393
FXUS66 KSGX 132034
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
134 PM PDT Tue Aug 13 2024

.SYNOPSIS...
Fair and seasonal weather will continue through the weekend.
Areas of coastal low clouds will continue nights and mornings,
extending into western valleys. Temperatures will remain around
normal, followed by a warming trend next week.

&&

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

Skies are sunny and bright across the region this afternoon.
Coastal low clouds and fog have fled, but will eventually have
very similar coverage tonight into Wednesday as they did this
morning. But coastal low clouds should not be as prevalent or
uniform for early Thursday. What you see now is what you get:
lots of sunshine. Gusty westerly winds will blow through parts of
the mountains and deserts through tonight. Top gusts in the
windiest places, the usual spots through passes into adjacent
deserts, will exceed 40 mph. A weaker version of these westerly
winds will manifest itself late Wednesday. Temperatures will be
within a few degrees of normal through the rest of the week, with
only minor variations day to day. Very slightly warmer Thursday,
slightly cooler Friday and Saturday. A weak trough of low pressure
over the Pacific Northwest will continue to press against a
stubborn high pressure ridge over Texas for what looks like
forever. This weekend, a trickle of monsoonal moisture begins to
flow into SoCal. For several days, the moisture is insufficient
for thunderstorms through at least the weekend, but eventually
there might be enough moisture and instability for storms in the
mountains and deserts by Tuesday or Wednesday. Early next week,
the ridge imposes itself just a little more to bring a modest
warming trend.

&&

.AVIATION...
132000Z...Coast/Valleys...Mostly clear conditions with VFR expected
throughout the day. Low clouds with bases 700-900 feet MSL with tops
to 1200 feet will develop earlier over KSAN/KCRQ after 03Z and after
07Z around KSNA gradually filling into western valleys overnight.
Clouds scatter out Wednesday morning around 15-16Z.

Mountains/Deserts...Mostly clear with unrestricted VIS through
Wednesday morning. A few Cu based around 12-15kft MSL are possible
over the mountain peaks until 02z this evening.

&&

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

&&

.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...MM
AVIATION/MARINE...Munyan