Fulton, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

589
FXUS66 KMTR 230522
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
1022 PM PDT Thu May 22 2025

...New AVIATION...

.SYNOPSIS...
Issued at 252 PM PDT Thu May 22 2025

Elevated fire weather conditions continue through this evening due
to the combination of warm, dry, and windy conditions across the
region. Fire weather concerns ease by Friday morning with
pleasant, below normal temperatures and diurnally breezy winds to
continue into next week.

&&

.UPDATE...
Issued at 910 PM PDT Thu May 22 2025

Generally clear skies across most of the region, but for the first
time in a couple of nights, satellite imagery depicts the
formation of patchy stratus along the western slopes of the Marin
coastal ranges and the San Mateo hills, as well as a patch near
Bodega Bay. These are indicative of a rebuilding marine layer.
Combined with cooler temperatures and continuing onshore flow,
this will help alleviate fire weather concerns in the interior,
particularly as overnight humidity recoveries will improve through
the week. Unfortunately, there was a grass fire that did pop up
at the eastern edge of Alameda County today. Forward progress has
been stopped, but this is a reminder that the fire season is
quickly approaching. As for the forecast, no changes at this time.

DialH

&&

.SHORT TERM...
(This evening through Friday)
Issued at 252 PM PDT Thu May 22 2025

Strong onshore winds gusting between 30 to 35 mph along the coast,
mountain gaps and passes, and northwest/southeast oriented valleys
continue overnight into Friday morning. Elevated fire weather
concerns persists through this evening with dry conditions across
the interior (relative humidity values in the 15 to 30% range). The
primary concern continues to be for areas where grasses are cured
(grasses have browned/dried out). An approaching upper level trough
will help to bring in more moist air and deepen the marine layer to
1500 ft tonight. This increase in moisture will ease the elevated
fire concerns that we have seen over the last few days with
overnight relative humidity values increasing to 70-90% across the
interior.  Patchy stratus cover will return to coastal areas and the
San Francisco Bay region overnight but is not expected to be
widespread. Breezy winds will continue again on Friday, but, they
will be weaker than those observed on Wednesday/Thursday. Winds are
expected to gust between 20-25 mph on Friday along the coast,
through the valleys, and across the elevated terrain. Temperatures
across the North Bay hold steady in the upper 70s on Friday while
temperatures across the rest of the Bay Area will drop by about 5
degrees. This will bring most locations across the South Bay and
East Bay into the upper 60s to mid 70s and into the 50s to 60s along
the San Francisco Peninsula. Residents of the interior Central Coast
may feel a more substantial drop, with highs to drop from the upper
80s to low 90s on Thursday to the low to mid 80s on Friday. If you
find yourself thinking that this is a bit chilly for May, you would
be correct in that Friday`s forecast temperatures are expected to be
around 10 degrees below normal for this time of year.

&&

.LONG TERM...
(Friday night through next Wednesday)
Issued at 252 PM PDT Thu May 22 2025

Surface high pressure and a positively tilted upper level trough
will build in over the weekend into next week over the West Coast.
This will help to keep our temperatures and winds in a fairly stable
pattern this week. For temperatures, highs will stay in the 70s to
low 80s across the interior and upper 50s to mid 60s along the
coastline. Diurnally breezy winds between 20 to 30 mph will continue
across the coastline, valleys, and across the elevated terrain
through Wednesday. Overall this upcoming week looks pleasant with
temperatures running around 10 degrees below normal. That will
change by late next week with temperatures looking to rise again and
CPC forecasting above normal temperatures from the end of May into
June. In the longer run, both the GFS and ECMWF are starting to
generate a cut-off low oriented offshore to the southwest of the
California coastline. While this is still a ways out, it may be
worth keeping an eye on for the possibility of offshore winds across
the CWA.

&&

.AVIATION...
(06Z TAFS)
Issued at 1021 PM PDT Thu May 22 2025

Satellite imagery shows stratus developing along the Marin and San
Mateo coasts, as well as in the East Bay. Sites are still reporting
VFR conditions at this time, but will likely begin to falter and as
the marine layer grows. MVFR to IFR cigs are expected around KHAF,
KSFO, and OAK. Compared to the previous update, confidence has
increased some for the North, South, and East Bay terminals in
reduced cigs. Started to hint at the possibility of MVFR cigs at
these sites, likely after 9Z, with highest confidence around KLVK
due to the current satellite imagery. Stratus is generally expected
to be short lived at most sites and erode by mid to late morning.
KLVK and KSJC remain VFR. Breezy winds increase once again for the
afternoon, with stratus likely having more of an impact tomorrow
night.


Vicinity of SFO...KSFO remains fairly gusty tonight with models
struggling with some of the stronger winds. Expect the stronger
gusts to slacken after 7-8Z though winds should remain elevated.
MVFR to possibly IFR cigs are expected to come in somewhere around
this time frame and then dissipate by late morning. Gusty
westerly winds return tomorrow afternoon with gusts up to 25kt
possible by mid to late afternoon. Stratus looks to return
tomorrow night, bringing another round of reduced cigs.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR conditions are being observed and
stratus has yet to make an appearance. Expect this to form later
tonight, bringing MVFR to potentially IFR cigs. Low cloud looks to
lift around KSNS by mid to late morning, with cigs potentially only
becoming SCT to FEW for KMRY. Stratus looks to come back by the
early evening, leading to another night of low cloud.

&&

.MARINE...
(Tonight through next Wednesday)
Issued at 910 PM PDT Thu May 22 2025

Hazardous marine conditions continue across the waters as strong
northwesterly breezes with near gale to gale force gusts and rough
seas persist. Fresh to strong northwesterly breezes and moderate
to rough seas will prevail through Monday.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Friday for SF Bay N of Bay
     Bridge.

     Small Craft Advisory from 3 PM to 9 PM PDT Friday for SF Bay N
     of Bay Bridge.

     Gale Warning until 3 AM PDT Friday for Mry Bay-Pigeon Pt to Pt
     Pinos 0-10 nm.

     Small Craft Advisory until 9 AM PDT Friday for Pt Arena to Pt
     Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

     Gale Warning from 9 AM Friday to 3 AM PDT Saturday for Pt Arena
     to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

     Small Craft Advisory until 3 PM PDT Friday for Pt Reyes to
     Pigeon Pt 0-10 nm.

     Gale Warning from 3 PM Friday to 3 AM PDT Saturday for Pt Reyes
     to Pigeon Pt 0-10 nm.

     Gale Warning until 3 AM PDT Saturday for Pt Pinos to Pt Piedras
     Blancas 0-10 nm.

     Small Craft Advisory until 3 AM PDT Saturday for Pigeon Pt to Pt
     Pinos 10-60 NM.

&&

$$

SHORT TERM...Kennedy
LONG TERM....Kennedy
AVIATION...KR
MARINE...KR

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