386
FXUS66 KSGX 082028
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
128 PM PDT Sat Jun 8 2024

.SYNOPSIS...
Slight cooling is expected this weekend before slow warming
develops on Monday. Extensive night and morning low clouds will
cover the coast and valleys each day, with low clouds persisting
at the coast into the afternoons. Gusty onshore winds will occur
this afternoon and Sunday afternoon over the mountains and
deserts.

&&

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

At 1 PM, skies have cleared over the Inland Empire and San Diego
County Valleys, but remain at the coast and over inland Orange
County. Some sunshine may be able to peek through the clouds this
afternoon, but full clearing is not expected at the coast.
Temperatures are running 2-5 degrees lower than Friday afternoon
across inland areas and are a degree or two above at the coast.
Highs will remain slightly above normal along the desert slopes
into the deserts, but will run 2-8 degrees below normal across
the coast and valleys.

A 588 DM low is weakening over the Gulf of California today and a
shortwave is approaching Southern California from the west. The
shortwave will enhance onshore flow today and tomorrow, with the
strongest winds of 35-55 mph along the desert slopes in the
afternoons. Temperatures will fall a few degrees for tomorrow,
with highs reaching the upper-60s to low-70s across the coast and
western valleys, the upper-70s to low-80s in the Inland Empire,
the 70s in the mountains, near 90 in the High Desert and the
low-100s in the lower deserts.

The shortwave strengthens and detaches from the mean flow early
next week and parks off the coast of northern Baja California for
the following several days. The most noticeable impacts from the
low will be the increasing high clouds across the region, and
will also help maintain extensive night and morning low clouds
across the coast and valleys. Small changes in the depth of the
marine layer will occur each day, impacting how far inland the
clouds will progress and the amount of time it will take to clear
each day. Ridging to the north will support slow warming on Monday
and Tuesday, with little day-to-day changes in the temperature
for Wednesday through Friday.

&&

.AVIATION...
081930Z...Coast/Valleys...Low clouds with bases 1200-2000 ft MSL and
tops to 2500 ft MSL linger along and near the coast this afternoon,
with most locations within 5 miles of the coast expected to remain
BKN/OVC through this afternoon. Low clouds will spread back through
most coastal areas by 05Z Sun and most valleys by 10Z Sun with
similar or slightly higher bases and similar clearing times Sun
morning. Areas of terrain will be obscured at times.

Mountains/Deserts...FEW-SCT250 and unrestricted VIS will continue
through Sun morning. W-NW winds will increase this afternoon,
peaking late afternoon/early evening with peak wind gusts around 25-
30kts at times.

&&

.MARINE...
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...EA
AVIATION/MARINE...Adams