High Surf in California, March 13, 2019

Area Forecast Discussion
National Weather Service San Francisco Bay Area
843 PM PDT Wed Mar 13 2019

.SYNOPSIS...High pressure will persist over the West Coast
through the weekend resulting in dry weather conditions and a
gradual warming trend. The ridge will weaken early next week with
the potential for rain showers to return to the region late
Tuesday or Wednesday.

&&

.DISCUSSION...as of 8:43 PM PDT Wednesday...Clear skies prevail
this evening as high pressure builds in over the region.
Temperatures finished off the day an average 3 to 5 degrees warmer
than yesterday. Highs topped out in the mid 50s to mid 60s across
the district this afternoon nearing seasonal norms for this time
of year. As the week progresses temperatures are forecast to warm
a few degrees each day gradually rising above seasonal averages by
the end of the week and into the weekend. Clear skies will
maintain cool overnight lows with upper 30s to lower 40s expected
once again tonight. Lows will gradually climb into the 40s late in
the week and into the weekend with lower 50s anticipated by early
next week.

High pressure off the California coast will ridge across the
Pacific Northwest tonight into Thursday and build in over the
Great Basin Thursday and Friday. This will bring mainly light
north to northeasterly winds to the region. A couple of weak
shortwaves will pass to the north of the region late Thursday
into Friday and again on Saturday slightly flattening the ridge
with each pass. Nonetheless an abundance of sunshine and slight
offshore flow will allow temperatures to warm up into the upper
60s to low 70s at the coast to widespread low to mid 70s over the
interior through the weekend.

From previous discussion...The ridge is then forecast to break
down by Monday with a return of onshore flow. This will bring
temperatures down back to near seasonal averages as well. An
unsettled pattern then appears likely to develop by the middle of
the week as a weak mid/upper level system approaches the coast.
Ensembles indicate precipitation will return as early as Tuesday
with subsequent systems producing additional rainfall through the
latter half of next week. With this said, none of these systems
appear to be strong at this time and likely only produce light to
moderate amounts of rainfall.

&&

.AVIATION...As of 4:52 PM PDT Wednesday...VFR, dry weather conditions
with surface high pressure building over the Great Basin.

Vicinity of KSFO...VFR. West wind generally under 20 knots through
early evening. Wind becoming light NE late tonight into Thursday
morning then onshore again in the afternoon.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...VFR, W-NW winds diminishing to light winds
and becoming E-SE by late evening to midnight. Onshore winds return
Thursday afternoon.

&&

.MARINE...as of 8:16 PM PDT Wednesday...Breezy to gusty winds
gradually decreasing over the coastal waters later tonight as high
pressure builds into the Great Basin. Winds will decrease further
through late week and the weekend.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...SCA...Mry Bay until 9 PM
             SCA...Pt Arena to Pt Reyes 0-10 nm until 9 PM
             SCA...Pt Reyes to Pigeon Pt 0-10 nm until 9 PM
             SCA...Pigeon Pt to Pt Pinos 0-10 nm until 9 PM
             SCA...Pt Arena to Pigeon Pt 10-60 nm until 9 PM
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm until 9 PM
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM

&&

PUBLIC FORECAST: CW
AVIATION/MARINE: Canepa

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