FXUS66 KMTR 170038
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
438 PM PST Fri Jan 16 2026
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 108 PM PST Fri Jan 16 2026
- Cool mornings, but very mild afternoons into the weekend
- Morning fog across the delta and interior valleys
&&
.SHORT TERM...
Issued at 108 PM PST Fri Jan 16 2026
(This evening through Saturday)
Once again, the North Bay Valleys have cleared out of the fog
with some still lingering across the far interior East Bay
Valleys. With high pressure aloft, it is another very warm day
across the region. This is especially so across the Central Coast
with temperatures already in the upper 60s to low 70s. In the
higher terrain across all of the region, temperatures range from
the mid 70s to low 80s.
Tonight, expecting another round of fog to develop across the
West Delta, North Bay Valleys, and East Bay Valleys as similar
conditions are likely.
Tomorrow, similar conditions as today are expected across much of
the region as the high pressure largely remains the dominate
feature and offshore winds in the higher elevations persist.
&&
.LONG TERM...
Issued at 1241 AM PST Fri Jan 16 2026
(Saturday through Thursday)
Nice, dry weather will continue for the next several days. Some
high clouds will roll in from the south this weekend, which should
moderate both max and min temperatures a bit, while producing
some colorful sunrises and sunsets. Ensemble cluster analysis
shows high confidence that the strong ridge at 500 mb over the
Gulf of Alaska will gradually erode over the next 5-7 days. The
uncertainty grows beyond the middle of next week, but either zonal
flow or a troughing pattern seems more likely than continued
ridging. While the change at the surface will be subtle, onshore
flow will gradually return, high temperatures will cool a few
degrees, and coastal clouds will start creeping back in by the
middle of next week. If the pattern becomes more active, there is
a chance for very light rain as early as next Thursday, with a
stronger signal for more substantial precipitation by the middle
of the following week (end of January).
&&
.AVIATION...
(00Z TAFS)
Issued at 438 PM PST Fri Jan 16 2026
Surface high pressure continues over the Great Basin resulting in
offshore winds. The WMC-SFO pressure gradient is 11.3 mb and SAC-
SFO is 0.6 mb. VFR continues in the 00z TAFs except for areas of
hazy conditions reducing surface (and slantwise visibility especially
at sunset/sunrise) visibility to MVFR. Patchy fog /VLIFR-IFR/ also
developing tonight and Saturday morning.
Vicinity of SFO...VFR. Mainly light wind.
SFO Bridge Approach...Slantwise visibility may be reduced especially
at sunset/sunrise, otherwise similar to SFO.
Monterey Bay Terminals...VFR. Light onshore winds becoming east
to southeast 5 to 10 knots tonight and Saturday morning, then
shifting to onshore 5 to 10 knots late Saturday afternoon.
&&
.MARINE...
(Tonight through next Thursday)
Issued at 409 PM PST Fri Jan 16 2026
Locally breezy winds expected across the San Pablo Bay, the delta,
and through the Golden Gate Gap through this weekend. Elsewhere,
light northeasterly to northerly winds persist through the forecast
period. Light seas continue into early next week before our next
round of long period swell arrives and brings light to moderate
seas.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.
&&
$$
SHORT TERM...RGass
LONG TERM....Flynn
AVIATION...Canepa
MARINE...Kennedy
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Prepared by Boulder-Creek.com Weather at: Fri Jan 16 20:30:02 PST 2026
From the National Weather Service
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