San Juan Bautista, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

464
FXUS66 KMTR 070744
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
1244 AM PDT Sat Jun 7 2025

...New SYNOPSIS, SHORT TERM, LONG TERM...

.SYNOPSIS...
Issued at 1244 AM PDT Sat Jun 7 2025

Generally stable conditions through the middle of next week with
seasonally warm temperatures inland, cooler temperatures along the
coast, and morning clouds throughout the coast and the inland
valleys. A cooling trend arrives for the end of next week.

&&

.SHORT TERM...
(Today and tonight)
Issued at 1244 AM PDT Sat Jun 7 2025

The general weather situation remains remarkably stable today, with
an upper level ridge to our north and a weak closed low off the
California coast. Satellite imagery is showing stratus across the
coast, building inland across the Sonoma County valleys, the Bayside
East Bay, and the northern Salinas Valley. Expect the stratus to
continue building inland through the morning hours, with the inland
areas clearing out by the afternoon while low clouds linger at the
immediate coast. Today`s forecast high temperatures are generally
similar to yesterday`s, with highs in the lower to middle 80s in the
interior valleys, as high as the middle 90s in the southern reaches
of Monterey County, around the upper 60s to the upper 70s in the
Bayshore, and the lower to middle 60s along the Pacific coast. An
onshore breeze is expected this afternoon and evening with gusts of
20-30 mph through the gaps, passes, and the northern Salinas
Valley.

&&

.LONG TERM...
(Sunday through Friday)
Issued at 1244 AM PDT Sat Jun 7 2025

In light of the stable pattern over the next few days, the long term
forecast discussion will be given via a series of haikus:

Extended outlook,
Weather remains quite stable
Through middle next week.

Upper level ridge
Moves through Pacific Northwest
Before eroding.

Cutoff low will drift
Off coast of California
Until Sunday night.

Deeper open trough
Arrives middle of next week
From Gulf of AK.

Cooling trend shall come
As the trough builds over us
Through end of next week.

CPC suggests
Seasonal to cool temps reign
Beyond seven days.

&&

.AVIATION...
(06Z TAFS)
Issued at 927 PM PDT Fri Jun 6 2025

Coastal stratus /MVFR possibly IFR/ continues to fill back in
along the immediate coastline per surface observations and
satellite imagery. A weak low pressure area straddles the CA
coastal waters and offshore waters. Post sunset surface pressure
gradients and winds are already easing in response to nocturnal
cooling and a decrease in land vs sea surface temps, leaving the
onshore SFO-SAC pressure gradient/wind to predominate and usher in
stratus and/or fog tonight and Saturday morning. The marine layer
depth varies from several hundred feet to 1700 feet.

The aforementioned low pressure area will slowly drift southwest
tonight and Saturday, which should allow a surface ridge of high
pressure to build in over the coastal waters mainly resulting in
strengthening SFO-SAC pressure gradient/wind this time tomorrow;
just don`t know with certainty, will have to closely monitor.

Vicinity of SFO...So far the stratus is staying on the ocean side
of the SF Peninsula keeping VFR going at SFO this evening.
However, stratus is forecast to arrive at SFO tonight and Saturday
morning. RAP model is pessimistic with low ceiling tonight and
Saturday morning at KSFO. Current forecast indicates VFR returning
by late morning Saturday (RAP model is near 100% humidity near
surface thru 18z-19z Saturday). West to northwest wind gusting to
25 knots this evening, near 10 knots overnight and Saturday
morning, west to northwest wind increasing to 25 knots Saturday
afternoon and early evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Onshore winds and nocturnal cooling are
resulting in stratus /MVFR-IFR/ with IFR tonight and Saturday
morning. Stratus and any lingering patchy fog will mix out late
Saturday morning. Winds becoming mainly onshore during the evening
and overnight 5 to 10 knots. Onshore winds Saturday afternoon and
early evening 10 to 15 knots. Stratus moving back inland Saturday
night and Sunday morning.

&&

.MARINE...
(Tonight through next Thursday)
Issued at 858 PM PDT Fri Jun 6 2025

A weak low pressure area will drift to the southwest over the
offshore waters tonight and Saturday. Breezes will become more
westerly on Saturday. Diurnal effects will bring a fresh to strong
SW breeze to the San Francisco Bay over the next couple
afternoons. A long period southwesterly swell arrives early next
week. Winds  and seas will rebuild more substantially mid to late
next week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this
     evening for SF Bay N of Bay Bridge.

&&

$$

SHORT TERM...DialH
LONG TERM....DialH
AVIATION...Canepa
MARINE...Canepa

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