Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA
FXUS66 KMTR 292135
Area Forecast Discussion
National Weather Service San Francisco Bay Area
235 PM PDT FRI JUL 29 2016
.SYNOPSIS...Typical summertime conditions will continue over the
next several days with clouds and cooler temperatures near the
coast with warmer weather inland. A cooling trend is slated to
begin during the weekend as an upper level trough approaches the
west coast. Smokey conditions will continue over portions of
Monterey Bay to the South Bay.
.DISCUSSION...as of 2:30 PM PDT Friday...Very similar conditions
to yesterday with around a 2 MB onshore flow combined with a 1000
foot marine layer lead to a wide range in temperature. Coastal
locations at this hour are in the upper 50s to lower 70s with
inland spots generally in the 80s and 90s. 24 hour change product
shows most locations are within 2 degrees of yesterday. Main item
of note remains the Soberanes fire with its very visible presence
on satellite. Smoke can be seen extending to the north and
northeast into a large portion of the Monterey Bay Region.
Forecast wise, minor cooling can be expected over the next several
days as a longwave trof approaches the west coast. This will help
to increase the onshore flow and bring higher humidity values to
our region. The biggest impact will be for inland spots that have
been the hottest. Temperatures there will see a 5 to 10 degree
drop by Sunday and Monday compared to today.
Longer range forecast indicates little change through the
remainder of next week and possibly longer with a weak zonal flow
in place aloft and a continual onshore flow at the surface.
Temperatures should average near normal for the period.
.AVIATION...as of 11:10 AM PDT Friday... Marine layer has
retreated offshore with VFR conditions reported across the area.
A wind shift over the Soberanes Fire will bring more smoke
northeastward today and especially into this weekend which could
once again bring a 3000-10000 foot layer of smoke to most TAF
sites. Main impacts expected at KSNS and potentially KMRY due to
projected trajectory of the smoke and proximity to the fire.
Marine layer expected to gradually deepen and push further inland
through the weekend.
Vicinity of KSFO...VFR. Breezy onshore winds this afternoon.
SFO Bridge Approach...Same as terminal.
Monterey Bay Terminals...Smoke from the Soberanes Fire will
continue to linger aloft over the Monterey Bay area today with
transport winds blowing from the south. VLIFR-LIFR cigs/visbys
posbl after 02Z as marine layer pushes inland and combines with
smoke condensation nuclei.
.MARINE...as of 07:59 AM PDT Friday...High pressure over the
eastern pacific coupled with a thermal trough along the coast will
maintain light to moderate northwesterly winds across the coastal
waters. strongest winds will remain over the northern outer waters
and north of the bay bridge. a mixed swell will continue across
the coastal waters.
.Tngt...SCA...SF Bay until 11 PM
PUBLIC FORECAST: Bell
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