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000
FXUS66 KSGX 052210
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
210 PM PST Thu Dec 5 2019

.SYNOPSIS...
Dry and a little warmer weather continues through Friday as a weak
ridge drifts east across the State. For the upcoming weekend, a
moist flow off the Pacific will bring more clouds, slight cooling,
and a chance for some occasional light rain. A large west swell may
bring high surf to our beaches this weekend. For early next week, a
stronger ridge aloft will bring fair and warmer weather.

&&

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

Some patchy high clouds were drifting over SoCal this afternoon with
a solid temp recovery in many areas. Some patchy cumulus clouds were
near the mountains. Some patchy marine clouds could develop
overnight, along with some patchy radiation fog, otherwise it should
remain fair tonight. Surface pressure gradients were weak and winds
light.

A weak ridge over CA today will drift slowly east on Friday as a low
pressure center wraps up 500-600 miles off of Cape Mendocino. The
low will weaken and drift east into NoCal this weekend as a weak
moist stream with embedded disturbances approaches and moves east
over SoCal. With little lift and instability, this event may be
largely orographic due to moderate upslope flow on the coastal
slopes. The weakened system from the north sweeps through on Monday,
gradually clearing out the moisture. Some upslope spots on the San
Bernardino Mts could see an inch or more total through the weekend,
but most areas look to be well below one inch. Lower elevations are
currently projected at mostly one-quarter inch or less total this
weekend so only minor runoff expected.

Fair with a warming trend beginning on Tuesday, with high pressure
aloft in control through the week. The following weekend could be
quite warm with daytime temperatures well above average.


&&

.AVIATION...
052000Z...Coasts/Valleys/...SCT-BKN low clouds with bases around
3000 ft MSL this afternoon. Otherwise, SCT 3000-5000 feet MSL with
unrestricted vis through tonight.

Mountains...Coastal slopes obscured above 3000 feet MSL in some
areas with fog reducing vis to 1-3 miles at times. Otherwise, SCT
25000 feet MSL with unrestricted vis through tonight.

&&

.MARINE...
Isolated to scattered showers Saturday and Sunday. Combined seas may
rise to around 9 feet Saturday evening into Sunday morning.
Otherwise, no hazardous marine weather is forecast through Monday.

&&

.BEACHES...
A new swell from the WNW will arrive and build on Saturday. Surf up
to 8 feet will be possible. The swell and surf will peak late
Saturday and early Sunday before subsiding Sunday night. Stay tuned
to the Surf Zone Forecast along with any hazard statements that may
be issued.

&&

.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...10
AVIATION/MARINE/BEACHES...PG