FXUS66 KMTR 271126 CCA
AFDMTR

Area Forecast Discussion...CORRECTED
National Weather Service San Francisco CA
326 AM PST Thu Nov 27 2025

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 303 AM PST Thu Nov 27 2025

 - Dense Fog Advisory in effect until 10AM PST for the North Bay 
   Interior Valleys and East Bay Interior Valleys

 - Pleasant Thanksgiving Day area wide

 - Cooler temperatures set in for Friday and the remainder of the
   extended forecast

&&

.SHORT TERM...
Issued at 303 AM PST Thu Nov 27 2025
(Today and tonight)

Forecast remains on track for a very pleasant Thanksgiving Day 
across our area. Portions of the North Bay Interior Valleys and East 
Bay Interior Valleys (both have a Dense Fog Advisory in effect until 
10am PST this morning) may have to wait until later this morning to 
start basking in the ample sunshine and light winds awaiting most
of us for the afternoon and early evening. A weak disturbance to 
our north weakens H50 heights later today and overnight before 
amplified ridging is reestablished in the Pacific Northwest.

&&

.LONG TERM...
Issued at 303 AM PST Thu Nov 27 2025
(Friday through Wednesday)

A relatively weak, dry cold front extending from the aforementioned 
disturbance tracking out of the Pacific Northwest into the 
Intermountain West by early Friday will cool our temperatures down 
to near seasonal averages into the weekend. By late Sunday, the 
Polar Jet amplifies further with little to no impacts on our ambient 
weather other than reinforcing the cooler temperatures through 
the remainder of the extended forecast. The pattern appears to be 
unsettled for the second half of next week, but consensus in the 
deterministic guidance that far out has been even more elusive 
recently than it normally is.

&&

.AVIATION...
(12Z TAFS)
Issued at 324 AM PST Thu Nov 27 2025

LIFR-VLIFR conditions have developed across the North and East Bay 
valleys with low confidence of further impacts to the main Bay Area 
terminals through the mid-morning hours. Stratus retreats to the 
Central Valley and adjacent areas in the far interior East Bay 
through the late morning hours. Light to moderate winds through the 
afternoon and evening with more onshore flow closer to the coast and 
continuing offshore winds inland. Low to moderate confidence of 
stratus returning to the Bay Area valleys tonight through Friday 
morning, highest in the North and East Bay valleys although some 
high resolution guidance also shows a stratus deck forming around 
SJC and migrating northwest towards SFO and OAK.

Vicinity of SFO... Moderate confidence VFR through the day with a 
possibility of LIFE stratus flowing in from the Delta through the 
morning. High cloud cover is making it difficult to gauge how close 
the stratus is to the terminal resulting in low confidence in timing 
of any potential stratus push, but not expecting the clouds to 
linger past 18Z. Moderate northwest winds develop in the afternoon 
before returning to a light flow overnight, with a low confidence 
(20-30% probability) that LIFR stratus impacts the terminal tonight 
through Friday morning. 

SFO Bridge Approach... Confidence is slightly higher (30-40% 
probability) that stratus impacts the approach path, especially 
towards the southern end of the San Francisco Bay. Otherwise similar 
to SFO.

Monterey Bay Terminals... Moderate to high confidence for VFR 
through the TAF period, with high cloud cover obscuring any possible 
stratus layer over the southern Salinas Valley. Light to gentle 
drainage winds will turn moderately onshore in the afternoon and 
evening before resuming tonight. Some high resolution models are 
picking up on stratus potential Friday morning but this should fall 
after the end of the TAF period.

&&

.MARINE...
(Today through Tuesday)
Issued at 324 AM PST Thu Nov 27 2025

Dense fog has developed across the West Delta and may extend into
the San Pablo Bay, expected to dissipate after sunrise. Moderate
to fresh north winds are expected to develop today and Friday.
Winds will decrease Saturday but pick up to a moderate to fresh
north breeze on Sunday, with lighter winds expected for the early
part of next week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Dense Fog Advisory until 10 AM PST this morning for CAZ506-510.

PZ...Dense Fog Advisory until 10 AM PST this morning for SF Bay N of 
     Bay Bridge.

     Small Craft Advisory from 9 AM to 9 PM PST Friday for Pigeon Pt 
     to Pt Pinos 0-10 nm.

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

     Small Craft Advisory from 3 PM this afternoon to 9 AM PST Friday 
     for Pt Arena to Pt Reyes 10-60 NM.

     Small Craft Advisory from 3 PM this afternoon to 9 PM PST Friday 
     for Pigeon Pt to Pt Pinos 10-60 NM.

&&

$$

SHORT TERM...JM
LONG TERM....JM
AVIATION...DialH
MARINE...DialH

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Prepared by Boulder-Creek.com Weather at: Thu Nov 27 04:30:02 PST 2025