Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA
FXUS66 KMTR 262055
Area Forecast Discussion
National Weather Service San Francisco Bay Area
155 PM 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 2:00 PM PDT Friday...Cooler than normal
weather continued across our region today thanks to a deep marine
layer (around 2,800 feet) plus an onshore flow and a poorly
defined longwave trough near our region. Current readings are
generally in the 60s at the coast with 70s to lower 80s inland
with sunshine at almost all non-coastal spots. Tonight is expected
to be a near repeat of last night with clouds and patchy fog
retuning to almost all spots under the 2,000 foot elevation mark.
Synoptically a ridge of high pressure will build back toward our
region this weekend into the first part of next week which will
lead to a gradual warming trend along with a more compressed
marine layer. Although all areas should see some warming, the
biggest increases will be well inland where temperatures will move
back closer to normal. For those looking for hot weather, portions
of San Benito and Monterey counties will return to the upper 90s
to lower 100s.
Longer range guidance swings back to cooler than normal starting
on Tuesday as a deeper longwave trough moves to the west coast
with additional energy slated for next Friday and possibly the
following week. Inland highs will drop back into the 70s to lower
80s with coastal towns mostly in the 60s.
No rain is forecast in our CWA over the next 10 days, however rain
may fall over Northern California as energy comes in from the
.AVIATION...as of 10:48 AM PDT Friday...Low clouds quickly
dissipating over inland areas around the San Francisco Bay with
generally weak southerly winds. Cloud cover slower to burn-off
over the North Bay however. Meanwhile, low clouds persist over
much of the Monterey Bay Region as the marine layer remains around
2800 feet in depth. Thus, this area may remain under low clouds
through much of the day, potentially breaking out for a few hours
this afternoon. Onshore flow will increase slightly though
the afternoon and early evening with low clouds likely to spread
back inland late this evening and persist into Saturday morning.
Vicinity of KSFO...Low ceilings have scattered out over the
region this morning with variable to light southerly winds. Wind
speeds will then increase this afternoon out of the west/southwest
with the onset of the sea breeze. Low clouds likely to return
around 04Z this evening and will persist into Saturday morning.
SFO Bridge Approach...Similar to KSFO.
Monterey Bay Terminals...MVFR ceilings persist over the region
this morning and will likely remain in place through much of the
day. However, inland areas such as KSNS may scatter out briefly
this afternoon before low clouds spread back inland this evening.
Onshore winds will increase slightly through the afternoon as the
sea breeze develops.
.MARINE...as of 10:48 AM PDT Friday...A weak surface pressure
gradient across the coastal waters will maintain generally 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 impact the coastal waters.
.Tngt...SCA...SF Bay until 11 PM
PUBLIC FORECAST: Bell
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