049
FXUS66 KSGX 241040
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
340 AM PDT Tue Sep 24 2024

.SYNOPSIS...
Continued dry with high temperatures for today for inland areas
around 5 to 10 degrees above average. There will be a few degrees
of cooling for Wednesday and Thursday followed by slight warming
on Friday. A little cooler for the weekend, then a little warmer
for early next week. Night and morning coastal low clouds will
continue to spread into portions of the western valleys late each
night.

&&

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

.SHORT TERM (Today through Thursday)...
Early this morning, a weak low pressure system is off the
California coast with high pressure over the Great Basin. The
marine layer is slightly deeper with coastal low clouds extending
inland into portions of the western valleys. Not much change in
high temperatures is expected for today with high temperatures for
coastal areas near average to around 5 to 10 degrees above average
for the mountains, deserts, and inland valleys.

High temperatures for the coast and valleys may be a few degrees
cooler for Wednesday and Thursday with slight deepening of the
marine layer with night and morning coastal low clouds extending
a little farther inland into the western valleys. Not much change
in high temperatures is expected for the mountains and deserts.

&&

.LONG TERM (Friday through Monday)...
Upper level low pressure will remain off the coast with high
pressure to the east bringing slight warming for Friday. Then a
little cooler for Saturday and Sunday as that weak low pressure
system moves to near the California coast. High temperatures a few
degrees cooler will spread inland on Saturday and Sunday with
Sunday high temperatures a few to around 5 degrees below average
for the coast and valleys and around 4 to 8 degrees above average
for the deserts with high temperatures for the lower deserts of
100 to 105. Then a little warmer for the coast and valleys on
Monday as low pressure along the coast weakens.

&&

.AVIATION...
240930Z...Coasts/Valleys...Low clouds, based around 600-900 feet MSL
with tops near 1600 feet, will continue to push into western valleys
through 14Z. Vis reduced 0-5SM on higher coastal terrain and
valleys. Scatter out should be 17-19Z, but with only partial or
intermittent clearing at the immediate coast. Low clouds will push
ashore after 23-03Z and gradually spread inland overnight into
Wednesday, with similar bases/tops/vis and a little greater coverage
inland.

Mountains/Deserts...Mostly clear today and tonight.

&&

.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