716
FXUS66 KSGX 162035
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
135 PM PDT Thu May 16 2024

.SYNOPSIS...
A persistent marine layer will continue into next week with night
and morning low clouds expected each day, and limited clearing at
the coast. Steady high temperatures are expected through the
weekend, with cooling for early next week. Slight warming next
Tuesday and Wednesday will be followed by further cooling late
next week.

&&

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

At 1 PM, low clouds have cleared from southern San Diego County
and southern portions of the Inland Empire, but are holding steady
across north county and Orange County. Further clearing is
expected across inland areas over the next several hours, but
clouds are expected to redevelop in areas that clear by this
evening.

Southern California will remain in a fairly stagnant pattern over
the next several days as an upper-level low sits to our west and
multiple lows move through the Pacific Northwest. Persistent "May
Gray" will continue across the coast and valleys each night and
morning with limited clearing expected at the beaches. Patchy
drizzle will be possible at times west of the mountains in the
early morning hours. Minimal changes in high temperatures are
expected through Sunday; highs will top out 2-5 degrees below
normal across the coast, valleys and mountains, and up to 5
degrees above average in the deserts.

The low to our southwest will become an open wave and absorb into
the mean flow, likely passing over the region Monday. This will
lead to an uptick in gusty winds over the mountains and deserts,
and lead to slight cooling-region wide. Monday will likely be the
coolest day of the week, with highs topping out 3-7 degrees below
normal at the coast and in the deserts, and 5-10 degrees below
normal in the valleys and mountains. Slight warming is expected
for Tuesday and Wednesday. Another deep trough moves down the West
Coast by the middle of next week, continuing onshore flow and a
deep marine layer over Southern California.

&&

.AVIATION...
161950Z...Coast/Valleys...BKN-OVC020-030 tops 4000 feet through 23Z
except SKC-SCT030 in the some of the valleys and in southern San
Diego County including KSAN. Low clouds spreading back inland 00-04Z
tonight and filling the coastal basin through Friday morning with
bases 1500-3000 feet and tops to 4000 ft. Patchy drizzle 10-16Z
Friday.

Mountains/Deserts...Mostly clear today and tonight. West winds
gusting 30-40 kt through mountain passes into adjacent deserts
after 23Z.

&&

.MARINE...
No hazardous marine conditions through Monday.

&&

.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...Moede