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Area Forecast Discussion (AFD)

Issued by San Diego, CA (SGX)

                            
000
FXUS66 KSGX 170942
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
242 AM PDT Fri May 17 2019

.SYNOPSIS...
Showers will end and winds in the mountains and deserts will
decrease this morning with drier and warmer days through 
Saturday. The next low pressure system will bring cooling, gusty 
winds, and another chance for precipitation for late Saturday 
night into early Monday. Monday through early Tuesday will be 
drier and a little warmer. For late Tuesday through Thursday, a 
persistent trough of low pressure in the vicinity of the southwest
states will maintain cooler than average temperatures with 
occasional chances for precipitation. 

&&

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

.SHORT TERM (Today through Sunday)...
A low pressure system centered over the Great Basin will move
eastward today with weak high pressure moving inland across 
California. A few lingering showers will end early this morning 
with gusty west winds in the mountains and deserts decreasing some
today. High temperatures will be warmer for today and Saturday.

The next Pacific low pressure system will move inland through
California Saturday night and Sunday. This will bring another
round of cooling, stronger and gusty west winds in the mountains
and deserts, with some mostly light precipiation along and west of
the mountains for late Saturday into Sunday night with the cold
front moving across southwestern California during the day on
Sunday.

&&

.LONG TERM (Monday through Thursday)...
Any lingering showers should end from the northwest early Monday
with drying and warming on Monday. The next Pacific low pressure 
system with less certain timing may arrive some time around 
Tuesday bringing more cooling, gusty winds, and another chance for
precipitation. A trough of low pressure will linger in the 
vicinity of the southwest states for the middle part of next week 
maintaining cooler than average temperatures with additional 
chances for precipitation. 

&&

.AVIATION...
170900Z...Coast/Valleys...SCT-BKN clouds with bases 3000-4000 ft 
MSL. Some lower clouds could develop near the coast after 12Z with 
bases 2000-2500 ft MSL. Higher terrain will be obscured in areas of 
low clouds. Scatter out expected after 17Z Friday. Low clouds could 
develop after about 06Z Saturday with bases of 2000-3000 ft MSL, 
but only of moderate confidence and may not be widespread. 

Mountains/Deserts...Winds are expected to increase after 18Z with 
west winds gusts of 20-25 kt expected and MOD UDDFS possible.  

&&

.MARINE... 
A Small Craft Advisory is in effect through 11 PM Friday evening for 
strong westerly winds with gusts 25-30 kts. Brisk winds Saturday 
afternoon will gust over 20 kts. Winds will increase again Sunday 
through Monday with hazardous boating conditions possible.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory until 11 AM PDT this morning for Apple and Lucerne 
     Valleys-Coachella Valley-Riverside County Mountains-San 
     Bernardino County Mountains-San Diego County Deserts-San 
     Diego County Mountains-San Gorgonio Pass Near Banning.

PZ...Small Craft Advisory until 11 PM PDT this evening for Coastal 
     Waters from San Mateo Point to the Mexican Border and out 
     to 30 nm-Waters from San Mateo point to the Mexican Border 
     Extending 30 to 60 nm out including San Clemente Island.

&&

$$

PUBLIC...17
AVIATION/MARINE...Gregoria