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Area forecast discussion 
National Weather Service San Diego California
925 am PST Sat Dec 27 2014

Synopsis...
near the coast...near normal conditions are expected for the next
several days as high pressure surface and aloft dominates the local
weather. Chilly weather will continue inland areas through the rest
of the weekend with frost in some wind-sheltered locations again for
tonight. Otherwise...clear skies. Increasing clouds beginning late
Sunday afternoon into Monday will result in warmer nights in the
valleys early in the week as a storm system approaches. Around
Tuesday...the storm will bring rain...wind...and snow to the region.
This storm will drop down from the Gulf of Alaska...and will be a
cold storm ... snow levels possibly down around 2000 feet at
times around the middle of the week.The storm should move out late
Thursday...but temperatures will continue below seasonal normals.

&&

Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
counties...

Short term...
strong...cold high pressure will continue to bring gusty winds
through midday in the wind prone areas below canyons and passes...
mainly inland areas. The winds should die down this afternoon. The
dry airmass brought frosty conditions this morning...and should
again bring frosty conditions to some areas tonight into Sunday.

Sunday afternoon and evening should be a transition period between
the dry offshore flow conditions and the moist...onshore flow
conditions. Rapid development of a moist boundary layer can be
expected Sunday night into Monday with the low clouds returning. The
local WRF is hinting at a significant marine push of low clouds
early evening on Monday. BUFKIT has the marine layer deepening up to
over 3000 feet deep by sunrise on Monday.

&&

Long term...
the real action returns to the area beginning on Tuesday. A low
moving from the Gulf of Alaska into Canada...then almost straight
south will be bringing some cold weather to the region...with also
precipitation. The GFS ensemble places the low over the southern
sierras by late Wednesday evening with a good tap into the eastern
Pacific. This event looks to be a rather convective one...so
precipitation amounts will be very tricky to predict. It looks like
the storm could linger into Thursday morning...then begin to push
east...leaving some gusty north to northeast winds in its wake.
Continued cool conditions can be expected Friday.

&&

Aviation...
271600z...clear skies and unrestricted visible through 18z sun.

Through 272000z this morning...areas of NE winds 10-20 kts with
higher gusts along the Orange County coastal foothills...mainly
below canyons and passes with associated uddfs and low level wind shear. Some gusty
winds are also coming through the passes and gaps in the San
Bernardo mountains. These winds will subside during the day.

&&

Marine...
800 am...areas of NE winds 10 to 15 knots with higher gusts will
diminishing into the afternoon. The strongest northeast winds will
be north of Oceanside and westward to San Clemente Island. A Small Craft
Advisory has expired...but some localized gusty winds are possible
into early afternoon.

&&

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

&&

Sgx watches/warnings/advisories...
California...Wind Advisory until noon PST today for the Orange County
coastal areas...San Bernardino County mountains...San
Bernardino and Riverside County valleys-the inland
Empire...Santa Ana Mountains and foothills.

Frost advisory from midnight tonight to 8 am PST Sunday for the
San Diego County deserts.

Frost advisory from midnight tonight to 8 am PST Sunday for the
Coachella Valley.

Wind Advisory until noon PST today for the San Diego County
mountains...San Diego County valleys.

Pz...none.

&&

$$

Public...small
aviation/marine...Pierce

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