157
FXUS66 KSGX 162040
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
140 PM PDT Fri Aug 16 2024

.SYNOPSIS...
Dry and seasonal conditions expected for the weekend. The weather
pattern will begin to support an influx of monsoonal moisture by
early next week, with the best chance of thunderstorms Wednesday
and lesser chances Tuesday and Thursday. A warming trend is
expected Sunday through Tuesday. Night and morning low clouds and
fog are expected to continue to reach into portions of the western
valleys through early next week.

&&

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

Low clouds have mostly cleared from the coast at 1 PM this
afternoon, with areas of high clouds moving south to north across
the area. Temperatures at 1 PM today, were running a few degrees
cooler than 1 PM yesterday for the coast and valleys; up to 5
degrees warmer for the mountains and High Desert; and a few degrees
cooler to the same in the low deserts. Temperatures are expected to
cool a few additional degrees into Saturday for most locations.
Night and morning low clouds and fog are expected to continue each
day through early next week. An influx of monsoonal moisture mid-
week may hinder low cloud development.

Dry conditions are expected to continue through Monday. Shower and
thunderstorm chances are will to begin to increase on Tuesday.
The best chance of showers and thunderstorms next week continues
to look like Wednesday, but chances of thunderstorms are elevated
Tuesday and Thursday. Thunderstorms are expected to remain
confined to the mountains Tuesday and Thursday, with the potential
for showers or thunderstorms to move into portions of the deserts
Wednesday afternoon. Current trend is for dry conditions to
return Friday into the weekend.

Temperatures will begin to warm again starting Sunday. Temperatures
will peak on Tuesday, with moderate to areas of major heat risk in
the Inland Empire. Overall, temperatures will be 3 to 7, locally up
to 10 degrees above normal for Tuesday. The increase in moisture for
Wednesday and potentially Thursday will help decrease high
temperatures but conditions will feel muggy.

&&

.AVIATION...
162000Z...Coast/Valleys...Redevelopment of patchy low clouds occurs
slightly earlier tonight, with CIGs at coastal sites as early as 04-
06z. Bases similar to this morning, around 600-1100ft MSL, with tops
to 1300-1500ft MSL. Similar VIS reductions as well, with valleys and
higher coastal terrain as low as 1-3SM, briefly less than 1SM
possible, and other coastal sites as low as 4-6SM. Clearing should
occur by 17z on Saturday.

Mountains/Deserts...FEW-SCT Cu near the mountains with bases to
12,000ft MSL through 01z. A few high clouds with bases 25,000ft MSL
through the evening as well. Unrestricted VIS expected through
Saturday afternoon.

&&

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

&&

.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...CO
AVIATION/MARINE...Zuber