DesertWeather.com

516
FXUS66 KSGX 150550
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
1050 PM PDT Fri Aug 14 2026

.SYNOPSIS...
Subtle monsoonal moisture will provide a slight chance of showers
across the mountains and adjacent deserts this afternoon and
Saturday afternoon. A trough offshore will keep temperatures
slightly below average through the weekend. A ridge of high pressure
will expand by next week, leading to a warmer and drier weather
trend across Southern California.

&&

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

...UPDATED AVIATION DISCUSSION...

The marine layer deepened much more this morning with the passing of
high clouds pushing to the east. Clouds will continue to erode
near the coast, though there may be only intermittent clearing at
the beaches into the afternoon, especially in San Diego County. A
trough offshore will keep temperatures below normal again today
into the weekend. Highs will remain in the 80s and 90s for most
valley, foothill, and high desert locations during this time
period. High pressure to the east and the trough to the west will
help funnel in some monsoonal moisture through the weekend as
well, making it feel more on the humid side. Lack of instability
and drier southwest flow aloft remains the biggest proponent of
any widespread storm activity, so rain chances remain small across
the mountains and adjacent deserts. Moisture decreases slightly
by Saturday, moreso into Sunday. If any rain falls over the next
couple of days, it will be light and localized.

High pressure begins to expand by next week. By Monday,
temperatures will warm to near seasonal averages. The high
expands a bit further into the middle of next week, where
temperatures will peak around 5 degrees above average. This trend
will also lead to drier and lower humidity across the board. The
marine layer is expected to remain in a healthy and shallower
state next week as well, covering coastal areas and far western
valleys with clouds and patchy fog each night and morning.

&&

.AVIATION...
150530Z....Coast/Valleys...Low clouds have moved into Orange County
and areas of coastal San Diego, stretching into the valleys. Cloud
bases are around 1,500-2,500ft MSL and will continue to move inland
and spread into the Inland Empire after 08Z. Vis restrictions 3-5SM
will be possible in areas where clouds intersect terrain. Low clouds
will begin to clear the IE and SD valleys 15-16Z and inland OC 16-
17Z. There is a 30-50% chance of patchy low clouds sticking to
coastal SD through the TAF period.

Mountains/Deserts...VFR conditions prevail through the TAF period.
SCT-BKN clouds AOA 10,000ft MSL expected to form after 18Z with a
slight chance (10-20%) for TSRA over the Riverside County mountains
and in the high deserts.

&&

.MARINE...
Brief gusty northwest winds 20-23 knots near San Clemente Island
expected Sunday and Monday afternoon. Otherwise, no hazardous
marine conditions are expected through Wednesday.

&&

.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...APR
AVIATION/MARINE...Villafane