FXUS66 KMTR 251152
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
352 AM PST Sun Jan 25 2026
...New AVIATION...
.KEY MESSAGES...
Updated at 252 AM PST Sun Jan 25 2026
- Offshore winds weaken today; light winds then prevail into mid-week
- Slight chance of rain showers late Tuesday/Wednesday AM along
coastal ranges and the North Bay. Amounts generally less than
0.1"
- Slight chance of light rain next weekend in the North Bay with
amounts expected to be less than 0.1"
&&
.SHORT TERM...
Issued at 252 AM PST Sun Jan 25 2026
(Today and tonight)
Tule fog in the vicinity of the East Bay and southern Napa County is
struggling to advance farther west where dewpoint depressions in
lower lying areas remain around 5-10 degrees as of 3AM PST. High
clouds have begun making their way inland on the subsident side of
the amplified ridge axis just offshore and will continuing
drifting over our area throughout the day. Although the synoptic
ridging pattern across the west will persist into the beginning of
the upcoming work week, we'll see a series of shortwave troughs
interrupt the ridging at our latitude with little impact on our
ambient weather conditions today and tonight. High temperatures
today will be cooler than Saturday for the North Bay, Bay Area and
East Bay with increasing mid/high level cloud cover and the weak
offshore flow getting neutralized. Overnight lows into early
Monday morning will also tick a few degrees warmer for most of
our interior locations.
&&
.LONG TERM...
Issued at 252 AM PST Sun Jan 25 2026
(Monday through Saturday)
Modest increases in mid level heights and thickness will increase
temperatures on Monday into the low to mid 60s for most of our area
as the upper level ridging is reinvigorated through Tuesday.
However, the reincarnated ridging on Tuesday is progressive. A
deepening trough over the eastern Pacific in the wake of the ridging
appears to lift north as it approaches the coast, with a trend
toward less rainfall for our area Wednesday from the previous update
Saturday afternoon. The longwave synoptic pattern remains active
through the remainder of the extended forecast, especially for
eastern CONUS, but the net result for the Bay Area and Central Coast
is relatively quiet weather. There's a slight chance for some light
amounts of beneficial rain next weekend.
&&
.AVIATION...
(12Z TAFS)
Issued at 352 AM PST Sun Jan 25 2026
VFR through the TAF period for all sites but APC which will see
spotty fog into the mid morning. High clouds continue to build into
the region through much of the the day, but thin into Monday
morning. Winds will mostly say light through the TAF period with
wind directions being determined by mostly localized effects.
Vicinity of SFO...VFR through the TAF period. Expect mostly light
and variable winds through the late morning before turning northeast
for the afternoon and the evening. Winds become light and variable
again into Sunday night and northeast again late Monday morning.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR through the TAF period. Light and
affect MRY through the forecast. Winds stay east to southeast
through the morning and into the mid afternoon, with more moderate
winds possible at SNS. Lighter west to northwest winds build in from
the bay in the mid afternoon, but winds look to turn easterly in the
early night. East-southeast winds build in the late night at SNS,
becoming more moderate.
&&
.MARINE...
(Today through Friday)
Issued at 252 AM PST Sun Jan 25 2026
Light winds turn southerly in the mid afternoon increase to
become more moderate for Monday and Tuesday. Winds diminish and
become northerly on Wednesday. Moderate seas will prevail through
Tuesday. Conditions deteriorate Wednesday as seas build to become
rough to very rough.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.
&&
$$
SHORT TERM...JM
LONG TERM....JM
AVIATION...Murdock
MARINE...Murdock
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Prepared by Boulder-Creek.com Weather at: Sun Jan 25 10:30:03 PST 2026
From the National Weather Service
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