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

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS66 KMTR 251123

Area Forecast Discussion
National Weather Service San Francisco Bay Area
423 AM PDT THU AUG 25 2016

.SYNOPSIS...Very little change is forecast to occur through the
weekend and into next week. Temperatures will be near or slightly
below normal, with the coolest day expected to be Friday. Areas of
night and morning low clouds will give way to sunny skies by
midday for inland areas.


.DISCUSSION...As of 2:58 AM PDT Thursday...The marine layer
hasn`t changed much over the past 24 hours and still hovers at
around 1600 feet deep, per the Fort Ord profiler. Satellite shows
a similar pattern compared to yesterday at this time with coastal
low clouds filling most inland valleys. Currently temperatures are
running a few degrees cooler than 24 hours ago, with readings
mainly in the 50s.

High pressure aloft over the Eastern Pacific will weaken as an
upper trough edges southwestward from the Northern Rockies. As a
result, today will be warm like yesterday, but slightly cooler
temperatures are expected beginning on Friday. Also on Friday and
Saturday, low-level winds are forecast to switch from the south,
and this will bring smoke from the wildfires in Monterey County
northward which will result in deteriorating air quality as far
north as Santa Clara County perhaps even through the weekend. Winds
are expected to return to a northwesterly direction early next
week as an upper level trough approaches California, which will
reverse this trend and bring improving conditions to the Bay Area.
A long-wave upper level trough is then forecast to remain along
the West Coast through the remainder of next week keeping slightly
cooler conditions in place.


.AVIATION...As of 04:20 AM PDT Thursday...very little change from
previous forecast. Marine layer moved inland overnight bringing
MVFR/IFR/LIFR cigs to all terminals. Cigs will linger 17-18Z then
VFR this afternoon. Cigs return again tonight.

Vicinity of KSFO...MVFR/IFR cigs through 17-18z. VFR this

Moderate confidence.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...LIFR through 17-18z Thursday. VFR this
afternoon. Cigs returne early tonight.

&& of 2:18 AM PDT Thursday...Relatively quiet weather
will continue over the coastal waters with light winds and calm
seas. Locally stronger and gusty winds north of the Bay Bridge
each afternoon and evening through at least late week. A mixed
swell will continue as a long period southerly swell impacts the
coastal waters.


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




Visit us at

Follow us on Facebook and twitter at: is the U.S. government's official web portal to all federal, state and local government web resources and services.