FXUS66 KMTR 141147
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
447 AM PDT Tue Apr 14 2026
...New AVIATION, MARINE...
.KEY MESSAGES...
Updated at 1216 AM PDT Tue Apr 14 2026
- Slightly cooler to near normal temperatures continue through
Thursday
- Periods of gusty winds, especially at higher elevations
Wednesday afternoon through Friday morning
- Warmer temperatures return Friday and Saturday
- Confidence is increasing for widespread beneficial rain
beginning Sunday into the beginning of next week
&&
.SHORT TERM...
Issued at 1216 AM PDT Tue Apr 14 2026
(Today and tonight)
The upper level low that brought beneficial rainfall the past few
days has exited east with lingering low clouds overnight from the SF
Peninsula south into Monterey and the Salinas Valley, and farther
inland over the interior mountains of San Benito County. Low clouds
will linger across the Bay Area and Central Coast through mid-
morning today as a drier mid-level airmass filters in across our
area under shortwave ridging aloft, with mostly sunny skies in the
afternoon into the evening hours. High temperatures will begin their
gradual increase through midweek today, with only slight increases
from Mondays highs. Tonight into Wednesday morning will still be
on the chilly side of normal with mostly clear skies, relatively
light winds, and more efficient radiational cooling.
&&
.LONG TERM...
Issued at 1216 AM PDT Tue Apr 14 2026
(Wednesday through Monday)
Temperatures on Wednesday will be similar or slightly higher on the
backside of the progressive shortwave ridging. By Wednesday
afternoon, onshore flow will increase out ahead of a sharpening
trough that will bring gusty winds and a slight chance of rain
across northern portions of the North Bay. The better fetch of
onshore flow out ahead of the upper trough and associated surface
boundary will be short lived but will produce more widespread cloud
cover during the day and evening hours. Onshore flow will quickly
transition to north/northeast offshore flow overnight into Thursday
in the wake of the progressive upper trough. The gusty winds during
the day Thursday, especially above 1000ft are not expected to exceed
40 MPH with little impacts. Winds ease Friday, while a still
progressive but high amplitude ridge moves onshore producing a more
notable jump in temperatures Friday and Saturday to slightly above
normal for most locations. The active, progressive longwave pattern
continues by the end of the weekend into the beginning of next week
with an increasing signal for another round of widespread
beneficial rainfall.
&&
.AVIATION...
(12Z TAFS)
Issued at 447 AM PDT Tue Apr 14 2026
Pockets of fog are affecting the North Bay terminals while MVFR CIGs
are building for the rest of the TAF sites. CIGs and fog will erode
into the mid to late morning leading to widespread VFR for the
afternoon. Expect building winds into the afternoon, becoming
moderate to breezy. These winds reduce into the evening and early
night. MVFR-level CIGs return to the coast and HAF into the night.
These CIGs will be slower to build inland, but CIGs will be expected
at LVK, MRY, and SJC into the late night and early Wednesday.
Vicinity of SFO...Spotty MVFR CIGs linger into the mid morning
before eroding. Expect mostly moderate winds through the morning and
into the afternoon before breezy west winds build in the mid
afternoon. Winds reduce into the night, but remain moderate through
the end of the TAF period.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...MVFR CIGs last into the late morning with
mostly light winds. Expect CIGs to erode as winds build in the late
morning and early afternoon. Moderate west winds look to last into
the evening before reducing as scattered low clouds build into the
area. MVFR CIGs look to fill over MRY into the late night.
&&
.MARINE...
(Today through Sunday)
Issued at 447 AM PDT Tue Apr 14 2026
Moderate to fresh NW breezes and moderate build seas across the
exposed coastal waters into the mid week. A cold front will
increase winds to near gale force late Wednesday or early
Thursday, building rough seas. Winds and seas ease into the
weekend, but build again into the next work week with some chances
for rain.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this
evening for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm.
Small Craft Advisory from 9 PM Wednesday to 3 AM PDT Thursday
for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt
Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory until 3 AM PDT Wednesday for Pt Arena to Pt
Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory from 3 PM this afternoon to 3 AM PDT
Wednesday for Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory from 3 PM Wednesday to 3 AM PDT Thursday
for Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory from 3 PM this afternoon to 3 AM PDT
Thursday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
&&
$$
SHORT TERM...JM
LONG TERM....JM
AVIATION...Murdock
MARINE...Murdock
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Prepared by Boulder-Creek.com Weather at: Tue Apr 14 06:30:02 PDT 2026
From the National Weather Service
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