223
FXUS66 KSGX 161615
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
915 AM 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 few degrees of cooling is
expected for most locations Saturday, with warming conditions
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...

Visible satellite at 9 AM was showing low clouds had moved into
the western valleys overnight. The inversion on the 12Z KNKX
sounding was around 9 degrees and that inversion combined with a
coastal eddy, may result in slower clearing this morning compared
to yesterday morning particularly in San Diego County. 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. PoPs and
thunderstorm chances are expected 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
starting Tuesday and potentially into Thursday. Current trend is
for conditions to dry out Friday into the weekend.

After a brief cool down Saturday, 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 5, 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 more muggy.

&&

.AVIATION...
161500Z...Coast/Valleys...Satellite shows low clouds and fog have
pushed 15 miles inland with CIGs at most coastal sites. VIS at or
below 1SM for higher coastal terrain and valleys area, with
localized VIS reductions below 6SM for other coastal sites. Bases
600-1100ft MSL with tops to 1500ft MSL. Clearing for coastal sites
begins by 17z. Redevelopment of low clouds again tonight, with a
slightly earlier onset of CIGs beginning around 05z. Bases may be
slightly higher with similar tops, and localized VIS reductions to
3SM or less.

Mountains/Deserts...FEW-SCT Cu near the mountains with bases to
12,000ft MSL this afternoon through 02z. Otherwise, unrestricted VIS
and SKC expected through Saturday morning.

&&

.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