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NWS Technical Weather Discussion


FXUS66 KMTR 280025
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
425 PM PST Thu Nov 27 2025

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1235 PM PST Thu Nov 27 2025

 - Warm temps for areas south of San Jose, Tule fog keeping temps
   cooler further north.

 - Persistence forecast for the next several days (not much change
   in day-to-day)

 - No precip in the forecast. Need to look towards the middle of
   the month for next chance.

&&

.SHORT TERM...
Issued at 1235 PM PST Thu Nov 27 2025
(This evening through Friday)

~gobble gobble~

Sun for most and really frustrating stratus and Tule fog for a few
others. Forecast today remains mostly on track, except
temperatures in the North Bay and inland East Bay where I've
lowered high temps to account for the lingering fog and stratus.
Notable places like Santa Rosa, Napa, and Livermore have barely
broken 50 degrees as of 1-2pm. This pattern is likely to persist
into tomorrow.

&&

.LONG TERM...
Issued at 1235 PM PST Thu Nov 27 2025
(Friday night through next Wednesday)

The persistence forecast is a good bet for the next few days as a
very high amplitude ridge builds into the Gulf of Alaska and
promotes downstream troughing into the continental US. This
pattern results in light offshore flow for our region, which will
mostly keep temps mild and skies mostly dry. On that note, there
is no precipitation in our forecast through the next seven days.

&&

.AVIATION...
(00Z TAFS)
Issued at 425 PM PST Thu Nov 27 2025

Currently VFR with potential for fog and stratus to return tonight. 
Moderate to high confidence in stratus reaching STS, APC, and LVK 
tonight with some potential for lowered visibilities and ceiling 
heights throughout the rest of the Bay Area. The marine layer looks 
to deepen to around 1200 ft tonight which may bring in some stratus 
coverage along the coastline. Highest confidence that stratus will 
reach HAF but some may reach MRY early tomorrow morning as well. 
Winds generally stay light and offshore overnight before becoming 
light and onshore during the day tomorrow.

Vicinity of SFO...VFR through the rest of the evening. Given the 
current fog/stratus setup, continued to lean towards a persistence 
forecast with MVFR-IFR conditions developing at least temporarily 
tomorrow morning.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR. Some potential for MVFR CIGs at MRY 
early tomorrow morning as stratus returns along the coast. 
Confidence is too low to include in TAFs with models keeping the 
stratus directly along the coastline/away from the airport.

&&

.MARINE...
(Tonight through next Wednesday)
Issued at 425 PM PST Thu Nov 27 2025

Moderate to fresh northerly winds through Friday as a weak front
moves through the northern waters. Winds will be strongest south
of Point Pinos tonight. Winds will decrease Saturday before
increasing again early Sunday. Occasional squared seas will lead
to hazardous conditions over the outer waters through Friday.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...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 until 9 AM PST Friday for Pt Arena to Pt 
     Reyes 10-60 NM.

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

&&

$$

SHORT TERM...Behringer
LONG TERM....Behringer
AVIATION...Kennedy
MARINE...MM

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Prepared by Boulder-Creek.com Weather at: Thu Nov 27 18:30:02 PST 2025

From the National Weather Service


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Revised: 29 Mar 2008 09:53 -0800 GMT (Pacific)