Rancho San Diego, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

212
FXUS66 KSGX 250440
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
940 PM PDT Sun May 24 2026

.SYNOPSIS...
Near average temperatures today with below average temperatures
expected Monday through midweek. Low clouds will spread into the
valleys each night and morning, lingering into the afternoon at
times along the coast. Increased westerly winds expected Tuesday
through potentially Thursday for the mountains and deserts. Patchy
drizzle or light rain possible west of the mountains each night
and morning from Monday night through Thursday morning.

&&

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

...Updated aviation section for 06Z TAF package...

Low clouds in the coastal basin are making their retreat to the
coast with clearing skies behind and to the east of the mountains.
Clearing at the coast will be short lived with the marine layer
expected to move back in later this afternoon and once again
filling into the coastal basin late tonight into the early Monday
morning. High temperatures will be near to just below the seasonal
average as an upper level low moves from just off the coast and
to the east Monday.

As low pressure decreases at the surface through Thursday,
temperatures will continue to cool and the marine layer will deepen.
This will increase chances for patchy drizzle west of the mountains
beginning Monday night through Thursday morning and bring daily
highs 10-15 degrees below average for the Inland Empire, mountain
areas, and deserts by Thursday afternoon.

An upper level trough is expected to slide down the coast Tuesday
through Thursday before moving out to the northeast Friday. This
trough will produce gusty onshore winds in the mountains and
deserts, especially in the desert mountain slopes and passes. The
strongest winds are expected Tuesday and Wednesday in the afternoons
evenings with wind gusts around 35-55 mph in desert areas, with
isolated gusts up to 60 mph through the passes.

Temperatures will begin to increase Friday, reaching near the
seasonal average by the weekend.

&&

.AVIATION...
250000Z...Coast/Valleys...A patch of low clouds 2000-2500 ft MSL
currently in southern SD County will gradually spread
north/northeast overnight, reaching Orange County and the southern
Inland Empire after 07Z and covering the coastal basin by 12Z. The
locations that are most likely to see bases below 2000 ft are near
mountain foothills and far inland valleys (70-80 percent chance of
occurrence). Low clouds expected to clear 18-20Z Mon, but local
areas will see partial and intermittent cloud cover through the day,
especially in south San Diego County. Low clouds with similar to
slightly higher bases will move inland after 00Z Tue, starting in
San Diego County and moving north/northeast again Mon evening.

Mountains/Deserts...Besides FEW-SCT cumulus over the mountain
ridges Mon afternoon, mostly clear with VFR conditions.

&&

.MARINE...
Breezier westerly winds with gusts near 21 kt likely Tuesday and
Wednesday afternoon and evening in the outer coastal waters near San
Clemente Island. Otherwise, no hazardous marine conditions are
expected through Friday.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory from 3 PM Tuesday to 5 AM PDT Thursday for
     Riverside County Mountains-San Diego County Deserts-San
     Diego County Mountains-San Gorgonio Pass near Banning.

     Wind Advisory from 3 PM Tuesday to midnight PDT Tuesday night
     for Apple and Lucerne Valleys.

PZ...None.

&&

$$

PUBLIC...Stewey
AVIATION/MARINE...CSP