770
FXUS66 KSGX 031002
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
302 AM PDT Fri May 3 2024

.SYNOPSIS...
Not much change from Thursday for today. A low pressure system
moving inland through California for the weekend will bring
cooling on Saturday and much greater inland cooling on Sunday.
There will be periods of strong and gusty southwest to west winds
for the mountains and deserts for Saturday afternoon through
Sunday evening with the stronger gusts to 55 to 65 mph. There is
also a chance for light showers for late Saturday night into
Sunday morning from the coast to mountains. Then warmer and dry
for Monday through Thursday, but with high temperatures still a
few degrees below average on Thursday.

&&

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

.SHORT TERM (Today through Sunday)...
There is once again a well-defined eddy over the coastal waters
with widespread low clouds over the southern California bight
extending inland across all of the valleys. High temperatures
today will be slightly cooler for the coast and valleys and a few
degrees warmer for the deserts.

A low pressure system will move inland through California on
Saturday night with stronger onshore flow for the weekend. There
will areas of stronger and gusty southwest to west winds for the
mountains and deserts for Saturday afternoon into Sunday evening
with the stronger winds along the desert slopes of the mountains
late Saturday night and across the deserts on Sunday afternoon.
Gusts to 55 to 65 mph are expected in the windier locations with
isolated gusts to around 75 mph.

High temperatures will be a few to around 5 degrees cooler than
today on Saturday with Sunday much cooler inland with the
mountains and deserts another 12 to 18 degrees cooler.

There is a chance for light showers for late Saturday night into
Sunday morning with amounts ranging from a few hundredths of an
inch or less near the coast to one-quarter to locally one-half
inch on the coastal slopes of the mountains with the greater
amounts most likely on the coastal slopes of the San Bernardino
County mountains.

&&

.LONG TERM (Monday through Thursday)...
Dry with high temperatures on Monday several degrees warmer than
Sunday, as much as 10 to 15 degrees warmer for the mountains and
high desert. Much slower warming for Tuesday through Thursday with
Thursday high temperatures still a few degrees below average.

&&

.AVIATION...
030930Z...Coasts/Valleys...BKN-OVC low clouds cover most areas west
of the mtns, with bases around 1500 ft MSL and tops to 2500 ft.
Higher terrain will be obscured at times. Most VIS below the clouds
will be unrestricted, except local VIS 3-5 miles with fog in the
valleys through 18Z. Clearing will be 16Z-19Z in the valleys and 18Z-
21Z near the coast, with areas of BKN clouds continuing at the
beaches Fri afternoon. Low clouds will spread inland again Fri
evening with slightly higher bases.

Mountains/Deserts...Clear skies with unrestricted VIS will continue
through Fri evening.

&&

.MARINE...
No hazardous marine conditions are expected through Saturday
morning. Gusty west to northwest winds late Saturday through Sunday
evening are likely to generate hazardous boating conditions,
especially in the outer waters (30-60 NM from the coast). Current
projections for strongest winds are on Sunday when gusts could be 25-
30 knots near San Clemente Island with a few gusts 20-25 knots near
the coast.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory from noon Saturday to 8 PM PDT Sunday for Apple
     and Lucerne Valleys-San Bernardino County Mountains-San
     Gorgonio Pass Near Banning.

     Wind Advisory from 3 PM Saturday to 8 PM PDT Sunday for
     Coachella Valley-Riverside County Mountains-San Diego
     County Deserts-San Diego County Mountains.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE...PG