739
FXUS66 KSGX 071106
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
406 AM PDT Tue Oct 7 2025

.SYNOPSIS...
There will be weak offshore flow this morning with gusty easterly
winds to 25 mph in the mountains. Moisture from the remnants of
Hurricane Priscilla will spread into the southwest states
on Thursday with chances for showers and thunderstorms for
southwestern California for Thursday into Friday night. This will
be followed be followed by cooling and drying into early next
week with Monday high temperatures 5 to locally 10 degrees below
average for inland areas.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.SHORT TERM (Today through Thursday)...
High pressure to the southeast will bring warming of high
temperatures for today for the coast and valleys of a few to
around 5 degrees. Weak offshore flow will bring easterly winds
with gusts to 25 mph for this morning for the mountains. Not much
change in high temperatures is expected for Wednesday with high
temperatures ranging from around 70 near the coast to the 80s for
the Inland Empire with the lower to mid 90s for the lower deserts.
On Thursday, a low pressure system off the West Coast will begin
to draw moisture from the remnants Of Hurricane Priscilla into the
southwest states. Chances for showers and thunderstorms will
increase for Thursday into Thursday night.

&&

.LONG TERM (Friday through Monday)...
Tropical moisture is expected to peak on Friday with drying for
the weekend. Chances for measurable rainfall are greatest for the
San Diego County mountains at 55 to 65 percent with chances for
one inch or more of rainfall of 10 to 20 percent for the
mountains. There could still be some showers and thunderstorms
near the mountains on Saturday afternoon depending on how quickly
the drying occurs. There will be cooling for the weekend into
early next week with Monday high temperatures for inland areas 5
to locally 10 degrees below average with high temperatures ranging
from around 70 near the coast to the mid 70s to around 80 for the
Inland Empire with the lower to mid 80s for the lower deserts.

&&

.AVIATION...
070930Z....Coasts/Valleys...Low clouds will eventually gather and
cover most coastal and some valleys through 14Z. Bases 1400-1800
feet MSL, tops to 2200 feet, and reduced vis 0-5SM inland valleys
and hills. Clearing inland 15-17Z and near the coast 17-20Z, but
with only partial or intermittent clearing vcnty KSAN and KCRQ. Low
clouds with similar bases/tops/vis to redevelop and gradually spread
inland after 03Z with similar coverage overnight into Wednesday.

Mountains/Deserts...Clear with unrestricted visibility today and
tonight.

&&

.MARINE...
There is a slight chance of thunderstorms Thursday through Friday.
Occasional northwest wind gusts exceeding 20 kts are expected Friday
afternoon and evening around San Clemente Island. Otherwise, no
hazardous marine conditions are expected through Saturday.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE...MM