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Forecast Discussion for San Diego, CA

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000
FXUS66 KSGX 311643
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
943 AM PDT Tue Mar 31 2020

.SYNOPSIS...
A weak low pressure system well off the northern Baja coast will
spread high clouds across southern California today with warm
weather for the region. For Wednesday and Thursday, onshore flow
will strengthen and spread cooling and cloud cover along the
coast and further into the valleys each night. Friday will be a
little warmer, then a weak low pressure system moving inland
across California on Saturday will generate cooling inland for
the weekend. Another stronger storm system from the northwest
will bring chances for precipitation by early next week.

&&

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

.SHORT TERM...(Today through Thursday)...
A large area of high pressure in the eastern Pacific will provide
another dry day today. Southwesterly flow aloft on the
southeastern edge of this system will continue to stream in a
thick band of high clouds across the region today. Though these
clouds will persist, your Tuesday will be the warmest day of the
week with temperatures a touch above normal. A weak coastal eddy
will form this evening, which may bring some brief low clouds and
fog to the coast later at night.

As a storm system enters the Pacific Northwest today, this will
lead to a troughing pattern over the West and bring us more cooler
and windier weather for the middle of the week. An increase in
onshore flow can be expected as surface gradients tighten. This
will bring some gusty winds to the mountains and deserts Wednesday
afternoon into early Thursday morning. The coastal eddy will
strengthen as well, leading to a deeper marine layer. This will
bring low clouds to the coast and further into the inland valleys,
where patchy drizzle cannot be ruled out.

&&

.LONG TERM...(Friday through Monday)...
As we get into the weekend, the weather pattern will slowly
become more unsettled. The upper atmosphere will begin to
stabilizeon Friday, bringing slightly warmer temperatures and
dry weather. Ensembles are in rather good agreement on the timing
of the first initial and smaller storm system to slide into
Northern California late Friday night into Saturday. But that`s
only round one of the "one two punch" as a storm system is
expected to gain strength as it pushes south from the Gulf of
Alaska. This system will usher in some colder air and chances for
precipitation as we head into Sunday evening and potentially
lasting through much of Monday as well.

&&

.AVIATION...
311535Z...BKN-OVC200 today and tonight. 09Z-12Z Wednesday...SCT010
near the coast becoming BKN-OVC015 at the coastal airports.

&&

.MARINE...
No hazardous marine weather today. A Catalina Eddy spins up tonight
and generates south winds from 10-15 kt over the Inner Waters
Wednesday.

&&

.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...APR
AVIATION/MARINE...Moede

Previous Forecast Discussions may be found at
NWS San Diego, CA (SGX) Office Forecast Discussions.
(Click 'Previous Version' there to view past versions successively.
Some may differ only in time posted.)

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