Special Weather Statement, NWS San Francisco Bay Area, CA

Area Forecast Discussion
National Weather Service San Francisco CA
1001 PM PDT Sat Apr 11 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 109 PM PDT Sat Apr 11 2026

 - Rain showers and isolated thunderstorms are forecast to
   increase this afternoon and evening

 - Rain showers and thunderstorm chances linger into Monday morning

 - A warming and drying trend returns through the remainder of
   the work week

&&

.SHORT TERM...
Issued at 109 PM PDT Sat Apr 11 2026
(This evening through Monday)

Rain showers and isolated thunderstorms remain in the forecast
through early afternoon. Then, as a surface low approaches the
northern California coast, a narrow cold-frontal rainband (NCFR) is
forecast to approach the North Bay between 2 PM - 5 PM, 4 PM - 7 PM
across the Bay Area, and 6 PM - 9 PM across the Central Coast. Along
and ahead of the NCFR is when we have the greatest potential for
damaging wind gusts exceeding 40 kt out over the ocean and bays.
This will also be when we have the greatest potential for rotating
cells that may produce waterspouts and/or weak tornadoes. Wind gusts
are also expected to reach up to or exceed 50 mph along the coast
and in the higher terrain during the aforementioned timeframes. Any
stronger convection will be capable of producing stronger wind
gusts. Again, much of our region remains under a Marginal Risk for
sever weather today.

The aforementioned low pressure system is forecast push into
northern California later tonight and become quasi-stationary
through Sunday. Thus, scattered to numerous rain showers and
isolated thunderstorms will prevail through Sunday and into early
Monday morning as a colder/unsettled air mass moves into the region.
This colder air mass will result in a low end potential for the
region's highest peaks to see snowfall through Monday morning.
However, little to no snow accumulations are forecast at this time.

&&

.LONG TERM...
Issued at 109 PM PDT Sat Apr 11 2026
(Monday night through next Friday)

The colder air mass will result in chilly temperatures across the
interior both Monday and Tuesday mornings especially over the North
Bay Valleys and interior Central Coast. Temperatures are currently
forecast to be in the low-to-upper 30s in these areas with low 40s
to near 50 degrees F elsewhere across the region. There is the
potential for frost each morning across these interior regions,
especially in the wind sheltered areas. Temperatures rebound to near
seasonal averages by Thursday and Friday as ridging builds in from
the eastern Pacific.

&&

.AVIATION...
(06Z TAFS)
Issued at 1001 PM PDT Sat Apr 11 2026

The main rain band has left the terminal regions, but with
convective showers expected through Sunday and perhaps into Monday,
overall confidence remains low to moderate, especially in regards to
wind speeds where convective showers may greatly impact local
conditions. Conditions are expected to be generally VFR-MVFR with
gentle to moderate winds from the southeast to the southwest through
the night, with southwest winds picking up through Sunday morning
and afternoon. Scattered showers and chances for thunderstorms
continue through Sunday, with a general decrease in coverage through
the day.

Vicinity of SFO... Low-end VFR to MVFR conditions with scattered
showers through the TAF period. Low confidence in the wind forecast,
where the best estimate has moderate southeast flow through the
overnight hours before the winds turn southwesterly Sunday
afternoon, with gusts to 20 kt. Winds then turn westerly and
diminish on Sunday night.

SFO Bridge Approach... Similar to SFO.

Monterey Bay Terminals... VFR-MVFR conditions with scattered showers
through the TAF period with broadly westerly winds overnight, with
some LLWS concerns at SNS early Sunday morning as surface winds
decouple from the flow aloft. Large scale southwest flow resumes
Sunday morning with gusts to 15-20 kt in the afternoon before winds
diminish Sunday night.

&&

.MARINE...
(Tonight through next Friday)
Issued at 1001 PM PDT Sat Apr 11 2026

The line of intense storms has moved onshore this evening, but
scattered showers and locally gusty winds continue through
Sunday. High pressure builds behind the system with fresh
northwest winds developing early next week, as seas abate to
become moderate through mid week.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 PM PDT Sunday for Mry Bay-Pt Reyes
     to Pigeon Pt 0-10 nm-SF Bay N of Bay Bridge.

     Small Craft Advisory until 9 AM PDT Sunday for Pigeon Pt to Pt
     Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt
     Piedras Blancas 0-10 nm.

&&

SHORT TERM...RGass
LONG TERM....RGass
AVIATION...DialH
MARINE...DialH

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Special Weather Statement
National Weather Service San Francisco CA
910 PM PDT Sat Apr 11 2026

CAZ502-504>506-120445-
Coastal North Bay Including Point Reyes National Seashore CA-
Marin Coastal Range CA-North Bay Interior Mountains CA-North Bay
Interior Valleys CA-
910 PM PDT Sat Apr 11 2026

...A SHOWER WILL IMPACT NORTHWESTERN MARIN...WEST CENTRAL NAPA AND
SOUTHEASTERN SONOMA COUNTIES UNTIL 945 PM PDT...

At 910 PM PDT, Doppler radar was tracking a shower 6 miles north of
Point Reyes Station, or 11 miles southwest of Petaluma, moving
northeast at 40 mph.

HAZARD...Wind gusts up to 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible. Hail may accumulate on roadways causing hazardous
         travel.

Locations impacted include...
  Santa Rosa, Petaluma, Rohnert Park, Cotati, South Santa Rosa Cdp,
  Roseland, Boyes Hot Springs, Tomales, Point Reyes Station, South
  Santa Rosa, Glen Ellen, Eldridge, El Verano, Fetters Hot
  Springs-Agua Caliente and Fetters Hot Spring.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3818 12296 3820 12295 3819 12293 3816 12292
      3816 12291 3815 12291 3814 12289 3815 12289
      3821 12293 3822 12292 3822 12293 3856 12266
      3838 12238 3805 12277 3811 12286
TIME...MOT...LOC 0410Z 215DEG 32KT 3818 12282

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

BKM

Special Weather Statement
National Weather Service San Francisco CA
1028 PM PDT Sat Apr 11 2026

CAZ006-120600-
San Francisco CA-
1028 PM PDT Sat Apr 11 2026

...A SHOWER WILL IMPACT SAN FRANCISCO COUNTY UNTIL 11 PM PDT...

At 1028 PM PDT, Doppler radar was tracking a shower over San
Francisco, moving northeast at 45 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  San Francisco.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3778 12251 3779 12249 3781 12248 3780 12246
      3780 12241 3781 12241 3779 12239 3775 12238
      3775 12239 3774 12238 3773 12238 3774 12237
      3772 12236 3772 12239 3771 12238 3771 12250
TIME...MOT...LOC 0528Z 222DEG 38KT 3775 12244

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

BKM

Special Weather Statement
National Weather Service San Francisco CA
1042 PM PDT Sat Apr 11 2026

CAZ508-509-512-120615-
Santa Cruz Mountains CA-San Francisco Peninsula Coast CA-San
Francisco Bay Shoreline CA-
1042 PM PDT Sat Apr 11 2026

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL SAN MATEO COUNTY UNTIL
1115 PM PDT...

At 1042 PM PDT, Doppler radar was tracking a strong thunderstorm near
Half Moon Bay, or 8 miles southwest of Belmont, moving northeast at
35 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  San Mateo, Redwood City, Foster City, San Carlos, Belmont, Half
  Moon Bay, Hillsborough, Atherton, Woodside, Highlands-Baywood Park,
  North Fair Oaks, Highlands and Emerald Lake Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3736 12240 3739 12242 3744 12244 3746 12245
      3759 12232 3753 12228 3757 12229 3756 12225
      3754 12225 3753 12227 3755 12222 3752 12225
      3751 12224 3750 12222 3748 12223 3752 12220
      3751 12219 3750 12220 3749 12215
TIME...MOT...LOC 0542Z 229DEG 28KT 3743 12241

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

BKM

Special Weather Statement
National Weather Service San Francisco CA
1101 PM PDT Sat Apr 11 2026

CAZ508-510-515-120630-
East Bay Hills CA-East Bay Interior Valleys CA-San Francisco Bay
Shoreline CA-
1101 PM PDT Sat Apr 11 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL CONTRA COSTA AND
NORTHWESTERN ALAMEDA COUNTIES UNTIL 1130 PM PDT...

At 1101 PM PDT, Doppler radar was tracking a strong thunderstorm near
Alameda, moving northeast at 20 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible. Hail may accumulate on roadways causing hazardous
         travel.

Locations impacted include...
  Oakland, Orinda, Moraga and Moraga Town.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3776 12222 3777 12222 3788 12216 3780 12205
      3772 12220 3773 12221 3776 12221
TIME...MOT...LOC 0601Z 223DEG 19KT 3773 12223

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

BKM

Special Weather Statement
National Weather Service San Francisco CA
1103 PM PDT Sat Apr 11 2026

CAZ508-509-512-120630-
Santa Cruz Mountains CA-San Francisco Peninsula Coast CA-San
Francisco Bay Shoreline CA-
1103 PM PDT Sat Apr 11 2026

...AN AREA OF STRONG THUNDERSTORMS WILL IMPACT CENTRAL SAN MATEO AND
NORTHWESTERN SANTA CLARA COUNTIES UNTIL 1130 PM PDT...

At 1103 PM PDT, Doppler radar was tracking an area of strong
thunderstorms near Woodside, or 8 miles south of San Carlos, moving
northeast at 35 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Hail may
         accumulate on roadways causing hazardous travel.

Locations impacted include...
  Redwood City, Mountain View, Palo Alto, Menlo Park, East Palo Alto,
  Los Altos Hills, Atherton, Woodside, Stanford, North Fair Oaks,
  Portola Valley, West Menlo Park and Emerald Lake Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3731 12240 3736 12241 3749 12222 3751 12220
      3750 12219 3752 12220 3752 12219 3748 12215
      3749 12214 3750 12216 3751 12213 3747 12212
      3746 12210 3748 12208 3745 12205 3726 12235
TIME...MOT...LOC 0603Z 222DEG 29KT 3739 12232

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

BKM

Special Weather Statement
National Weather Service San Francisco CA
1107 PM PDT Sat Apr 11 2026

CAZ502-505-506-120630-
Coastal North Bay Including Point Reyes National Seashore CA-
Marin Coastal Range CA-North Bay Interior Valleys CA-
1107 PM PDT Sat Apr 11 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN MARIN AND
SOUTHEASTERN SONOMA COUNTIES UNTIL 1130 PM PDT...

At 1107 PM PDT, Doppler radar was tracking a strong thunderstorm over
San Geronimo, or 9 miles west of San Rafael, moving northeast at 35
mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible. Hail may accumulate on roadways causing hazardous
         travel.

Locations impacted include...
  San Rafael, Novato, San Anselmo, Fairfax, Lucas Valley-Marinwood,
  San Geronimo, Black Point-Green Point, Woodacre and
  Lagunitas-Forest Knolls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3792 12267 3801 12277 3821 12255 3812 12244
      3812 12245 3811 12249 3806 12248 3806 12249
      3805 12249 3805 12250 3803 12250
TIME...MOT...LOC 0607Z 231DEG 28KT 3800 12269

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

BKM