National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FXUS66 KSGX 150402
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
902 PM PDT Sun Apr 14 2024

.SYNOPSIS...
Scattered showers will taper off from north to south tonight. Dry
and much warmer weather is forecast Monday through Thursday under
an upper level ridge of high pressure. The warmest day is
expected on Wednesday before a weak weather system arrives for
late week.

&&

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

Evening Update...
Water vapor satellite imagery shows the main trough axis passing
through Orange County and into San Bernardino County. Isolated to
scattered showers continue to move west to east across So Cal but
will be decreasing in coverage over the next couple hours before
finally coming to an end overnight. Rainfall totals so far today
have ranged from a couple hundredths of an inch (if any) in San
Diego County to over one-half inch or more in the Inland Empire
near the foothills of the San Bernardino Mountains. Any additional
accumulation this evening will be less than one-tenth inch.
Elsewhere, breezy west winds will slowly weaken overnight. Warmer
weather with less cloud cover on Monday as the trough departs,
though highs remain around 5 to 10 degrees below normal.

Previous Discussion...
Rapid warming of the air mass for Tuesday and Wednesday, reaching
14-17C at 850 mb by Tuesday afternoon and northerly flow due to a
weak short wave sliding through. Inland temperatures will soar
into the 90s for deserts with 18-20C at 850 mb level and hold
into next weekend. The far inland valleys will also warm rapidly
with 80s for Tuesday and Wednesday and very mild in surrounding
mountains.

NWP has a weak Pacific upper trough arriving late Thursday which
brings increasing southwest wind flow and cooler temperatures for
the coast and inland valleys and mountains, not much change for
lower deserts.

&&

.AVIATION...
140315Z...Coast/Valleys...SCT-BKN cloud layers with bases 1500-3000
FT MSL and BKN-OVC 4000-6000 FT. SCT -SHRA across Orange, San
Bernardino, Riverside and San Diego Counties will continue until
about 10Z. Reduced cigs of 1000-2000 FT MSL and vis of 2-4 SM in -
SHRA at times. Widespread VFR conditions after 17Z.

Mountains/Deserts...Local mountain terrain obscurations will
continue through Monday morning. -SHRA/-SHSN with bases 3000-5000 FT
MSL through 15Z. Gusty W-SW winds over/east of mtns, with winds of
20-30 kt gusting 40-50 kt will weaken later tonight. Areas of
up/downdrafts and LLWS over/east of mtns.

&&

.MARINE...
Scattered showers will continue for a few more hours this evening
with west to northwest winds continue to gust near 20 kts. WInds
will weaken further overnight. No hazardous marine conditions are
expected for Monday through Friday.

&&

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


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...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...SS/AOT
AVIATION/MARINE...PG