Area Forecast Discussion
Issued by NWS San Diego, CA

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FXUS66 KSGX 071055
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
255 AM PST Wed Dec 7 2016

.SYNOPSIS...
Areas of gusty westerly winds in the mountains and deserts will
diminish this morning as areas of northeast winds develop through
and below mountain passes and foothills. Fair and seasonal weather
is expected this coming week, but with more clouds again Saturday
and Sunday mornings. Less cloudiness and slightly warmer weather
next week.

&&

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

Low clouds fill the coastal basin up the coastal slopes to about
5000 feet this morning. At the same time variable high clouds
continue to drift higher overhead. The strong westerly onshore
winds in parts of the mountains and deserts will diminish this
morning. Offshore flow will develop today, but will not amount to
much. Some gusts below Cajon Pass are forecast to 30 mph or less
heading into eastern Orange County. Even weaker winds below other
mountain passes and foothills. The breath of offshore flow will
help the low clouds clear across the region, but won`t be a big
flush of dry air like recent offshore episodes have been. Fair
weather with variable high clouds will continue, with little if
any low clouds Thursday and Friday. Our weather pattern for the
coming week doesn`t change much. A strong zonal (east-west
oriented) jet stream will continue across Northern California
with no waves or any buckling of the jet to produce any kind of
organized storm system. The jet stream will continue to act as a
conveyor belt for variable high clouds for a while. There is a
moisture plume pointed at Northern California that will sag
southward over the weekend into Central California. This will
bring precipitation to the northern two thirds of the state, but
Southern California will most likely get nothing or next to
nothing. Onshore flow will return with some breezy conditions in
the mountains and deserts. In addition, the marine layer will
redevelop and bring low clouds nights and mornings in the coastal
basin. On Monday and Tuesday there is subtle rise in heights aloft
that will bring slightly warmer weather and less cloudiness.

&&

.AVIATION...
070945Z...Coast/Valleys...Variable clouds this morning, with bkn-ovc
cigs mostly between 2500-3500 ft MSL. Gradual clearing this morning
between about 12Z and 17Z. Expect earlier clearing vcnty KONT, KSBD
and KSNA and later clearing vcnty KSAN and KCRQ. Occasional gusty
northeast winds 15-20 knots with gusts to 30 knots will occur in the
northern Island Empire, including VCNTY KONT, KRAL, KCNO, KSBD and
inland Orange County near the Santa Ana Mountains 15Z-21Z Wed.

Mountains/deserts...Areas of strong west winds 20-30 knots with
occasional gusts to 50 knots will continue this evening, causing
moderate to strong up/down drafts and local LLWS over and east of
the mtns. Areas of terrain above 3500 ft MSL on the coastal slopes
will be obscured in clouds and fog through 12Z Wed. Otherwise,
variable clouds at/above 15000 ft MSL will continue through
Wednesday with unrestricted vis above the terrain obscurations.

&&

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

&&

.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...MM
AVIATION/MARINE...Brotherton



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