Richmond, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

679
FXUS66 KMTR 190008
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
508 PM PDT Wed Sep 18 2024

...New AVIATION, MARINE...

.SYNOPSIS...
Issued at 131 PM PDT Wed Sep 18 2024

Isolated to scattered rain showers continue into this evening,
tapering off from north to south gradually through Thursday
afternoon. A warming trend is on tap for by this upcoming weekend
and into early next week with temperatures rebounding to near
seasonal averages.

&&

.SHORT TERM...
(This evening through Thursday)
Issued at 131 PM PDT Wed Sep 18 2024

An upper level low remains off of the North Bay coast at this hour
and will continue to drop southward throughout the day before moving
onshore over the Central Coast tonight/tomorrow. As such, much of
the rainfall from this system will remain light and some locations
may not see any rainfall at all! There remains a slight chance of
thunderstorms across the North Bay this afternoon before the
thunderstorm threat focuses on the southern portion of the Central
Coast on Thursday. The threat generally remains less than 15%
however, so confidence of thunderstorm development remains low.

Wrap around moisture from the system as it pushes inland will result
in the continued rain chances (and low end thunderstorm chances) into
tomorrow over the Central Coast but the North Bay and Greater San
Francisco Bay Area are expected to be dry beyond late this evening.
Any thunderstorms that to develop will have the potential to produce
isolated, brief downpours. Temperatures both today and tomorrow will
be 5-15 degrees below seasonal averages.

&&

.LONG TERM...
(Thursday night through next Tuesday)
Issued at 131 PM PDT Wed Sep 18 2024

Friday afternoon will still be below normal across the region as the
upper level trough begins to push further inland. The warm-up
doesn`t begin until Saturday with near to slightly below normal
temperatures. Sunday and into early next week is when temperatures
are expected to be slightly above average as high pressure from the
eastern Pacific begins to build inland. The marine layer also looks
to return as a result with night and morning low clouds likely into
next week. Low clouds will the retreat to the coast by the afternoon
each day throughout the week.

&&

.AVIATION...
(00Z TAFS)
Issued at 508 PM PDT Wed Sep 18 2024

It`s VFR with high based clouds and widely scattered showers. Patchy
low clouds and fog /MVFR-LIFR/ developing tonight and Thursday morning,
improving to VFR by late Thursday morning.

Vicinity of SFO...VFR-MVFR. Onshore wind near 12 knots decreasing this
evening and becoming light northeast Thursday morning, then onshore
near 12 knots Thursday afternoon and early evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR-MVFR, a few passing showers are possible
tonight and Thursday. Onshore winds 8 to 15 knots, decreasing this
evening and becoming light and variable tonight and Thursday morning.
Onshore winds 10 to 15 knots Thursday afternoon and early evening.

&&

.MARINE...
(Tonight through next Monday)
Issued at 458 PM PDT Wed Sep 18 2024

Northwesterly breezes will be gentle to moderate, increasing to
become moderate to fresh over the outer waters by Thursday. Seas
will be moderate, building to become rough in the outer waters by
Thursday. There`s up to a 15% chance for thunderstorms through
tomorrow which could produce lightning, locally heavy rainfall,
locally  gusty winds, and small hail.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 PM Thursday to 3 PM PDT Friday for
     Pt Arena to Pt Reyes 10-60 NM.

&&

$$

SHORT TERM...RGass
LONG TERM....RGass
AVIATION...Canepa
MARINE...Sarment

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