687
FXUS66 KSGX 031200
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
500 AM PDT Thu Sep 3 2026

.SYNOPSIS...
It will remain cooler and drier for inland areas through Friday, with
patchy night and morning coastal low clouds spreading into portions
of the western valleys at times. The center of Hurricane Marie
will remain well to the south of the area. But a large increase in
surf is expected for for Saturday into Sunday, then slowly
subsiding for Labor Day into early next week. Mid and high level
moisture from Marie will bring more clouds with increasing chances
for showers for Saturday night into Sunday along with a slight
chance of thunderstorms for the mountains, deserts, and inland
valleys for Sunday afternoon.

&&

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

.SHORT TERM (Today through Saturday)...
Cooler and drier conditions will continue for inland areas through
Friday with high temperatures as much as 5 to 10 degrees below
average for the mountains and inland valleys. High temperatures
through Friday will range from the mid 70s near the coast to the
mid 80s to lower 90s for the Inland Empire with the lower deserts
around 100.

While the center of Hurricane Marie is expected to remain well to
the southwest of the area, mid and high level moisture and clouds
is expected to spread into the area for Saturday through Sunday,
then decrease for late Sunday night through Labor Day.

High temperatures will warm on Saturday with warmer nights for
Friday night through Sunday night. High temperatures on Saturday
will range from the mid 70s to lower 80s near the coast to the
upper 80s to mid 90s for the Inland Empire with the lower deserts
around 100.

&&

.LONG TERM (Sunday through Wednesday)...
The track of the center of Hurricane Marie is expected to be
toward the west northwest through Saturday. For Saturday evening,
that would place it well to the south of Point Conception and
well to the west and a little to the south of the southern tip of
Baja.

Chances for showers will increase on Sunday along with a slight
chance of thunderstorms on Sunday afternoon for the mountains,
deserts, and inland valleys. Chance for showers will then decrease
for Sunday night and Labor Day. There is greater spread in the
high temperature guidance on Sunday due to differences in the
amount of moisture influx and clouds.

There is a 40 to 50 percent chance of one-tenth inch or more of
rainfall for lower elevations with chances for one inch or more
of rainfall in the mountains of 10 to 20 percent.

Surf from Hurricane Marie is expected to increase on Saturday and
Saturday night, peak on Sunday and Sunday night, then begin to
slowly diminish on Labor Day.


&&

.AVIATION...
031130Z...Coast/Valleys...Patchy low clouds based 1500-2000 feet MSL
will continue this morning, with random and intermittent cigs
through 16Z. A very similar patchy low cloud situation will develop
tonight after 08Z into Friday.

Mountains/Deserts...Mostly clear skies today and tonight. Breezy
westerly winds mainly through mountain passes and along desert
slopes 20-07Z. Gusts 25-35 kts with pockets of moderate
up/downdrafts over and in lee of ridges.

&&

.MARINE...
No hazardous marine conditions are expected through Monday. However,
wind gusts around 20 knots are expected this afternoon and evening
around San Clemente Island.

&&

.BEACHES...
A large south swell from Hurricane Marie will move into the region
Friday night and Saturday, likely peaking Sunday-Monday, before
diminishing Tuesday. This will likely result in elevated to high
surf and strong rip and longshore currents. Maximum surf of 6-10
feet is forecast for south/southwest-facing beaches. This will
combine with high astronomical tides to increase the potential for
tidal overflow and coastal flooding Saturday through Tuesday. Stay
tuned as details become clearer in coming days.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

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

&&

$$

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

NWS San Diego (SGX) Office