FXUS66 KMTR 261732
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
932 AM PST Mon Jan 26 2026
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 325 AM PST Mon Jan 26 2026
- Weak offshore winds continue through the middle of the week
- Slight chance of rain Tuesday evening into Wednesday morning.
Amounts generally less than 0.1" and focused in the North Bay.
- Slight chance for rain next weekend continues trending drier
&&
.SHORT TERM...
Issued at 325 AM PST Mon Jan 26 2026
(Today and tonight)
Progressive short wave troughing today will give way to progressive
ridging tonight with the ridge axis shifting east of our area by
early Tuesday morning. Patchy fog is expected to develop overnight
in portions of the North Bay, East Bay and South Bay with coverage
or duration not expected to necessitate an advisory attm. Southerly
boundary layer winds combined with weak offshore surface winds will
help lift temperatures a few degrees across the interior from
Sundays highs, remaining right around the same along the coast.
Cloudy skies this morning will give way to a mix of sun and clouds
this afternoon, especially inland further helping the modest
temperature increases.
&&
.LONG TERM...
Issued at 325 AM PST Mon Jan 26 2026
(Tuesday through Sunday)
Extended forecast remains on track with rain chances increasing
Tuesday evening, continuing through Wednesday morning. HiRes
HRRR/RRFS focus primarily on the North Bay struggling to reach 0.10"
with NBM PoPs possibly a little overdone with chances to the south
as the best lift associated with the surface boundary continuing to
shift north of our area. Drier conditions will persist for the
remainder of the week with persistent ridging while the signal for
another round of scattered light beneficial rain next weekend
beginning to fade while temperatures trend warmer for the weekend,
especially across the Central Coast.
&&
.AVIATION...
(18Z TAFS)
Issued at 930 AM PST Mon Jan 26 2026
Mostly VFR conditions through the TAF period. High clouds will
move over the region early in the forecast period and increase on
Tuesday and become more widespread ahead of an approaching frontal
boundary. Winds will mostly remain light through the TAF period
with wind directions being determined by mostly localized effects.
Only expecting reduced visibilities at STS early Tuesday morning
with the potential for fog do develop in the Russian River Valley
and 4-6 SM HZ at LVK.
Vicinity of SFO...VFR through the TAF period. Expect mostly light
to moderate northeast winds through the late morning becoming
northwesterly late afternoon. Winds become lighter into the
evening, before moderate southwesterly winds develop early
Tuesday.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR through the TAF period. Light to
moderate southerly winds will become northwesterly by this
afternoon. Winds will become southerly late this evening and
persist into Tuesday morning, increasing to moderate around SNS.
&&
.MARINE...
(Today through Saturday)
Issued at 930 AM PST Mon Jan 26 2026
Mostly light winds continue to affect the waters with more
moderate to breezy winds north of Point Reyes. Winds diminish on
Wednesday and switch to northerly that night. Moderate seas will
prevail through Tuesday. Conditions deteriorate Wednesday as seas
build to become rough to very rough. Additionally, a weak passing
storm system will bring light rain to the coastal waters early
Tuesday morning through Wednesday morning.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 AM to 9 PM PST Tuesday for Pt Arena
to Pt Reyes 0-10 nm.
Small Craft Advisory from 9 PM this evening to 9 PM PST Tuesday
for Pt Arena to Pt Reyes 10-60 NM.
&&
$$
SHORT TERM...JM
LONG TERM....JM
AVIATION...RGass
MARINE...RGass
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Prepared by Boulder-Creek.com Weather at: Mon Jan 26 10:30:03 PST 2026
From the National Weather Service
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