Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA

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FXUS66 KMTR 210527
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco Bay Area
1027 PM PDT Fri Apr 20 2018

.SYNOPSIS...A warming trend and dry weather are forecast through
the upcoming weekend. A weak low pressure system may impact the
region with increased clouds and showers late next week.

&&

.DISCUSSION...as of 9:00 PM PDT Friday...An upper level ridge
moving over the area brought 5 to 10 degrees of warming over
yesterday. The exception was along the coast south where onshore
flow and patchy low clouds kept temperatures cooler.

Surface high over the eastern Pacific will build into the Pacific
Northwest coast tonight and Saturday bringing a dry light
northerly flow over the area. This will result in a few degrees
of warming in all areas Saturday. High temperatures will
generally be in the mid 60s to low 70s coast and upper 70s to
upper 80s inland.

The ridge will weaken as an upper level trough passes to the
north of the district. This will put a halt to the warming into
early next week.

Medium range models show a cutoff low forming off the California
coast the middle of next week bringing cooler weather and possibly
a few showers.

&&

.AVIATION...As of 10:27 PM PDT Friday...VFR, with mainly clear skies,
will prevail through the overnight with exception of MVFR/IFR along
the immediate coastline.

Vicinity of KSFO...VFR. Winds are forecast to diminish after sunset.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...Low clouds developing again tonight, but
confidence low regarding timing and coverage. Light onshore winds
overnight.

&&

.MARINE...as of 10:23 PM PDT Friday...Gusty northwest winds will
prevail through the weekend over the coastal waters as high pressure
remains over the eastern Pacific. Steep wind waves and fresh swell
will result in hazardous seas likely through the weekend and into
early next week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...SCA...Pt Reyes to Pigeon Pt 0-10 nm
             SCA...Pigeon Pt to Pt Pinos 0-10 nm
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
             SCA...Pt Arena to Pt Reyes 0-10 nm
             SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm

&&

$$

PUBLIC FORECAST: W Pi
AVIATION: Canepa
MARINE: BAM

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