FXUS66 KMTR 241739
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
1039 AM PDT Sat Oct 24 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 914 AM PDT Sat Oct 24 2026

 - Near normal temperatures this weekend, cooling to slightly
   below normal through the remainder of the upcoming week

 - Coastal flooding due to astronomical high tides and thermal 
   expansion this weekend through Thursday

&&

.UPDATE...
Issued at 914 AM PDT Sat Oct 24 2026

Offshore winds are diminishing across the Mayacamas and Vaca 
mountain ranges with Mount Saint Helena gusting to 40 mph currently 
(peaked at 63 mph at 1:10 AM PDT). Aside from some patchy fog in the 
southern portion of the Salinas Valley, skies are clear across much 
of the region. No updates anticipated this morning as the ongoing
forecast remains on track. 

RGass

&&

.SHORT TERM...
Issued at 1038 PM PDT Fri Oct 23 2026
(Today and tonight)

Gusty offshore flow across the North Bay Interior Mountains is 
ongoing tonight, with the windy and dry conditions dropping MinRH 
values in the 20s for some locations. Fire weather concerns would be 
higher for this area had we not received the recent wetting 
rainfall. The offshore flow regime should mostly limit fog 
development early this morning but still can't be ruled out entirely 
in some of the river valleys in Sonoma County.

Temperatures today will be around 5 degrees warmer than Friday and 
near normal for this time of year. The gusty winds across the North 
Bay will begin to ease by late this morning, with a beautiful day in 
store area wide across our CWA as upper level ridging builds 
overhead.

&&

.LONG TERM...
Issued at 1038 PM PDT Fri Oct 23 2026
(Sunday through next Friday)

Sunday will almost be a carbon copy of today for the North Bay and 
Bay Area, with the Central Coast seeing temperatures warm another 
few degrees. Confidence and consensus in the synoptic pattern is 
poor after Monday. An upper trough shifts south to our latitude on 
Monday bringing a return of onshore flow, however the overall 
progressive pattern is struggling with the depth of the trough and 
how another system well offshore interacts with the flattening 
trough as it moves into the Great Basin. Despite the uncertainty in 
the overall pattern, any troughing or ridging will continue to be 
progressive and low amplitude, with no large temperature fluctuations 
or precipitation chances until the end of next week when the NBM 
seems to pick up on what the current ECMWF deterministic has 
depicted for next Friday into the weekend, troughing with increasing 
rain chances.

&&

.AVIATION...
(18Z TAFS)
Issued at 1039 AM PDT Sat Oct 24 2026

Quiet weather and VFR conditions are expected over the TAF cycle. 
Some high clouds should start to move into the region on Sunday, as 
a upper low moves into the PacNW. 

Vicinity of SFO...Quiet weather and VFR conditions will prevail 
through the TAF cycle. Winds are expected to become onshore this 
afternoon and continue into the evening, with lighter and variable 
winds returning for the overnight hours. 

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...The forecast will be on repeat as we go 
from offshore wind to onshore winds this afternoon. Later this 
evenings, winds will revert and become lightly offshore again. 

&&

.MARINE...
(Today through Thursday)
Issued at 914 AM PDT Sat Oct 24 2026

Gentle to moderate northerly breezes persist into early next week
while becoming northwesterly with occasional fresh gusts. Rough
seas will continue to gradually subside to moderate by Sunday and
remain so through much of next week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Coastal Flood Advisory until 3 PM PDT Thursday for CAZ006-506-
     508-529-530.

     Coastal Flood Advisory from 9 AM Monday to 3 PM PDT Thursday for 
     CAZ505-509.

PZ...None.
&&

$$

SHORT TERM...JM
LONG TERM....JM
AVIATION...KR
MARINE...KR

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Prepared by Boulder-Creek.com Weather at: Sat Oct 24 12:30:02 PDT 2026