111
FXUS66 KSGX 261051
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
351 AM PDT Tue Aug 26 2025

.SYNOPSIS...
There will be another round of afternoon and early evening
thunderstorms today, mainly for the mountains and deserts with
strong gusty winds and locally heavy rainfall. There will be
decreasing moisture and thunderstorms chances for Wednesday. Mid
and high level moisture from the remnants of Tropical Storm
Juliette could bring some scattered showers and isolated
thunderstorms on Thursday. Then gradual warming and drying for
Friday through the weekend with a slight chance of showers and
thunderstorms for the San Bernardino Mountains each afternoon.

&&

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

.SHORT TERM (Today through Thursday)...
There will be decreasing monsoonal moisture into Wednesday. There will
be another round of afternoon and early evening thunderstorms
today, mainly for the mountains and deserts, with strong gusty
winds and locally heavy rainfall. There will be decreasing
thunderstorms coverage on Wednesday afternoon with the drying.

For Thursday, mid and high level moisture from the remnants of
Tropical Storm Juliette could bring some scattered showers and
isolated thunderstorms, mainly across about the southeastern half
of southern California.

&&

.LONG TERM (Friday through Monday)...
There will be gradual warming and drying for Friday through Sunday
with a slight chance of afternoon showers and thunderstorms for
the San Bernardino Mountains.

With the warming, high temperatures on Sunday will mostly be
within a few degrees of average. High temperatures on Sunday will
range from the mid 70s to lower 80s near the coast to the 90s to
around 100 for the Inland Empire with 106 to 110 for the lower
deserts.

The marine layer will be near 1200 to 1500 feet deep with night
and morning low clouds over the coastal waters spreading into
coastal areas each night.

&&

.AVIATION...
261000Z...Coast/Western Valleys...Low clouds and fog will
gradually cover through 13Z. Bases will be around 1100 feet MSL
with tops to 1300 feet. Vis reduced to 3-5SM along inland edge of
cloud. Scatter out 16-17Z. Low clouds to tentatively return late
tonight into Wednesday 06-10Z, with bases/vis a little lower and
coverage more confined to the coast.

Mountains/Deserts...Isolated +SHRA/TSRA 18-01Z with CB bases around
10 kft. Gusty and erratic winds of 35 kts or greater, 1-3 SM vis in
+RA, small hail, and lightning are possible. 40-50% chance of TSRA
VCNTY KPSP and KTRM until 01z Wednesday.

&&

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

&&

.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...MM

NWS Tucson (SGX) Office