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

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FXUS66 KMTR 261559

Area Forecast Discussion
National Weather Service San Francisco Bay Area
859 AM PDT FRI AUG 26 2016

.SYNOPSIS...Very little change is expected to occur through the
weekend and through the middle of next week. Temperatures will be
near or slightly below normal through the period. Areas of night
and morning low clouds will give way to sunny skies by midday for
inland areas. Most coastal areas will continue to see widespread
low cloud cover persist through the daytime hours.


.DISCUSSION...As of 9:00 AM PDT Friday...Widespread clouds this
morning due to a deep marine layer (around 2,800 feet) plus an
onshore flow at the surface. Humidity readings also saw a large
increase for areas in the 2000 to 3000 foot level which should
help with fire fighting efforts. Due to the clouds and deeper
layer, highs will be cooler than normal -- 60s at the coast with
70s and 80s inland.

No major updates planned.

.PREVIOUS DISCUSSION...The marine layer has deepened, and is now
up to around 2200 feet per the Fort Ord profiler. Satellite fog
product imagery shows more low clouds over inland areas than seen
yesterday at this time, but that would make sense given the deeper
marine layer. Temperatures are warmer than 24 hours ago with most
readings in the upper 50s to lower 60s. Highs today are expected
to be cooler than yesterday in most areas with 60s at the coast,
and 70s and 80s inland.

Today is expected to be the coolest day...with slight warming
expected during the weekend as the upper trough over California
is replaced by a weak shortwave ridge. However, weekend
temperatures will remain cooler than average and widespread night
and morning low clouds with little, if any, coastal clearing
during the afternoon hours.

Medium range models bring a longwave trough along the West Coast
next week, deepening it during the week. This will maintain cool
temperatures through the period, but also may deepen enough to mix
out the coastal marine layer resulting in a little warmer weather
along the coast, a preview for fall.


.AVIATION...As of 4:56 AM PDT Friday...Widespread stratus
prevails across the forecast area under a 2400 ft marine layer.
IFR/MVFR cigs will scatter out between 17z-21z today with Monterey
area terminals possibly seeing only temporary clearing or no
clearing at all. Light and variable winds expected through the
morning hour then increasing to 15 kt this afternoon and evening.

Vicinity of KSFO...MVFR cigs anticipated to scatter out around
17z-18z this morning. Light winds expected to prevail through
the morning then increasing in the afternoon with the onset of the
seabreeze to around 15 kt.

SFO Bridge Approach...Similar to KSFO. Approach will scatter out
around 17z. Light winds.

Monterey Bay Terminals...IFR cigs anticipated to scatter out
around 19z this afternoon over KSNS with KMRY possibly seeing no
clearing or only temporary clearing. Light winds

&& of 3:00 AM PDT Friday...A weak pressure gradient
across the coastal waters will maintain light winds and seas
through the weekend. Locally stronger and gusty winds anticipated
north of the bay bridge in the afternoon hours. A mixed short
period northwest swell and a long period southerly swell will
continue to impacts the coastal waters.


     .Tday...SCA...SF Bay from 1 PM




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