Areal Flood Warning 3, NWS San Francisco Bay Area, CA

308 
WGUS46 KMTR 242032
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
132 PM PDT Sun Oct 24 2021

.This warning is an extension of the previous Flood Warning. 
Moderate to heavy rainfall will continue throughout the day causing 
steep rises in area streams.

CAC097-242300-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211024T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
132 PM PDT Sun Oct 24 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 400 PM PDT.

* At 132 PM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 4 and 7 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

MTR

749 
WGUS46 KMTR 242242
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
342 PM PDT Sun Oct 24 2021

.Moderate rainfall will continue into this evening which will 
maintain rises in area streams.

CAC097-250100-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
342 PM PDT Sun Oct 24 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 600 PM PDT.

* At 342 PM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 5 and 8 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

BB

698 
WGUS46 KMTR 250054
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
554 PM PDT Sun Oct 24 2021

.Moderate rainfall will continue into this evening which will 
maintain rises in area streams.

CAC097-250300-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
554 PM PDT Sun Oct 24 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 800 PM PDT.

* At 554 PM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

CW

050 
WGUS46 KMTR 250238
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
738 PM PDT Sun Oct 24 2021

.Moderate rainfall will continue into tonight which will maintain 
rises in area streams. Stream gauges continue to show rises to flood 
stages.

CAC097-250500-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
738 PM PDT Sun Oct 24 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 1000 PM PDT.

* At 738 PM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

MTR

954 
WGUS46 KMTR 250451
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
951 PM PDT Sun Oct 24 2021

.Even though rain is forecast to taper off shortly, streams and 
creeks will continue to remain near or above bankfull overnight into 
early Monday morning. Creeks currently in flood stage include Mark 
West Creek near Mirabel Heights, Green Valley Creek near Martinelli 
Road and Colgan Creek near Sebastopol.

CAC097-251000-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
951 PM PDT Sun Oct 24 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 300 AM PDT.

* At 951 PM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

RWW

650 
WGUS46 KMTR 250952
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
252 AM PDT Mon Oct 25 2021

.Light rain will continue to fall early this morning with many 
creeks and streams still at or near bankfull.

CAC097-251300-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
252 AM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 600 AM PDT.

* At 252 AM PDT, Doppler radar and automated rain gauges indicated 
  heavy rain. Flooding is already occurring in the warned area. 
  Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 0.5 to 1 inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

RWW

958 
WGUS46 KMTR 251249
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
549 AM PDT Mon Oct 25 2021

.Creeks and streams remain near bankfull across portions of Sonoma 
county. Water will slowly recede today.

CAC097-251600-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
549 AM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 900 AM PDT.

* At 549 AM PDT, Flooding is already occurring in the warned area. 
  Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts of 0.2 to 0.5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

RWW

688 
WGUS46 KMTR 251535
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
835 AM PDT Mon Oct 25 2021

.Although not much additional rainfall is expected, stream gages 
within the warning area remain in flood stage and will be slow to 
recede.

CAC097-252100-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211025T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
835 AM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 200 PM PDT.

* At 835 AM PDT, gauge reports indicated heavy rain. Flooding is 
  already occurring in the warned area. Between 6 and 9 inches of 
  rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts up to 0.1 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

MTR

406 
WGUS46 KMTR 252048
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
148 PM PDT Mon Oct 25 2021

.Stream gauges within the warning area remain in flood stage and 
will be slow to recede. Little to no additional rainfall expected.

CAC097-260100-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211026T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
148 PM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 600 PM PDT.

* At 148 PM PDT, stream gauges remain in flood stage and stream 
  waters have been slow to recede. Flooding is already occurring in 
  the warned area. Between 6 and 9 inches of rain have fallen.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

Additional rainfall amounts up to 0.1 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

ED

905 
WGUS46 KMTR 260039
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
539 PM PDT Mon Oct 25 2021

CAC097-260500-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211026T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
539 PM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 1000 PM PDT.

* At 539 PM PDT, stream gauges remain in flood stage and 
  stream/creek waters have been slow to recede. Flooding continues 
  in the warned area, primarily on the Mark West and Green Valley 
  creeks around the Forestville area.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

RGass

098 
WGUS46 KMTR 260431
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
931 PM PDT Mon Oct 25 2021

CAC097-261200-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211026T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
931 PM PDT Mon Oct 25 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 500 AM PDT Tuesday.

* At 931 PM PDT, stream gauges remain in flood stage and 
  stream/creek waters have been slow to recede. Flooding continues 
  in the warned area, primarily on the Mark West and Green Valley 
  creeks around the Forestville area.

* Some locations that will experience flooding include...
  Santa Rosa, Rohnert Park, Sebastopol, Cotati, South Santa Rosa 
  Cdp, Forestville and Graton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

Lorber

532 
WGUS46 KMTR 261151
FLWMTR

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service San Francisco CA
451 AM PDT Tue Oct 26 2021

CAC097-261800-
/O.EXT.KMTR.FA.W.0003.000000T0000Z-211026T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
451 AM PDT Tue Oct 26 2021

The National Weather Service in San Francisco has extended the

* Flood Warning for Urban area and small stream in...
  Central Sonoma County in northern California...

* Until 1100 AM PDT Tuesday.

* At 451 AM PDT, gauge reports indicated heavy rain. Flooding is 
  already occurring in the warned area.

* Some locations that will experience flooding include...
  Forestville and Graton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

MM

765 
WGUS86 KMTR 261758
FLSMTR

Flood Statement
National Weather Service San Francisco CA
1058 AM PDT Tue Oct 26 2021

CAC097-261808-
/O.EXP.KMTR.FA.W.0003.000000T0000Z-211026T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
1058 AM PDT Tue Oct 26 2021

...THE URBAN AREA AND SMALL STREAM FLOOD WARNING WILL EXPIRE AT 11 
AM PDT THIS MORNING FOR CENTRAL SONOMA COUNTY...

Although some creek levels remain high, the waters are receding and 
are forecast to go below minor flood levels soon. Flooding impacts 
should no longer pose a threat. Please continue to heed any 
remaining road closures.

LAT...LON 3847 12294 3850 12287 3849 12281 3839 12273
      3835 12271 3832 12276

$$

BB

Area Forecast Discussion
National Weather Service San Francisco Bay Area
1045 AM PDT Sun Oct 24 2021

.SYNOPSIS...Moderate to heavy rain in the North Bay today will
shift into the Bay Area by this afternoon. The heavy rain band
will shift over the Santa Cruz Mountains by early evening and the
Central coast tonight. In addition to heavy rain, strong southerly
winds will continue for much of today into this evening. Rain
turns to showers overnight into early Monday. Large northwest swells
arrive Monday with dangerous waves. A chance of North Bay light
rain Tuesday otherwise warming and drying trend.

&&

.DISCUSSION...as of 09:26 AM PDT Sunday... The forecast remains on
track with the heaviest rainfall still within the North Bay. Winds
are remaining strong with the gusts ahead of the system currently
stretching into the South Bay Counties and the Santa Cruz Mtns.
Peak gusts have been around 70 mph on higher peaks with 40 to 50
mph gusts filtering into lower areas. Expect the winds to linger
within the main rain band but cut back before the rain begins to
let off. Rainfall has been as forecasted so far, ranging from
1.50-4.00" within the valleys in the North Bay above 5" for for
higher peaks over the last 12 hours. Mt Tam continues to be the
rainfall leader with 7.50" in that time period. The rain band
will continue to move slowly to the south through the day and into
the night, for timing and forecasted totals, see the previous
discussion below.

&&

.PREV DISCUSSION...as of 3:42 AM PDT Sunday...No changes to ongoing
wind advisory, flash flood watch and high surf warning. Gave
careful consideration to timing of all products and they continue
to look valid given latest trends. In general forecast remains on
track and not seeing much deviation between observations and
incoming model data. If anything though, precip is over performing
with values already around 1.25 for downtown SF. Mt Tamalpais has
reported 0.79 inches alone in the last hour with 6 hour values
overnight of 3.34 inches. Thats of course one of the wettest spots
and ideally suited for the current upslope regime with the
moisture rich AR now taking aim right over the Bay Area.

So to keep it simple the heavy rain has already arrived in the
North Bay and will be monitoring burn areas closely. The main stem
rivers have lots of capacity but will show massive rises over the
next 24 hours. If the AR stalls for even a few hours over the
Russian basin will have to monitor trends closely. Of more concern
is some of the flashier creeks out of the Russian Basin such as
Mark West and those near the base of Mt Tamalpais such as San
Anselmo and Corte Madera. Of course any clogged storm drains and
culverts will lead to rapid nuisance flooding with rain of this
magnitude. Wind advisories already underway for the North Bay and
officially start at 5 am for the heart of the Bay Area.

Models suggest the main AR will drop to around the Golden Gate by
roughly 2-3 pm this afternoon. Expect several hours of very heavy
rain to hammer the urban corridors during this time frame
including the 101/280 on the Peninsula and 880/680 in the East
Bay. Stay off the roads if at all possible today. As the AR
boundary approaches the Santa Cruz mountains the focus will then
shift to monitoring the CZU burn scar late this afternoon and
evening. Ben Lomond is a good bellwether site to monitor for the
highest rain rates in the hills. Last hour they reported 0.29 with
1 inch storm total so far. If rates approach 0.50 in 30 minutes
debris flows will be of concern. The huge fire damaged redwoods
will be challenged by the strong 50 kt winds coming in at ridge
top level so any downed trees will quickly compromise roadways in
the Santa Cruz mountains. Things will go down hill in a hurry in
the Santa Cruz mountains one we reach the afternoon hours.

By late evening and before midnight the boundary will push into
the hills of coastal Monterey county. The back edge will be abrupt
with precip ending quickly to the north. By midnight things will
have quieted down for the Bay Area while the precip will linger
overnight through about 12-15z across southern Monterey county.

Much cooler with a few showers on Monday. The main threat will
turn to the ocean as massive northwest swell from 20-30 feet will
hammer the coastline. Please give our first responders a break and
stay well back from the ocean Monday and Tuesday. High Surf
Warnings have been posted.

A weak system will pass the our north with a chance of some light
rain for the North Bay on Tuesday but amounts on the order of a
a couple tenths for coastal Sonoma county.

Looks like warm high pressure to our south will build in behind
this departing low. A return to more seasonably dry weather.

&&

.AVIATION...as of 10:44 AM PDT Sunday...For the 18z TAFs.
Atmospheric river is in full swing across the North Bay with heavy
rain and MVFR/IFR vis/cigs. Observations show KSTS down to 1.5 SM
vis due to heavy rain with 2 SM all the way down to KSFO. MVFR-IFR
cigs are forecast to persist through mid to late Monday morning
due to rain, low cigs, and low vis. Observations currently have
ceiling heights between 800-2,500 ft for low clouds, 3,500-6,000
ft for mid level clouds, and 10,000 to 15,000 ft for high clouds.
Heavier showers are still expected to move south this afternoon
into the SF Bay/South Bay before reaching the Monterey Bay late
this afternoon/early this evening. Strong winds will also continue
both at the surface (30-40 kt gusts) and aloft where winds of
45-55 kt out of the SW are forecast through late tonight. LLWS
therefore will remain an issue along with gusty SE/SW surface
winds and wet runways. Both surface and winds aloft should
gradually diminish this evening and overnight. Winds are expected
to take a more westerly component tomorrow morning, though some
models have hinted at this happening this evening for certain
locations. Bottom line, poor conditions the rest of today and most
of tonight with heavy rain becoming showers tomorrow.

Vicinity of KSFO...MVFR/IFR conditions are expected to develop by
the afternoon due to low clouds and/or low vis due to heavy rain.
The strongest precipitation is still expected this afternoon into
this evening. Strong southerly surface winds continue with current
observations at the terminal gusting over 40 kt. The AWW remains
in effect until 05z tonight, though latest guidance shows winds
diminishing a little earlier than previously. Will monitor obs and
drop early if possible. Winds look to gradually turn more westerly
overnight, though the HRRR had been suggesting this may happen
earlier. Will monitor obs and adjust the taf as needed. Winds
aloft also remain strong with LLWS expected through late tonight.
Conditions to improve late tonight and tomorrow.

KSFO Bridge Approach...Similar to KSFO.

Monterey Bay...VFR/MVFR ahead of a storm system set to arrive
later this afternoon. Showers remain in the vicinity, but no heavy
rain has been observed thus far at the Monterey Bay terminals.
Cigs should gradually lower ahead of the heavier showers with MVFR
(possibly IFR/LIFR) conditions then persisting through at least
tomorrow morning. Gusty southerly winds also expected with gusts
25-35 kt. Stronger winds aloft are also expected at 40-50 kt thus
resulting in some LLWS through late tonight. Winds should diminish
overnight.

&&

.BEACHES...as of 4:29 AM PDT Sunday...A strong, early season
storm system arrives today and will result in significantly
increased wave energy from late today into early Tuesday. This
wave energy will transition through the coastal waters from late
today into Tuesday, and peak on Monday. Swell of 16 to 24 feet at
16 to 18 seconds is forecast to arrive with the swell train as it
peaks on Monday and result in a number of coastal hazards. These
hazards include large breaking waves of 20 to 30 feet (higher at
favored break points), increased risk of strong longshore and rip
currents, increased risk of coastal erosion and minor coastal
flooding, and enhanced coastal run up concerns due to the summer
beach profiles in place. Due to the early arrival of these large
waves, many beaches are still transitioning from their summer
beach profiles and lack the features and steepness to resist
larger wave run up on coasts. This means that more of this wave
energy will have a chance to move onto the beach and overtake
individuals, potentially injuring them, or pulling them into the
cold ocean. Each year, people die at the coast due to these or
similar ocean conditions. A high surf warning for the entire coast
has been issued for this threat and is in effect from 11PM Sunday
to 11AM Tuesday, with the highest risks once again at west to
northwest facing beaches.

&&

.MARINE...as of 10:05 AM PDT Sunday...A strong storm system
continues to impact the waters with heavy rain, strong winds, and
high seas. Gale force gusts are expected for the entire coastal
waters at some point today including all of the bays. Wind gusts
could strengthen to 40 to 50 kt. These strong winds will generate
very steep swell that result in hazardous conditions, especially
for smaller vessels. Additionally, this system will generate a
large west to northwest swell train with swell heights of 16 to 24
feet at 16 to 18 seconds. Swell heights to peak on Monday and
bring hazardous conditions to the surf zone and near harbor
entrances with breaking waves of 20 to 30 feet.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tday...Wind Advisory...CAZ516>518-528-530
             Flash Flood Watch...CAZ517
             Wind Advisory...CAZ006-508>513-529
             Flash Flood Watch...CAZ509-512
             Wind Advisory...CAZ505>507
             GLW...SF Bay
             GLW...Mry Bay
             GLW...Pt Reyes to Pigeon Pt 0-10 nm
             GLW...Pigeon Pt to Pt Pinos 0-10 nm
             GLW...Pt Pinos to Pt Piedras Blancas 0-10 nm
             GLW...Pigeon Pt to Pt Piedras Blancas 10-60 nm
             GLW...Pt Arena to Pt Reyes 0-10 nm until 3 PM
             GLW...Pt Arena to Pigeon Pt 10-60 nm until 3 PM

&&

PUBLIC FORECAST: RWW/Murdock
AVIATION: AS
MARINE: AS

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
734 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0622 AM     FLOOD            1 S NAPA                38.28N 122.30W
10/24/2021                   NAPA               CA   LAW ENFORCEMENT

            STREET FLOODING ON GOLDEN GATE DR NEAR STATE
            ROUTE 121.

&&

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
753 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0422 AM     NON-TSTM WND DMG 2 W MILL VALLEY         37.90N 122.57W
10/24/2021                   MARIN              CA   LAW ENFORCEMENT

            MULTIPLE POWER POLES DOWN ON ROADWAY.
            PANORAMIC HWY BETWEEN WASHINGTON PARK AND ST
            JUDE.

&&

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
846 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0838 AM     NON-TSTM WND DMG 4 SW COTATI             38.29N 122.75W
10/24/2021                   SONOMA             CA   LAW ENFORCEMENT

            1 FT DIAMETER TREE DOWN IN ROADWAY. MEACHAM
            RD JUST NORTH OF INTERSECTION WITH PEPPER
            RD.

&&

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
850 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 AM     FLOOD            3 N BRISBANE            37.73N 122.40W
10/24/2021                   SAN FRANCISCO      CA   LAW ENFORCEMENT

            STREET FLOODING. SAN BRUNO AVE ONRAMP TO
            US101 SOUTH.

&&

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
858 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     FLOOD            1 SE SAN FRANCISCO      37.77N 122.41W
10/24/2021                   SAN FRANCISCO      CA   PUBLIC

            STREET FLOODING. US 101 SOUTH NEAR HARRISON
            ST. RELATED VIA SOCIAL MEDIA.

&&

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
948 AM PDT SUN OCT 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0814 AM     NON-TSTM WND DMG 1 W MILLBRAE            37.60N 122.43W
10/24/2021                   SAN MATEO          CA   LAW ENFORCEMENT

            TREE DOWN ON ROADWAY. I-280 SOUTH/SR 35
            CONNECTOR.

&&

SPM