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FNUS86 KMTR 012222
FWLMTR

ECCDA Discussions
National Weather Service SAN FRANCISCO BAY AREA
322 PM PDT Mon Sep 1 2025

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##            Discussions from the latest FWF below                ##
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...Discussion from SFOFWFMTR...

It`s hot and dry inland while nearest the coast and bays within a
shallow marine layer, sea breezes are developing. An upper level low
300 miles southwest of San Francisco will continue to move
northeastward passing over the district late tonight and  Tuesday.
The low is surrounded by dry air at the moment, but will approach
closer to residual mid level moisture late tonight and Tuesday. The
primary concern is there is a very low i.e. non-zero probability of
high impact weather if any elevated showers, isolated dry lightning
and storm associated gusty outflow winds develop. Otherwise a cooling
trend sets in Tuesday and will continue through the remainder of the
extended forecast. Daily highs and lows will be closer to normal for
early September.


...Discussion from SFOFWFEKA...

Temperatures warm up early this week with triple  digits possible in
the warmest valleys by Tuesday. Afternoon RH  remains low and RH
recoveries are poor in the higher elevations.  Isolated dry
thunderstorms are possible in the interior, primarily  in Trinity
County, Tuesday. Gusty and erratic outflow winds of 40 to  60 mph
are possible with any storms that do form. Regardless of the
thunder threat, instability will support a breezy day, which will
elevate fire risk as conditions remain hot and dry. Wednesday
through the end of the week gradual cooling is expected with highs
mainly in the 80s by Saturday.


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##       Complete a discussion for each ECCDA segment below        ##
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ECC010-021030-
St Helena ECC Dispatch-
DISCUSSION FOR Marin and Sonoma and Napa Counties
322 PM PDT Mon Sep 1 2025

It`s hot and dry inland while nearest the coast and bays within a
shallow marine layer, sea breezes are developing. An upper level low
300 miles southwest of San Francisco will continue to move
northeastward passing over the district late tonight and  Tuesday.
The low is surrounded by dry air at the moment, but will approach
closer to residual mid level moisture late tonight and Tuesday. The
primary concern is there is a very low i.e. non-zero probability of
high impact weather if any elevated showers, isolated dry lightning
and storm associated gusty outflow winds develop. Otherwise a cooling
trend sets in Tuesday and will continue through the remainder of the
extended forecast. Daily highs and lows will be closer to normal for
early September.

$$

ECC014-021030-
Morgan Hill ECC Dispatch-
DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties
322 PM PDT Mon Sep 1 2025

It`s hot and dry inland while nearest the coast and bays within a
shallow marine layer, sea breezes are developing. An upper level low
300 miles southwest of San Francisco will continue to move
northeastward passing over the district late tonight and  Tuesday.
The low is surrounded by dry air at the moment, but will approach
closer to residual mid level moisture late tonight and Tuesday. The
primary concern is there is a very low i.e. non-zero probability of
high impact weather if any elevated showers, isolated dry lightning
and storm associated gusty outflow winds develop. Otherwise a cooling
trend sets in Tuesday and will continue through the remainder of the
extended forecast. Daily highs and lows will be closer to normal for
early September.

$$

ECC013-021030-
Felton ECC Dispatch-
DISCUSSION FOR Santa Cruz and San Mateo Counties
322 PM PDT Mon Sep 1 2025

It`s hot and dry inland while nearest the coast and bays within a
shallow marine layer, sea breezes are developing. An upper level low
300 miles southwest of San Francisco will continue to move
northeastward passing over the district late tonight and  Tuesday.
The low is surrounded by dry air at the moment, but will approach
closer to residual mid level moisture late tonight and Tuesday. The
primary concern is there is a very low i.e. non-zero probability of
high impact weather if any elevated showers, isolated dry lightning
and storm associated gusty outflow winds develop. Otherwise a cooling
trend sets in Tuesday and will continue through the remainder of the
extended forecast. Daily highs and lows will be closer to normal for
early September.

$$

ECC018-021030-
Monterey ECC Dispatch-
DISCUSSION FOR Monterey and San Benito County
322 PM PDT Mon Sep 1 2025

It`s hot and dry inland while nearest the coast and bays within a
shallow marine layer, sea breezes are developing. An upper level low
300 miles southwest of San Francisco will continue to move
northeastward passing over the district late tonight and  Tuesday.
The low is surrounded by dry air at the moment, but will approach
closer to residual mid level moisture late tonight and Tuesday. The
primary concern is there is a very low i.e. non-zero probability of
high impact weather if any elevated showers, isolated dry lightning
and storm associated gusty outflow winds develop. Otherwise a cooling
trend sets in Tuesday and will continue through the remainder of the
extended forecast. Daily highs and lows will be closer to normal for
early September.

$$