FXUS66 KMTR 011741
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
941 AM PST Sun Feb 1 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 158 AM PST Sun Feb 1 2026

 - Above normal temperatures and dry conditions through the week

 - Minor coastal flooding today during high astronomical tide for
   bayshore locations along the San Francisco Bay, San Pablo Bay,
   and Monterey Bay

 - Hazardous beach conditions through Monday at Pacific Coast
   beaches

&&

.SHORT TERM...
Issued at 158 AM PST Sun Feb 1 2026
(Today and tonight)

Fog has been observed overnight in the North Bay and East Bay 
Interior Valleys. High clouds streaming in from a dying cold front 
are adding complexity to the fog forecast both in terms of viewing 
it from space via satellite as well as seemingly not letting it get 
widespread like initially thought. Still, if you are driving this 
morning, slow down, use your low-beam headlights, and leave plenty 
of distance ahead of you. The aforementioned cold front will be the 
main feature today. Rain can be seen to the north on our neighbor 
Eureka's radar, but this is not expected to hold together down here. 
Instead, what we can expect is a pause in the warming trend, a 
return of onshore flow, and an extra colorful sunrise/sunset from 
the cloud shield. One more round of minor coastal flooding is 
expected during high astronomical tide this morning for bayshore 
locations along the San Francisco Bay, San Pablo Bay, and Monterey 
Bay. Hazardous beach conditions continue at Pacific Coast beaches, 
read more in the BEACHES section.

&&

.LONG TERM...
Issued at 158 AM PST Sun Feb 1 2026
(Monday through Saturday)

A warming trend commences Monday and peaks Wednesday as longwave 
upper-level ridging builds into place and sets up its axis over the 
region. Sensible weather wise, this will result in temperatures of 
10 degrees above normal. Global ensemble clusters are in agreement 
that the aforementioned ridge will begin to get shoved east on 
Thursday by upper-level shortwave troughing that will skirt the 
region Friday into Saturday. This will relatively cool temperatures 
with no rain in the official forecast.

&&

.AVIATION...
(18Z TAFS)
Issued at 923 AM PST Sun Feb 1 2026

Fog has been localized this morning to the North Bay and East Bay
Valleys with visibilities as low as 1/4SM reported at STS and 
LVK. Any lingering fog will mix-out as the morning progresses 
with some afternoon haze. Winds this afternoon will generally be
onshore up to 10 kt. Best potential for overnight fog development
will be in the usual fog-prone North Bay and East Bay Valleys.

Vicinity of SFO...VFR conditions are forecast to prevail. Light
winds this morning will become west/northwest up to 10 kt in the 
afternoon. 

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR. Light offshore morning winds will 
switch onshore around mid-day. Low confidence with overnight 
fog/stratus.

&&

.MARINE...
(Today through Friday)
Issued at 923 AM PST Sun Feb 1 2026

Hazardous marine conditions return today with building seas and
increasing northerly winds. Conditions improve Tuesday with
moderate seas and a gentle northerly breeze prevailing through
Thursday.

&&

.BEACHES...
Issued at 333 AM PST Fri Jan 30 2026

Hazardous beach conditions will continue through Monday at all
Pacific Coast beaches. Long period westerly swell will bring an 
increased risk for sneaker waves and strong rip currents with 
breaking waves of 14 to 19 feet. Remember: stay off of jetties,
piers, rocks, and other waterside infrastructure, remain out of
the water, and never turn your back on the ocean! 

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Monday morning for CAZ006-505-
     509-529-530.

     Coastal Flood Advisory until noon PST today for CAZ006-506-508-
     529-530.

PZ...Small Craft Advisory from 3 PM this afternoon to 3 PM PST Monday 
     for Pt Arena to Pt Reyes 0-10 nm.

     Small Craft Advisory from 9 PM this evening to 3 PM PST Monday 
     for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras 
     Blancas 0-10 nm.

     Small Craft Advisory until 3 PM PST this afternoon for Pt Pinos 
     to Pt Piedras Blancas 0-10 nm.

     Small Craft Advisory until 9 PM PST Monday for Pigeon Pt to Pt 
     Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.

&&

$$

SHORT TERM...Sarment
LONG TERM....Sarment
AVIATION...Rowe
MARINE...Rowe

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Prepared by Boulder-Creek.com Weather at: Sun Feb 1 10:30:03 PST 2026