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Forecast Discussion for San Diego, CA

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FXUS66 KSGX 181010

Area Forecast Discussion
National Weather Service San Diego CA
310 AM PDT Sun Mar 18 2018

A few lingering showers in San Diego County will end early this
morning. Dry weather with a warming trend will follow into
Tuesday. For late Tuesday through Wednesday, a low pressure system
off the West Coast will bring chances for rain to Orange and
southwestern San Bernardino Counties with lesser chances farther
south. More widespread and potentially heavier precipitation may
spread southward across the area Wednesday night and Thursday with
high snow levels lowering late Thursday and Thursday night, with
showers lingering into Friday morning. Drier with a warming trend
for next weekend.



.SHORT TERM (Today through Tuesday)...
Radar shows scattered mostly light showers continuing in San
Diego County along and west of the mountains...extending
southwestward over the coastal waters of far southern San Diego
County and northern Baja. These will end from the northwest early
this morning.

Dry weather with warming will continue into Monday. Increasing
cloud cover may bring slight cooling for Orange and southwestern
San Bernardino Counties on Tuesday as San Diego County and the
desert portions of Riverside County continue to warm.

A low pressure system off the West Coast with a subtropical
moisture connection is expected to spread rain into central and
portions of southern California on Tuesday. That chance for rain
may extend into portions of Orange and southwestern San Bernardino
Counties for late Tuesday and Tuesday night.


.LONG TERM (Wednesday through Saturday)...
The forecast continues to lean towards the slower ECMWF with the
Canadian model similar if not just slightly slower. This would
keep the plume of subtropical moisture and associated heavy
rainfall directed into central and northwestern portions of
southern California through Wednesday with chances for rain
extending into Orange and southwestern San Bernardino Counties
into Wednesday with lesser chances farther south. The ECMWF would
spread more widespread precipitation southward across the area for
Wednesday night and Thursday with high snow levels...mostly above
8000 feet. Snow levels would lower for late Thursday and Thursday
night with showers continuing into Friday morning.

Weakly cyclonic generally northwest flow would follow into next
weekend with slow warming for Saturday and greater warming for


1800915Z...SHRA will taper off through 12Z. Otherwise SCT-BKN cloud
layers 3000-6000 ft MSL and local mountain obscurations gradually
clearing 15-18Z. Mostly clear with unrestricted vis this afternoon
through Monday morning.


Showers will taper off this morning. No hazardous marine weather is
expected through Tuesday. A storm will bring moderate to heavy rain
Wednesday and Thursday.


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






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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