Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 191549
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
849 AM PDT Sat Aug 19 2017

.SYNOPSIS...
Fair and mild weather will continue this coming week, but with a
warming trend next weekend. Coastal clouds will continue nights
and mornings. Monsoon moisture will bring a small chance of
showers to the mountains and high desert Monday.

&&

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

Coastal clouds made it into the corners of the Inland Empire this
morning and the cloud deck itself is thicker. That will mean a
slower clear out this morning than we`ve had lately. A weak low
pressure trough off the coast will sit and spin for a few days. On
Sunday and Monday the southeast flow in front of the trough will
draw monsoon moisture out of Sonora and Arizona into southeast
California, specifically nosing into San Bernardino County. The
moisture and instability are sufficient on Monday to forecast a
slight chance of showers and thunderstorms in the mountains and
deserts, mainly north of San Diego County. This guidance is backed
off from what I saw yesterday. The low pressure trough will also
deepen the marine layer and extend coastal clouds a little farther
inland Sunday and Monday mornings. Most of the coastal basin will
get filled. Temperatures will be mild for mid-August through most
of next week. The low pressure trough weakens Tuesday and
Wednesday before lifting out Thursday and Friday. The resulting
higher pressure aloft will bring a warming trend Friday and
Saturday along with a shallower marine layer.

&&

.AVIATION...
191530Z...Coast/Valleys...Stratus with bases 1200-1600 ft MSL and
tops near 3000 ft MSL continue up to 25 to 30 miles inland through
late this morning. 2-4 SM VIS in BR expected where low clouds
intersect higher terrain. Low clouds clearing to the coast 17-19Z.
Stratus redeveloping along the coast after 20/00Z with bases near
1200-1800 ft MSL and spreading into the valleys overnight.

Mountains/Deserts...Mostly Clear skies and unrestricted visibility
through Sunday.

&&

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

&&

.BEACHES...
A 2-3 ft/14-15 sec period swell from 200 degrees will continue
through the weekend, producing surf of 4 to 5 ft north of Carlsbad.
Strong rip currents will accompany the surf. High tides each evening
will peak around 6.5-6.8 feet, possibly leading to minor tidal
overflow. A Beach Hazards Statement remains in effect through Sunday
evening.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement from 5 PM PDT this afternoon through
     Sunday evening for Orange County Coastal Areas-San Diego
     County Coastal Areas.

PZ...NONE.

&&

$$

PUBLIC...MM
AVIATION/MARINE/BEACHES...Brotherton



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