175
FXUS66 KSGX 070852
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
152 AM PDT Mon Sep 7 2026

.SYNOPSIS...
Warmer and drier conditions today with any lingering showers
coming to an end early this morning. Warming high and low
temperatures through the middle of next week. Slight chance of
mountain showers and thunderstorms during the afternoon through
Thursday. Gradual cooling will follow with drier conditions going
into the following weekend.

&&

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

Today through tomorrow night...

Latest night fog reveals that there are some areas of low patchy
clouds out over the inner waters of the SOCAL bight, yet the coastal
areas remain clear themselves at this hour, and will likely remain
that way through the morning as there are still a substantial amount
of mid to upper level clouds moving over the region. There are still
a few lingering showers, although the majority of the rain has now
came to an end as the moisture associated with a decaying Hurricane
Marie well to our southwest continues to advect out of the area.
Skies will begin to clear later in the day. The ridge in place will
further build going into the middle of the week. Coincidentally, a
warming trend will also take place, with highs returning to above
average temperatures by tomorrow. For the overnight hours, there
will be a struggling marine layer attempting to form and establish
itself, and there could be areas of patchy fog developing within
some of the higher wind-sheltered valleys, especially where there is
antecedent soil moisture from recent rainfall. Lows will still be
balmy as well, with humidity still being above average. Tomorrow
will bring about further warming and drying.

Wednesday through Sunday...

As the ridge continues to build into the middle of the week,
temperatures will warm back above the seasonal average, with highs
peaking on Wednesday, which will find high temperatures returning
back into the 90s for much of the inland areas, and back over 100
within the IE. The deserts will also see temperatures reaching back
into the 110s. This, in combination with humidity will produce some
high heat indices for the lower elevations of the deserts. There
will still be moisture in place that will move up clockwise around
the high pressure centered over the Four Corners area that will keep
a slight chance of afternoon showers and thunderstorms for the
mountains and adjacent deserts, along with a gradual cooldown
throughout the rest of the work week, especially on Wednesday and
Thursday during the afternoon hours. From there, troughing is
going to help displace mid level moisture further to the east and
suppress the chance of afternoon showers and thunderstorms for
the mountains and deserts. From there, further cooling will occur
going into the following weekend with drier and breezier
conditions. The marine layer will likely also continue to be
displaced and patchy throughout the rest of the work week, and
then should become more prevalent thereafter going into the
weekend as better onshore flow returns. &&

.AVIATION...
070530Z...Mid/high level clouds SCT-OVC AOA 10,000-20,000 feet MSL
will gradually thin tonight and Monday and -SHRA will also gradually
end overnight. VFR conditions to continue through Monday evening.

&&

.MARINE...
No hazardous marine conditions are expected through Thursday.

&&

.BEACHES...
A large south swell from Hurricane Marie is set to peak into
Monday before gradually diminishing Tuesday. This will result in
elevated to high surf and strong rip and longshore currents at the
majority of beaches. Additionally, waves will occasionally run much
farther up the beach than expected, especially during increasing and
high tides.

For south and southwest-facing beaches, expecting high surf 6-10
feet. This includes Orange County and north San Diego County
beaches. For west-facing beaches, expecting elevated surf 4-7 feet.
This includes most of southern San Diego County beaches.

High surf combined with high astronomical tides 6.2 to about 6.8
feet will lead to tidal overflow and coastal flooding through
Tuesday during evening high tides, especially for south and
southwest-facing beaches as well as low-lying areas.

&&

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


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Coastal Flood Advisory until 11 PM PDT Tuesday for Orange County
     Coastal Areas-San Diego County Coastal Areas.

     High Surf Advisory until 11 PM PDT Tuesday for Orange County
     Coastal Areas-San Diego County Coastal Areas.

PZ...None.

&&

$$

PUBLIC...Stewey
AVIATION/MARINE/BEACHES...MM