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000
FXUS66 KSGX 141040
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
340 AM PDT Sun Apr 14 2024

.SYNOPSIS...
A trough of low pressure will bring cool, breezy weather and
scattered showers over Orange, San Bernardino and Riverside Counties
this afternoon and evening, and a chance for showers in San Diego
County. Dry and warmer weather is forecast Tuesday through
Thursday.

&&

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

Showers with the first shortwave and accompanying surface cold front
moved east last night. Rain totals with this system were highest in
Orange County and the south facing slopes of the San Bernardino
Mountains where between 1/4 and 1 inch was reported. Rain totals
were much lighter in the rain shadowed areas of the Inland Empire
where only 0.05"-0.10" was reported at Riverside and Perris. In San
Diego County the rain totals ranged from a few hundredths in the
coastal zones to as much as a 1/2" on the west facing mountain
slopes. A rainfall summary is headlined on our homepage.

There will be a break in the precipitation this morning and even a
little bit of sun before clouds and showers with the second
shortwave advance across Southern California this afternoon and
evening. Similar to the first wave, showers today will be most
widespread in Orange, San Bernardino and Riverside Counties, and
less widespread and lighter in San Diego County. Some areas in the
southern half of the county may not see any rain at all.

Snow levels will be around 5500 feet today with a couple more inches
of accumulation in the San Bernardino Mountains above 7000 feet
where a Winter Weather Advisory is in effect until 8 PM.

Today will be another breezy, cool day with highs from 60-65 in the
coastal and valley zones, from 35-45 in the mountains, in the 50s in
the high deserts, and the mid 70s in the lower deserts. Gusty winds
will continue in the Riverside and San Diego County mountains and
deserts where a Wind Advisory remains in effect until 2 AM Monday.

The trough moves east Monday with weak ridging bringing warmer
weather Tuesday through Thursday.


&&

.AVIATION...
141000Z...Coast/Valleys...BKN/OVC clouds with bases 2500-4000 ft MSL
and tops 6000-10000 ft MSL will prevail through Mon morning. Areas
of -SHRA will occur mainly 20Z today through 04Z Mon, locally
reducing CIGs to 1500-2000 ft MSL and VIS to 3-5 miles.

Mountains/Deserts...Local mountain terrain obscurations will
continue through Sun morning in clouds but then increase again Sun
afternoon/evening as -SHRA/-SHSN move through, with cloud bases
mostly 3000-5000 ft MSL. Surface wind gusts 25-45 kt from the S/W
will continue at times from the mountain crests through the desert
slopes and into the deserts through Mon morning, along with LLWS and
MOD UDDFS.

&&

.MARINE...
Showers will move southeast over the coastal waters Sunday afternoon
through early evening. Winds will strengthen again from the west-
northwest with gusts near 20 kt. Some gusts near 20 kt could occur
again near San Clemente Basin Buoy before weakening by Tuesday.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Winter Weather Advisory until 8 PM PDT this evening for San
     Bernardino County Mountains.

     Wind Advisory until 2 AM PDT Monday for Riverside County
     Mountains-San Diego County Deserts-San Diego County
     Mountains-San Gorgonio Pass Near Banning.

PZ...None.

&&

$$

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