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

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680
FXUS66 KMTR 302001
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco Bay Area
101 PM PDT SAT JUL 30 2016

.SYNOPSIS...Typical summertime weather conditions will persist
through the weekend with cool temperatures, low clouds and patchy
fog near the coast. Meanwhile, above average temperatures and dry
weather conditions will continue inland. A gradual cooling trend
is forecast for inland areas over the next few days as an upper
level trough develops north of the region. Smokey conditions will
also continue over the Monterey Bay Area northward into the South
Bay as a result of the Soberanes Fire.

&&

.DISCUSSION...as of 1:00 PM PDT Saturday...Temperatures early
this afternoon are running generally a few degrees cooler compared
to 24 hours ago. This is in part to a better defined marine layer
that is between 1000 and 1200 feet in depth as well as weakening
high pressure aloft. Meanwhile, smoke from the Soberanes Fire
continues to be transported northward over the Monterey Bay Region
and up into portions of the South and East Bay as winds off the
surface remain southerly. This will continue to produce areas of
smoke and haze over a good portion of the region through at least
the weekend.

Expecting the marine layer to deepen slightly through the remainder
of the weekend as a long-wave trough pushes inland to our north. As
temperatures aloft cool further, do expect an inland cooling trend
to continue Sunday into Monday. In addition, late night and morning
low clouds will spread a bit further inland through at least Monday.
Also cannot rule out patchy fog each morning with the potential for
some light drizzle/mist.

Dry weather conditions and temperatures near seasonal averages can
then be expected for much of next week as a series of dry mid/upper
level troughs impact the West Coast.

&&

.AVIATION...as of 10:55 AM PDT Saturday... Widespread VFR today
with layers of smoke from the Soberanes fire. Transport winds from
the fire expected to loft most of the smoke towards the NE/ENE
which will impact KSNS most of all but could also bring reduce
visibilities to KMRY and KSJC as well as airports further
upstream. Onshore winds today along the coast. Marine layer
deepens slightly tonight and will push slightly further inland
than this morning.

Vicinity of KSFO...VFR. Breezy onshore winds this afternoon.
Tempo IFR cigs around sunrise Sunday morning.

SFO Bridge Approach...VFR. Breezy onshore winds this afternoon.
Tempo IFR cigs around sunrise Sunday morning.

Monterey Bay Terminals...VFR until about 2Z then LIFR-IFR cigs.
Smoke plume from Soberanes fire shifts towards KSNS with some
impacts at KMRY today (and Sunday). Minor reductions in
visibility due to smoke/haze definitely possible but low
confidence on timing.

&&

.MARINE...as of 08:59 AM PDT Saturday...Generally light winds
today with locally stronger winds through the northern San
Francisco Bay and extreme northern outer waters. A long period
southerly swell as a part of a mixed swell will move through the
waters through the next few days.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...SF Bay until 11 PM

&&

$$

PUBLIC FORECAST: RGass
AVIATION: DRP
MARINE: DRP

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