Fire Weather Discussion

Fire Weather Planning Forecast For Extreme Southwestern California
National Weather Service San Diego CA
256 AM PDT Sat Sep 25 2021

.DISCUSSION…
Scattered showers and isolated thunderstorms are expected at times
into Sunday as a weak storm system moves across northwest Mexico.
The best chance for heavy rainfall will be near the mountains,
but some showers could make it farther west today as well.
Relative humidity will be elevated through early next week and it
will gradually cool as the marine layer deepens and and onshore
flow increases. Stronger and gusty westerly winds are expected
over the mountains and deserts on Tuesday.

Fire Weather Forecast for CAZ255
CAZ255-256-260000-
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-
256 AM PDT Sat Sep 25 2021

.TODAY…
Sky/weather………Partly cloudy. Slight chance of showers in the
morning, then chance of showers and
thunderstorms in the afternoon.
Max temperature…..65 to 75 above 6000 feet to 73 to 82 below 6000
feet.
24 HR TREND……Down 1 degree.
Min humidity……..25 to 35 percent on desert slopes to 35 to 45
percent on coastal slopes.
24 HR TREND……Up 5 percent.
WIND (20 FT)……..
SLOPES………..Winds east 6 to 8 mph becoming south 6 to 12
mph with gusts to 20 mph in the afternoon.
RIDGETOP………Winds southeast 6 to 13 mph with gusts to 25
mph.
CWR (>0.10 IN)……25 percent.
LAL……………..1…becoming 3 late in the morning.

.TONIGHT…
Sky/weather………Partly cloudy. Slight chance of thunderstorms
in the evening. Slight chance of showers.
Min temperature…..42 to 52 above 6000 feet to 52 to 62 below 6000
feet.
24 HR TREND……Down 4 degrees.
Max humidity……..45 to 55 percent on desert slopes to 70 to 80
percent on coastal slopes.
24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds south 6 to 12 mph with gusts to 20 mph
becoming north 6 to 8 mph after midnight.
RIDGETOP………Winds east 6 to 8 mph.
CWR (>0.10 IN)……13 percent.
LAL……………..3…becoming 1 early in the morning.

.SUNDAY…
Sky/weather………Mostly sunny…becoming partly cloudy. Slight
chance of showers and thunderstorms in the
afternoon.
Max temperature…..65 to 75 above 6000 feet to 71 to 81 below 6000
feet.
24 HR TREND……Down 3 degrees.
Min humidity……..25 to 35 percent on desert slopes to 35 to 45
percent on coastal slopes.
24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds south 6 to 9 mph becoming west 6 to 12
mph with gusts to 20 mph in the afternoon.
RIDGETOP………Winds southeast 6 to 8 mph becoming north 6 to
9 mph in the afternoon.
CWR (>0.10 IN)……10 percent.
LAL……………..1…becoming 3 late in the morning.

SEVERE WEATHER OUTLOOK