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000
FXUS66 KSGX 270434 CCA
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
930 PM PDT Fri Apr 26 2024

.SYNOPSIS...
Showers will gradually taper off by a little after midnight, with
decreasing winds overnight. Fair weather will return Saturday with
higher pressure aloft. The marine layer will continue to bring at
least some low clouds near the coast each night and morning, with
mostly seasonal temperatures next week.

&&

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

Update...

So far no thunderstorms have formed, but some showers were
occurring, especially in the foothills on the north and east sides
of the Inland Empire. Only local rainfall over 1/10" has occurred
late this afternoon and this evening. The trough axis will move
through in the next few hours, with precipitation ending after the
passage of the axis a little after midnight. Otherwise, mostly
clouds skies will continue through early Saturday, with HRRR/HREF
showing good clearing over the region during the day Saturday and
low clouds being rather patchy Saturday night near the coast.
Regarding the winds, the high-res models/LAMP/NBM MOS suggest a
gradual decrease in the winds overnight, allowing for an 11 PM
expiration of the wind advisory, though some breezy conditions will
continue in some mountain/desert areas Saturday afternoon/evening
with a few gusts over 40 MPH. Fair warmer weather will prevail early
next week.

Previous discussion...

The murky cloudiness and drizzle from this morning has lifted and
busted up somewhat this afternoon, especially at the coast.
Strong westerly winds continue in the lee slopes of mountains into
the deserts with isolated gusts over 60 mph around San Gorgonio
Pass. A vigorous shortwave of low pressure will shoot through
interior SoCal this evening. This will continue to force strong
winds in the mountains and deserts, but also boost coastal winds
this afternoon. Isolated to scattered light showers will continue,
mainly in foothills today. As the wave axis moves through this
afternoon and evening, it will bring colder air aloft,
destabilizing the atmosphere especially in the interior. That`s
why there`s a small chance of thunderstorms over the higher
mountains in SBD and RIV Counties and adjacent valleys late this
afternoon and evening. San Diego County valleys will get an
enhanced chance of showers during this time. Showers and winds
decrease overnight and all that`s left by sunrise Saturday will be
the clouds from mountains westward. Clearing out Saturday should
get an early start in Orange County before the rest of the area
clears out by late morning, although some cumulus clouds will form
over the mountains. Weak high pressure aloft will bring fair and
warmer weather next week. High temperatures all week will be near
normal at the coast and slightly above normal inland. A coastal
eddy and a persistent marine layer will contribute coastal clouds
during the nights and mornings. While uncertainty continues in the
upper air pattern next week, the range of outcomes is rather
small. A weak ridge pattern will prevail. For now it looks like
fair and truly spring-like weather, with seasonal temperatures
and low clouds near the coast during nights and mornings.

&&

.AVIATION...
270455Z...Coast/Valleys/Mountains...BKN020-040 tops 6500 feet with
ISO -SHRA through 15Z Saturday. Mountains obscd in clouds and fog at
times. Gradual clearing 15Z through 19Z Saturday.

Deserts...Mostly clear with gusty northwest winds 20-40 kt
decreasing overnight. Gusty desert winds of 20-30 kts returning
Saturday afternoon.

&&

.MARINE...
A Small Craft Advisory is in effect through 7 AM Saturday for strong
northwest winds of 20-30 kt and a short-period wind swell of 6
seconds that will produce hazardous boating conditions, especially
beyond 15 nautical miles from shore.

Winds and seas subside Saturday. Lighter winds and seas are forecast
Sunday through Wednesday.

&&

.BEACHES...
Elevated surf from a short-period wind swell on exposed west-facing
beaches. Surf and swell will gradually subside tonight into Saturday.

&&

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Saturday morning for Orange
     County Coastal Areas-San Diego County Coastal Areas.

     Wind Advisory until 11 PM PDT this evening for Apple and Lucerne
     Valleys-Coachella Valley-Riverside County Mountains-San
     Bernardino County Mountains-San Diego County Deserts-San
     Diego County Mountains-San Gorgonio Pass Near Banning.

PZ...Small Craft Advisory until 7 AM PDT Saturday for Coastal Waters
     from San Mateo Point to the Mexican Border and out to 30 nm.

     Small Craft Advisory until 11 AM PDT Saturday for Waters from
     San Mateo Point to the Mexican Border Extending 30 to 60 nm
     out including San Clemente Island.

&&

$$

PUBLIC...Maxwell (Update)/MM (Previous Discussion)
AVIATION/MARINE/BEACHES...Moede