9 7 5 3 3 2 2 2 1 1 1 1
20 FT WIND GUST.16 12 9 7 6 6 6 5 5 5 4 4
EYE LVL WND DIR.W NW NW NW N NE N N N N NE NE
EYE LVL WND SPD.5 4 3 2 2 1 1 1 1 1 1 1
EYE LVL WND GST.8 6 5 4 3 3 3 3 3 3 2 2
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY SUNNY (0-10 PERCENT). PATCHY FOG IN THE
MORNING.
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........32 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHWEST UP TO 7 MPH WITH
GUSTS TO AROUND 10 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING NORTHWEST 8 TO 13 MPH WITH
GUSTS TO AROUND 20 MPH IN THE AFTERNOON.
RIDGETOP............WEST AROUND 0 MPH INCREASING TO AROUND 10 MPH.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 1 MPH SHIFTING TO THE WEST
6 TO 13 MPH LATE IN THE MORNING.
CWR.................0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........37 37 37 37 37 7 7 7 7 7 7 4
WEATHER COV.....PTY PTY PTY PTY PTY
WEATHER TYPE....FOG FOG FOG FOG FOG
TSTM COV........
TEMP............58 59 62 66 70 74 77 78 79 80 80 78
RH..............64 61 56 49 42 37 34 33 33 32 32 33
20 FT WIND DIR..NE NE N N NW NW NW NW NW NW NW NW
20 FT WIND SPD..1 1 1 2 3 5 6 8 9 10 12 13
20 FT WIND GUST.4 4 5 6 6 8 11 13 15 18 20 20
EYE LVL WND DIR.NE NE N N NW NW NW NW NW NW NW NW
EYE LVL WND SPD.1 1 1 1 2 3 3 4 5 5 6 7
EYE LVL WND GST.2 2 3 3 3 4 6 7 8 9 10 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...KYLE WHEELER
REQUESTED BY...DUTY OFFICER
TYPE OF REQUEST...PRESCRIBED
.TAG 2614030.0/SGX
.DELDT 05/19/26
.FORMATTERVERSION 2.0.0
.EMAIL RRUECCCAPTAINS@GMAIL.COM
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