National Weather Service Forecast Discussion

Dicussion provided by the National Weather Service Forecast Office located in San Diego, California

986
FXUS66 KSGX 230927
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
227 AM PDT Thu Mar 23 2017

.SYNOPSIS...
Isolated showers will linger mainly in foothills and mountains
through sunrise. Otherwise, gradually clearing weather is
expected today with areas of gusty winds in the mountains and
deserts. Fair weather will continue through Friday. A weak trough
of low pressure could bring a few showers Saturday. Another
trough on Monday will bring some strong winds in the mountains
and deserts, and could bring a few showers. Temperatures will
average a little below normal through early next week.

&&

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

Isolated showers continue early this morning, but mainly in
foothills and mountains. These will continue to decrease and
probably end by sunrise. Winds in the mountains and deserts this
morning will continue to gust over 30 or even 40 mph in the usual
top spots, but will decrease during the day. Skies will gradually
clear from northwest to southeast today and, despite the
sunshine, it will be a cool day. Brief high pressure allows for a
fair and warmer day Friday. Some semblance of a marine layer could
produce a few clouds in the coastal basin tonight into Friday. A
new trough of low pressure barges in Friday night and quickly zips
through California on Saturday. Not a lot of moisture or energy,
but just enough to justify a chance of showers. Sunday appears
fair and dry, but cool. The next trough of low pressure on Monday
is very similar to Saturday`s. The chance of showers is quite
small, but this system could bring stronger winds to mountains and
deserts. Tuesday and Wednesday look fair under fleeting high
pressure aloft. Another big trough appears Thursday or Friday. We
seem to be in a progressive pattern that keeps sending deep
troughs of low pressure through the Southwest, with Southern
California on their periphery. That will keep our weather on the
cool side. If these troughs take a more direct path into our
region it could mean showers and/or winds.

&&

.AVIATION...
230900Z...isolated showers will gradually taper off through 15Z. SCT-
BKN cloud layers 2500-6000 ft MSL along/west of the mountains this
morning. Higher terrain remaining partially obscured in
clouds/fog/precip. After 15Z, FEW-SCT clouds above 3000 ft MSL and
unrestricted vis.

Through 15Z...west winds 20-30 kt with gusts 35-45 kt along the
ridges and desert slopes with mod-stg up/downdrafts and LLWS over
and east of the mountains. Winds gradually weakening during the day
Thursday.

&&

.MARINE...
West-northwest winds 20-25 kt with local gusts to 30 kt over the
outer coastal waters and combined seas near 10 ft will create
hazardous boating conditions. A Small Craft Advisory remains effect
for the coastal waters through this afternoon. Winds and seas will
diminish by Thursday evening.

&&

.BEACHES...
Elevated surf will hit the beaches as a west northwest swell
increases across the local waters today. A Beach Hazards Statement
was issued for surf of 5 to 7 FT. The surf will gradually lower this
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 through this afternoon for Orange County
     Coastal Areas-San Diego County Coastal Areas.

PZ...Small Craft Advisory until 5 PM PDT this afternoon 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...MM
AVIATION/MARINE/BEACHES...Gregoria

NWS SGX Office Area Forecast Discussion