762 
FXUS66 KSGX 161019
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
319 AM PDT Thu Apr 16 2020

.SYNOPSIS...
The return of onshore flow will spread cooling inland today along 
with a return of coastal low clouds and fog. A compact low 
pressure system on Friday followed by a weak low pressure system 
on Saturday will bring cooling, gusty west winds in the mountains 
and deserts, and a chance of showers. Sunday will be dry and a 
little warmer. Another pair of low pressure systems for Monday and
Tuesday will bring cooling, gusty winds in the mountains and 
deserts, and a chance of showers. Then dry and warmer for the 
middle of next week.

&&

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

.SHORT TERM (Today through Saturday)...
Early this morning, satellite imagery shows patchy low clouds and
fog over northern Orange County, near Point Loma, and along
portions of the northern Baja coast. The low clouds and fog may
fill in some near the coast into this morning, but not extend
inland much past the mesas in San Diego County. The fog could be
locally dense near higher coastal terrain inland to the mesas. The
return of onshore flow today will spread cooling inland into the 
coast and valleys.

A compact low pressure system will move inland through southern
California on Friday followed by a weaker low pressure system from
the northwest on Saturday. This will bring cooling for Friday and
Saturday with periods of gusty west winds in the mountains and 
deserts. There will be an initial chance for showers on Friday 
with continuing chances for showers into Saturday. Rainfall will 
generally be less than one-quarter inch. The snow level will be 
mostly between 6500 and 7000 feet. 

&&

.LONG TERM (Sunday through Wednesday)...
Sunday will be dry and a little warmer under weak high pressure.
A pair of low pressure systems will move inland through southern
California on Monday and Tuesday with some model timing and
intensity differences. In general, they are expected to bring 
cooling, periods of gusty west winds in the mountains and deserts,
and chances for showers for Monday into Tuesday. It will then be 
warmer and dry for the middle of next week with high temperatures 
warming to around average.

&&

.AVIATION...
160900Z...Patchy low clouds along the coast through 16Z. Cigs would 
be 500-800 feet MSL and vis possibly as low as 1-3SM. Any impacts at 
coastal airports would be brief. More low clouds will develop and 
spread farther inland this evening after 03Z. Bases more like 1000-
1500 feet MSL, with local vis reductions of 3-5SM on higher coastal 
terrain. Otherwise, mostly clear skies today and tonight.

&&

.MARINE...
No hazardous marine weather is expected through Monday. 

&&

.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...17
AVIATION/MARINE...MM