National Weather Service United States Department of Commerce

Flood Threat For Several Locations Today

The active monsoon season will continue the rest of the week and the flood threat today stretches from the Arizona to portions of the Intermountain West. Meanwhile, a humid and moist air mass ahead of a cold front may result in heavy rain and flooding from the Mid-Atlantic to the eastern Ohio and Tennessee Valleys. Finally, slow moving storms may produce flooding for the central Gulf Coast states. Read More >


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FXUS66 KMTR 101732

Area Forecast Discussion
National Weather Service San Francisco Bay Area
1032 AM PDT Wed Aug 10 2022

.SYNOPSIS...Temperatures remain at seasonal normal values through
the week with breezy onshore winds in the afternoon and marine stratus
returning at night. High pressure grows into the weekend
providing a subtle warming and drying trend, mainly for interior

&& of 02:45 AM PDT Wednesday...Not a whole lot of
change in the weather compared to 24 hours ago. Patchy stratus has
developed in the Bay Area tonight and is visible via nighttime
satellite imagery. The SFO-SAC gradient is around +1.5 mb so
onshore wind push is not as strong tonight so not expecting
widespread stratus coverage. Synoptically, the Bay Area and
Central Coast regions remain wedged between an upper level low to
the west and broad high pressure to the east. This low off the
coast of the CA/OR border continues to move north up the coast at
a slow pace. With the current position of this low, some colder
air has advected into the Central Coast and Bay Area which has
resulted in cooler temperatures tonight about a few degrees cooler
than 24 hours ago.

Tomorrow will bring seasonable weather, which will feel similar to
what we`ve been experiencing, with temps near the coast reaching low
to mid 70s and regions further inland in the 80s. Warmer spots of
our cwa (interior Monterey and San Benito counties) will be in the
mid 90s tomorrow. As the aforementioned low continues inching
northward up the coast, high pressure is still on track to build
in from the east. This will lead to a slight and gradual warming
trend in the interior that will take place starting tomorrow and
lasting through the weekend. This warming trend will not result in
oppressive heat, just will raise temperatures in the interior by
up to 5 degrees by the weekend. By the weekend, interior valleys
will be in the 90s and hot spots such as S. Monterey county will
be around 100 degrees. With high pressure gradually backbuilding
into our region, marine layer should also become more defined and
shallow as the week progresses.


.AVIATION... As of 10:30 AM Wednesday... For the 18Z TAFs. Marine
layer clouds are dissipating in the area near San Francisco Bay, and
conditions have improved to MVFR or VFR ceilings across the region.
Winds increasing this afternoon with breezy winds generally from the
northwest. Stratus coverage tonight expected to be more expansive
than what was seen this morning, with moderate confidence of stratus
at the North Bay terminals, and somewhat lower confidence at SJC and
SNS. Stratus should clear from the main terminals from 16-17 z.

Vicinity of KSFO... VFR for the rest of the day. Winds from the
west, gusting to 22 knots this afternoon. Overnight stratus should
filter in through the Golden Gate, with low to moderate confidence
in IFR ceilings over SFO. Stratus clears by 17 z; winds are expected
to be stronger on Thursday afternoon with gusts approaching 30 knots.

KSFO Bridge Approach... Similar to SFO.

Monterey Bay... VFR for the rest of the day, with northwest winds
around 10-15 knots. Stratus is expected to fill in this evening, but
low confidence in timing for the early part of the night. By 09 z,
LIFR conditions are expected at MRY with low confidence of LIFR
conditions at SNS. Stratus coverage should clear by around 16-17

&& of 10:32 AM PDT Wednesday...Light winds persisting
across the waters this morning with locally strong northwest
winds south of Point Pinos, especially near the Big Sur coastal
jet. Winds increasing Wednesday afternoon along the immediate
coastal waters from Point Arena to Point Reyes, from Pigeon Point
to the Santa Cruz Harbor, and from Point Lobos down the Big Sur
coast, and through the Golden Gate. Winds increase across the
rest of the waters late Wednesday and Thursday, creating
hazardous conditions for smaller vessels. Light southerly swell of
12 to 14 seconds continues through the end of the week.


.Tday...SCA...Pigeon Pt to Pt Pinos 0-10 nm from 3 PM
SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
SCA...SF Bay from 3 PM
SCA...Mry Bay from 3 PM
SCA...Pt Arena to Pt Reyes 0-10 nm from 3 PM




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