FXUS66 KMTR 092358
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
458 PM PDT Mon Mar 9 2026
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 120 PM PDT Mon Mar 9 2026
- Near normal temperatures today and Tuesday
- Breezy conditions along the coast and coastal mountains today
- Above normal temperatures return Wednesday, warming to well
above normal into next weekend
&&
.SHORT TERM...
Issued at 120 PM PDT Mon Mar 9 2026
(This evening through Tuesday)
Another pleasant day across the region this afternoon under mostly
sunny skies. Temperatures are forecast to warm into the lower 60s
near the coast and into the mid 70s across the interior. However,
these temperatures are still some 3-10 degrees above seasonal
averages. Tonight, there is moderate confidence for low clouds to
return to the Monterey Bay region and coastal areas late this
evening and linger into early Tuesday morning. Elsewhere, mostly
clear sky conditions are forecast to prevail. Thus, Tuesday
morning's low temperatures are forecast to largely be in the lower
40s (North Bay Valleys) to upper 40s regionwide.
For Tuesday afternoon, expecting slightly cooler temperatures than
today as a weak dry frontal boundary sags southward across the
region. However, temperatures will be closer to normal with low 60s
near the coast and upper 60s to lower 70s across the interior.
&&
.LONG TERM...
Issued at 120 PM PDT Mon Mar 9 2026
(Tuesday night through next Sunday)
The warming trend will begin on Wednesday as high pressure from the
west begins to build into the region. The warming trend is
anticipated to continue into this weekend and potentially even into
early next week. By Sunday and Monday, temperatures in the warmest
interior spots have a 50%-90% probability of exceeding 90 degrees F.
These temperatures would be 15-25 degrees above seasonal averages if
they were to materialize. However, we are not anticipating any
strong offshore winds with this event as the center of the high
pressure builds right overhead.
Overnight and early morning temperatures will also warm into the
upper 40s to middle 50s Friday and Saturday mornings. These values
warm into the mid-to-upper 50s by Sunday morning. As such, we are
currently forecasting Moderate HeatRisk across much of the region
this upcoming weekend. As such, no rain chances are expected through
the next 7 days and potentially through the next 14 days. Stay tuned
as we refine the forecast throughout the remainder of the week and
into the weekend.
&&
.AVIATION...
(00Z TAFS)
Issued at 446 PM PDT Mon Mar 9 2026
Strong NNW winds will continue along the coast through the TAF
period. These will directly impact HAF and periodically reach the
other coastal terminals throughout the TAF period. The stratus
coverage overnight will likely be similar to yesterday (impacts at HAF,
MRY and SNS), but a deeper marine layer and stronger winds will
bring higher ceiling heights and less chance for fog formation.
Vicinity of SFO...WNW winds are funneling through the San Bruno
gap bringing ocassional gusts above 25 knots. These strong winds
will continue through the evening before decreasing overnight as
the lower atmosphere stabilizes. There is 20% chance of MVFR
ceilings early Tuesday morning, with VFR conditions more likely.
Strong WNW winds will return Tuesday afternoon.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...The Monterey Bay eddy will again pump low
level moisture to both MRY and SNS this evening. There is a good
chance for ceilings at both terminals, but the height is a little
harder to pin down. The marine layer is expected to be deeper than
last night, which should keep them in the 700-1500 foot range.
Stronger surface winds should help limit fog formation tonight as
well.
&&
.MARINE...
(Tonight through next Saturday)
Issued at 446 PM PDT Mon Mar 9 2026
The gradient between strong high pressure in the Eastern Pacific
and lower pressure over California is supporting strong to near
gale force NW winds across the exposed coastal waters. These winds
are building very rough seas of 12-15 feet. Gale conditions will
continue through late Tuesday night before decreasing to a fresh
to strong NW breeze for the rest of the week.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Gale Warning until 3 PM PDT Tuesday for Pt Arena to Pt Reyes 0-
10 nm.
Small Craft Advisory until 3 AM PDT Wednesday for Pigeon Pt to
Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt
Reyes to Pigeon Pt 0-10 nm.
Gale Warning until 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos
10-60 NM-Pt Arena to Pt Reyes 10-60 NM.
&&
$$
SHORT TERM...RGass
LONG TERM....RGass
AVIATION...Flynn
MARINE...Flynn
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Prepared by Boulder-Creek.com Weather at: Mon Mar 9 18:30:02 PDT 2026
From the National Weather Service
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