FXUS66 KMTR 222335
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
435 PM PDT Wed Jul 22 2026
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 1234 PM PDT Wed Jul 22 2026
- Breezy onshore winds return late this week and into the
weekend
- Temperatures near seasonal averages throughout early next week
&&
.SHORT TERM...
Issued at 1234 PM PDT Wed Jul 22 2026
(This evening through Thursday night)
The marine layer redeveloped overnight to around 1,800 feet in
depth and resulted in inland expansion of coastal stratus.
Southwest winds also resulted in favored locations in the Santa
Cruz Mountains and Marin Coastal Range (Mount Tamalpais) to see
drizzle and light rain at times with up to 0.16" of precipitation.
With southwesterly winds forecast to persist through early this
afternoon, places such as the North Bay and Monterey Bay region
may only see stratus scatter out for a few hours this afternoon.
As dewpoint temperatures remain in the upper 50s to lower 60s, it
will remain muggy feeling throughout much of the day with higher
humidity regionwide. Temperatures regionwide have fallen to
slightly below average while the North Bay region is expected to
be as much as 15 degrees below average.
As winds shift more out of the northwest late this evening and
into the overnight across the coastal waters, expecting inland
expansion of the stratus once again with a return to a more
typical summertime pattern. There is again the potential for
mist/drizzle again tonight, yet will be less widespread. Low
clouds that do develop inland are forecast to retreat to the coast
by mid-to-late morning and especially so by Thursday afternoon.
Maximum afternoon temperatures on Thursday are forecast to range
in the upper 50s to lower 70s near the coast, in the 70s bayside,
and 80s to lower 90s in the interior. The southern portion of the
Central Coast has the greatest potential to exceed 100 deg F in
places such as Lockwood, Bradley and Parkfield.
&&
.LONG TERM...
Issued at 1234 PM PDT Wed Jul 22 2026
(Friday through next Tuesday)
The ridge currently over the Southern Plains is forecast to shift
westward towards the Four Corners region over the weekend. This will
work to compress our marine layer and allow for a slight warming
trend across the interior. However, temperatures will remain within
a few degrees of seasonal averages into early next week. As such,
expecting typical ebb and flow of stratus returning into the valleys
overnight and retreating to the coast by mid-to-late morning.
&&
.AVIATION...
(00Z TAFS)
Issued at 415 PM PDT Wed Jul 22 2026
VFR through the evening hours with KSTS being the only exception
due to a local offshore circulation (otter eddy) continuing to
push stratus over the coastal range. All terminals are expected to
drop into MVFR during the overnight hours with low confidence for
timing and extent of potential IFR/LIFR ceilings headed into the
hours before sunrise. Expect clearing time to extend into late
morning/early afternoon.
Vicinity of SFO...Gusty onshore flow this evening will ease after
sunset with MVFR ceilings expected after midnight and late
clearing times into the early afternoon. Onshore flow increases
once again, becoming gusty Thursday afternoon.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...Coastal stratus rapidly cleared over the
past hour. Return of IFR stratus is expected later this evening
and is expected to persist into the early afternoon on Thursday,
with VFR expected for the remainder of the TAF period, and breezy
afternoon onshore flow.
&&
.MARINE...
(Tonight through next Monday)
Issued at 415 PM PDT Wed Jul 22 2026
Winds will continue to veer to the northwest overnight, then
increase through the day Thursday into Friday. Moderate
northwesterly flow will persist through the weekend and into next
week. Significant wave heights will remain moderate this week
before long period southerly swell from Hurricane Fausto reaches
the coastal waters this weekend.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 9 AM to 9 PM PDT Thursday for Mry Bay.
Small Craft Advisory from 3 PM Thursday to 3 AM PDT Friday for
Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm.
Small Craft Advisory from 9 AM Thursday to 3 AM PDT Friday for
Pigeon Pt to Pt Pinos 0-10 nm.
Small Craft Advisory from 9 PM this evening to 3 PM PDT Friday
for Pt Pinos to Pt Piedras Blancas 0-10 nm.
&&
$$
SHORT TERM...RGass
LONG TERM....RGass
AVIATION...JM
MARINE...CW
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Prepared by Boulder-Creek.com Weather at: Wed Jul 22 20:30:03 PDT 2026
From the National Weather Service
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