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702
FXUS66 KSGX 011637
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
935 AM PDT Sat Jun 1 2024

.SYNOPSIS...
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A weak trough over the West Coast this weekend will keep a deep
marine layer in place through Monday with pockets of early morning
drizzle in some areas. Low clouds will retreat back to the coast
each afternoon. High pressure building over the Southwest will bring
warmer days to the valleys, mountains and deserts Wednesday and
Thursday.
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&&

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

The marine layer depth was 3000 feet on this mornings 12Z NKX
sounding, 500 feet deeper than 24 hours ago, deep enough for more
widespread drizzle this morning than yesterday morning. Drizzle was
most widespread in northwestern San Diego County and in southern
Orange County where Camp Pendleton picked up 0.02", and Oceanside,
Carlsbad and Mission Viejo had 0.01". Low clouds will do another
slow burn back to the coast today, clearing from some but not all of
the beaches this afternoon. Skies will be clear over the mountains
and deserts.

Weak troughing over West this weekend and a Catalina Eddy over the
SoCal coastal waters will keep the marine layer deep enough for
areas of drizzle west of the mountains each morning through Monday.
Clouds will clear back to the coast but complete clearing at all of
the beaches in unlikely.

High temperatures today, Sunday and Monday will range from 65-72
near the coast, from 72-82 from in the inland areas, from 70-80 in
the mountains, the low 90s in the high deserts, and from 100-105 in
the low deserts. Gusty westerly winds will impact the mountains and
deserts each afternoon and evening.

From next Tuesday through Friday a 592 dm upper ridge builds over
Nevada, Utah, Arizona and eastern California. This pattern will
bring hotter days to the deserts, and warmer days west of the
mountains. Highs from Wednesday through Friday will range from 105-
112 in the lower deserts, and 100-105 in the high deserts. Mountain
highs will be in the 80s. The eastern Inland Empire will also feel
some of this heat with highs from 90-96 Wednesday and Thursday. The
coastal areas and the western valleys will be not see quite as much
warming as temperatures will be moderated by cool onshore flow and a
marine layer that will shrink but not disappear entirely. Coastal
highs will be near 70, with highs near 80 just a few miles inland.
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&&

.AVIATION...
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011600Z...Coast/Valleys...Low clouds with bases 1500-2100 ft MSL and
tops to 3000 ft MSL will gradually clear the valleys through 19Z and
most coastal areas 18Z-21Z with local BKN clouds within 3 miles of
the beaches continuing through this afternoon. Areas of higher
terrain will be obscured through 19Z, with local VIS 2-4 miles
through 18Z below the clouds in BR. Low clouds will spread over land
again after 23Z, reaching 10-20 miles inland by 04Z Sun and most
valleys by 10Z Sun with bases 1400-1800 ft MSL and tops to 3000 ft
MSL with higher terrain obscured. Clearing will occur 16Z-19Z Sun in
the valleys and 18Z-21Z near the coast.

Mountains/Deserts...Clear skies with unrestricted VIS will continue
through Sun. W wind gusts of 25-35 kt will occur 22z today through
Sun from the mountain crests east through the desert slopes and into
the deserts, including through/near San Gorgonio Pass, along with
MOD UDDFS.
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&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.

&&

$$

PUBLIC...Moede
AVIATION/MARINE...Maxwell