Spreckels, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

212
FXUS66 KMTR 090353
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
853 PM PDT Sun Jun 8 2025

...New UPDATE...

.SYNOPSIS...
Issued at 153 PM PDT Sun Jun 8 2025

Fairly quiet conditions this week, with the marine layer making
additional appearances for at least another night or two.
Temperatures will generally be near their seasonal averages this
week, though interior temperatures might rise a few degrees each day

&&

.UPDATE...
Issued at 852 PM PDT Sun Jun 8 2025

No changes in the forecast this evening as quiet ambient weather
conditions will continue to persist through the extended forecast.
An active marine layer is producing low marine stratus clouds along
our coastal communities, with patchy fog and drizzle possible
through the overnight and into the Monday morning commute.

&&

.SHORT TERM...
(This evening through Monday)
Issued at 153 PM PDT Sun Jun 8 2025

An upper level trough just to our west will produce a small upper
level cutoff low which is expected to slide into Central CA late
tonight and into early tomorrow morning. Expect onshore flow to
usher in the marine layer again tonight, leading to cloudy skies and
cooler temperatures. IF the marine layer is able to make it about
1500 ft again or so, expect a similar clearing pattern for tomorrow
and similar high temperatures as to what we see today.

&&

.LONG TERM...
(Monday night through next Saturday)
Issued at 153 PM PDT Sun Jun 8 2025

Upper level ridging holds through Tuesday, with the ridging being
pushed into the Desert Southwest early Wednesday. This is due to a
quick moving upper level shortwave diving across the PacNW and
Northern CA with it quickly moving east throughout the day. This
will leave us with quasi-zonal to weak upper level troughing for a
brief period on Thursday, before upper level troughing takes hold of
the forecast for Friday and the weekend. High temperatures remain a
touch warmer on Tuesday before falling and then generally holding
near the seasonal averages for the rest of the forecast period.

&&

.AVIATION...
(00Z TAFS)
Issued at 534 PM PDT Sun Jun 8 2025

Coastal stratus /MVFR-IFR/ will move inland tonight and Monday
morning on onshore winds. The SFO-SAC pressure gradient is 3.5
mb and the marine layer depth is 1100 feet per Sunday afternoon
Oakland upper air sounding. A few patches of coastal drizzle are
likely tonight and Monday morning. Stratus lifting to MVFR-VFR
while it`ll be VFR inland Monday. HREF output shows stratus
returning Monday night and Tuesday morning.

Vicinity of SFO...Near moderate confidence VFR continues through
mid evening at SFO. Currently, the strongest onshore winds are
focused through the Golden Gate and north of the Bay Bridge e.g.
Point Blunt Angel Island reports gusts to 30 knots. This can help
steady or possibly reduce onshore wind strength (ability for winds
to transport stratus) at SFO including if the westerly surface
wind holds onto a northerly wind component to assist downslope
drying. Plus the marine layer depth vicinity KOAK has compressed  to
1100 feet relative to the morning 12z upper air sounding. HREF and
RAP (pessimistic, going IFR-LIFR ceiling) output shows increasing
stratus /IFR/ tonight and Monday morning. BKN ceiling forecast 05z
this evening, IFR ceiling prevailing to 18z Monday. Stratus /IFR/
returns Monday evening and night. West northwest wind gusting to 25
to possibly 30 knots this evening, wind decreasing to near 10 knots
tonight and Monday morning. West to northwest wind increasing to 20
to 28 knots Monday afternoon and early evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Stratus /MVFR-IFR/ and a few patches of
light drizzle are possible tonight and Monday morning. Stratus
lifting to MVFR-VFR by late Monday morning and early afternoon.
Onshore winds 5 to 15 knots tonight and Monday.

&&

.MARINE...
(Tonight through next Friday)
Issued at 452 PM PDT Sun Jun 8 2025

Fresh westerly breezes will develop across the bays this afternoon
and evening. A more widespread fresh NW breeze will arrive Monday
afternoon across the coastal waters. A low amplitude, long period
southwesterly swell arrives Monday, bringing enhanced currents
and causing waves to break in deeper water. Strong NW winds and
rough seas are expected to arrive by mid-week.

&&

.BEACHES...
Issued at 117 PM PDT Sun Jun 8 2025

A long period southerly swell will enter the waters Monday into
Tuesday bringing a higher risk for rip current along beaches.
Breaking waves about 5 to 7 feet, but strong currents and sneaker
waves will be the bigger hazard. Use caution near the water and
never turn your back on the ocean.

&&

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

     Small Craft Advisory from 3 PM to 9 PM PDT Monday for Pigeon Pt
     to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Pinos
     to Pt Piedras Blancas 0-10 nm-SF Bay N of Bay Bridge.

     Small Craft Advisory until 3 AM PDT Monday for Pt Pinos to Pt
     Piedras Blancas 0-10 nm.

     Small Craft Advisory until 9 PM PDT Monday for Pt Arena to Pt
     Reyes 10-60 NM.

&&

$$

SHORT TERM...KR
LONG TERM....KR
AVIATION...Canepa
MARINE...Canepa

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, X, and YouTube at:
www.facebook.com/nwsbayarea
x.com/nwsbayarea
www.youtube.com/nwsbayarea