Small Craft Advisory 59, NWS San Francisco Bay Area, CA

Area Forecast Discussion
National Weather Service San Francisco Bay Area
445 PM PDT Tue Apr 9 2019

.SYNOPSIS...Blustery conditions this afternoon with strong
northwesterly winds. Seasonably cool and breezy conditions will
persist through midweek with the potential for isolated showers
returning Thursday night into Friday. Mainly dry weather is
forecast for the upcoming weekend.

&&

.DISCUSSION...as of 01:44 PM PDT Tuesday...Skies have cleared and
shower activity has ended from N to S across the Bay Area this
afternoon. There are a few afternoon cu building up around the
region, but KMUX radar imagery indicates showers mainly confined
to the Sierra. Despite the afternoon sunshine temperatures are
actually cooler than 24 hours ago. The cool down is thanks in part
to a passing cold front followed by cold air advection. Many sites
around the region are running 3 to 8 degrees colder. The cold air
advection also ushered in much strong winds. One word to describe
the rest of the afternoon will be Blustery. Gusty northerly winds
will persist through this evening before diminishing ever so
slightly overnight. Winds will still remain breezy on the higher
peaks well into Wednesday.

Weak ridging will develop over the region on Wednesday with a
slight upward trend in temperatures. The slight warm up will be
short lived as another weak system approaches from the north late
on Thursday. However, dry conditions will persist through
Thursday. A weak disturbance passing through the Sierra (semi
inside slider) will increase clouds across the region Thursday
into Friday. Previous model runs suggested a better chance for
some showers with this system, but today's model suite has really
backed off. Official forecast will reflect this trend and keep
some isolated showers confined to the higher peaks early Friday.
Regardless of the drier forecast the slider will give a another
shot of breezy conditions. 500mb heights and 850mb temperatures
warm late Friday into Saturday. The building ridge will lead to
warmer weather to kick off the weekend.

Medium range models still show the tail end of another passing
system bringing clouds and an isolated shower to the region early
next week.

&&

.AVIATION...As of 4:40 PM PDT Tuesday...Skies are clear except
for a few cumulus clouds over the higher terrain. Gusty northerly
winds will slowly decrease tonight. VFR conditions expected
through Wednesday but will have to watch MRY as clouds from the
coastal hills could briefly sneak over the airport tonight.

Vicinity of KSFO...VFR. Northwest winds gusting to 35 kt
decreasing to 28-30 kt after 05Z and 20-22 kt after 11Z.
An Airport Weather Warning has been issued for KSFO through 05Z
for gusty winds.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...VFR expected but will have to watch for
clouds south of MRY possibly sneaking over the airport.

&&

.MARINE...as of 04:33 PM PDT Tuesday...Strong high pressure will
maintain strong and gusty northerly gale force winds across the
coastal waters. These winds will generate  steep fresh swell
creating hazardous seas conditions over the  waters, especially
for smaller vessels. Expect winds to remain  elevated through much
of the week. Light to moderate northwest  swell will continue
through the week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...Wind Advisory...Entire coast
             SCA...Pt Arena to Pt Reyes 0-10 nm until 2 PM
             SCA...Pt Reyes to Pigeon Pt 0-10 nm until 2 PM
             SCA...Pigeon Pt to Pt Pinos 0-10 nm until 2 PM
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm until 2 PM
             SCA...Pt Arena to Pigeon Pt 10-60 nm until 2 PM
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm until 2 PM
             GLW...Pigeon Pt to Pt Pinos 0-10 nm until 9 PM
             GLW...Pt Arena to Pt Reyes 0-10 nm
             GLW...Pt Reyes to Pigeon Pt 0-10 nm
             GLW...Pt Pinos to Pt Piedras Blancas 0-10 nm
             GLW...Pt Arena to Pigeon Pt 10-60 nm
             GLW...Pigeon Pt to Pt Piedras Blancas 10-60 nm
             SCA...Rough Bar Advisory for SF Bar until 2 PM
             SCA...Mry Bay until 3 AM
             SCA...SF Bay until 3 AM

&&

PUBLIC FORECAST: MM
AVIATION: W Pi
MARINE: AS/CW

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