991
FNUS76 KSGX 201150
FWSSGX
SPOT FORECAST FOR SOUTH BIG BEAR RX...USFS
NATIONAL WEATHER SERVICE SAN DIEGO CA
450 AM PDT MON APR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
INCOMING LOW PRESSURE SYSTEM WILL INCREASE HUMIDITY AND ONSHORE WINDS
TUESDAY, WITH A CHANCE OF SHOWERS AND STRONGEST WINDS TUESDAY EVENING.
MUCH COOLER BUT DRY WEDNESDAY WITH MODERATE HUMIDITY. ONSHORE FLOW
TO WEAKEN A LITTLE FOR WEDNESDAY INTO THE WEEKEND. IT WILL BE A LITTLE
WARMER, BUT HUMIDITY WILL REMAIN MODERATE. THERE IS A VERY SMALL BUT
GROWING CHANCE OF SHOWERS SATURDAY INTO SUNDAY.
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....AROUND 51.
MIN HUMIDITY........41 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 6 MPH. GUSTS UP TO 11 MPH
LATE IN THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 7 TO 8 MPH. GUSTS UP TO 15 MPH
LATE IN THE AFTERNOON.
RIDGETOP...........WEST AROUND 15 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 17 MPH.
TIME (PDT) 9 AM 11 AM 1 PM 3 PM 5 PM
SKY (%).........20 31 31 31 27
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE
TSTM COV........
TEMP............35 42 50 50 49
RH..............58 42 41 42 43
20 FT WIND......SW 7 SW 7 SW 7 SW 8 SW 7
20 FT WIND GUST.12 11 12 13 15
EYE LEVEL WIND..SW 5 SW 4 SW 4 SW 6 SW 6
EYE LVL WND GST.9 8 9 9 11
RIDGETOP WIND...SW 15 SW 15 W 15 W 15 W 15
CWR.............0 0 0 0 0
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....AROUND 30.
MAX HUMIDITY........74 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 5 MPH.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 7 MPH.
RIDGETOP...........
CWR.................0 PERCENT.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........27 27 27 7 7 7
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............47 40 36 34 32 31
RH..............49 68 74 73 71 67
20 FT WIND......SW 7 SW 6 SW 6 SW 6 W 6 W 6
20 FT WIND GUST.13 10 11 11 11 10
EYE LEVEL WIND..SW 5 SW 4 SW 4 SW 4 SW 4 W 4
EYE LVL WND GST.9 7 8 8 8 7
RIDGETOP WIND...M M M M M M
CWR.............0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (0-10 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....AROUND 54.
MIN HUMIDITY........33 PERCENT.
EYE LEVEL WINDS.....WEST WINDS UP TO 6 MPH. GUSTS UP TO 10 MPH LATE
IN THE AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 9 MPH. GUSTS UP TO 14 MPH LATE
IN THE AFTERNOON.
RIDGETOP...........
CWR.................0 PERCENT.
MIXING HEIGHT.......2700 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 13 MPH.
TIME (PDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........4 4 4 10 10 10
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............32 36 45 51 53 53
RH..............62 54 38 33 37 36
20 FT WIND......W 5 W 5 W 5 W 7 W 8 W 8
20 FT WIND GUST.10 8 8 12 14 14
EYE LEVEL WIND..W 4 W 3 W 3 W 5 W 6 W 6
EYE LVL WND GST.7 6 6 9 10 10
RIDGETOP WIND...M M M M M M
CWR.............0 0 0 0 0 0
FORECAST DAYS 3 THROUGH 5
FRIDAY
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE LOWER 50S.
SOUTHWEST WINDS AROUND 7 MPH AT EYE LEVEL.
SATURDAY
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 40S.
SOUTHWEST WINDS AROUND 8 MPH AT EYE LEVEL.
SUNDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE LOWER 30S.
HIGHS IN THE UPPER 40S. SOUTHWEST WINDS AROUND 9 MPH AT EYE LEVEL.
FORECASTER...MIGUEL MILLER
REQUESTED BY...BRIAN GRANT
TYPE OF REQUEST...PRESCRIBED
.TAG 2610675.0/SGX
.DELDT 04/20/26
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.J.PAGE@USDA.GOV,BRIAN.JOHNOSN2@USDA.GOV,BRIAN.GRANT3@USDA.GOV
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