FIRE WEATHER OUTLOOK

Fire Weather Planning Forecast For Extreme Southwestern California
National Weather Service San Diego CA
419 AM PDT Tue Aug 4 2020

.DISCUSSION…
A trough of low pressure nearing California will bring a cooling
trend through Thursday with a marine layer near 1500 feet deep
deepening to 2000 to 2500 feet for Wednesday and Thursday, The
trough of low pressure will then weaken with a slow warming trend
into early next week. Lowest daytime humidity in the deserts onto
the lower desert mountain slopes will fall to around 10 percent
each day with gusty southwest to west winds 20 to 30 mph each
afternoon and evening. This will bring a few hours of near
critical conditions each day during the late afternoon.

CAZ255-256-050130-
San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-
419 AM PDT Tue Aug 4 2020

.TODAY…
Sky/weather………Sunny. Areas of smoke in the afternoon.
Max temperature…..76 to 86 above 6000 feet to 81 to 91 below 6000
feet.
24 HR TREND……Down 8 degrees.
Min humidity……..5 to 10 percent on desert slopes to 10 to 15
percent on coastal slopes.
24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 16 mph with gusts to 30 mph.
RIDGETOP………Winds west 7 to 16 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent.
LAL……………..1.

.TONIGHT…
Sky/weather………Clear. Areas of smoke.
Min temperature…..43 to 53 above 6000 feet to 53 to 63 below 6000
feet.
24 HR TREND……Down 3 degrees.
Max humidity……..15 to 20 percent on desert slopes to 35 to 45
percent on coastal slopes.
24 HR TREND……Down 5 percent.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 16 mph becoming south 6 to 12
mph after midnight. Gusts to 30 mph.
RIDGETOP………Winds west 6 to 14 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent.
LAL……………..1.

.WEDNESDAY…
Sky/weather………Sunny.
Max temperature…..71 to 81 above 6000 feet to 84 to 94 below 6000
feet.
24 HR TREND……Down 4 degrees.
Min humidity……..10 to 15 percent.
24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds south 6 to 10 mph with gusts to 20 mph
becoming west 6 to 14 mph with gusts to 30 mph
in the afternoon.
RIDGETOP………Winds west 6 to 12 mph with gusts to 25

FORECAST DAYS 3 THROUGH 7…
SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED

.WEDNESDAY NIGHT…Clear. Lows in the mid 50s. West winds around
8 mph.
.THURSDAY…Not as warm. Sunny. Highs in the upper 70s. West
winds around 7 mph.
.THURSDAY NIGHT…Clear. Lows in the mid 50s. West winds around
6 mph.
.FRIDAY…Sunny. Highs in the upper 70s. West winds around 5 mph.
.FRIDAY NIGHT…Clear. Lows in the upper 50s. West winds around
5 mph.
.SATURDAY…Sunny. Highs in the lower 80s. Light winds.
.SATURDAY NIGHT…Clear. Lows around 60.
.SUNDAY…Sunny. Highs in the mid 80s.
.SUNDAY NIGHT…Clear. Lows around 60.
.MONDAY…Sunny. Highs in the mid 80s.

FORECAST AND TRENDS

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