Alert archive / California / River Flood Warnings in 2017

River Flood Warning 15, NWS San Francisco Bay Area, CA

February 20, 2017Monterey County, California

NWS San Francisco Bay Area, CA issued this river flood warning at Feb 20, 2017, 5:03 AM PST for Monterey County, California. It took effect at Feb 20, 2017, 7:15 PM PST. It was in force for 15 hr.

The area

The outline as issued.

The facts

Issued
Feb 20, 2017, 5:03 AM PST (13:03 UTC)
In effect from
Feb 20, 2017, 7:15 PM PST
Expired
Feb 21, 2017, 10:31 AM PST
In force
15 hr
Issued by
NWS San Francisco Bay Area, CA
Area
Storm-based polygon
Flood severity
Minor

County Monterey County, CA

The radar

The San Francisco radar (KMUX), 75 km from the middle of the area, began a volume at 13:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Carmel River at Robles Del Rio (RDRC1).

Action stage
7.5 ft
Minor stage
8.5 ft
Moderate stage
11 ft
Major stage
13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 11143200, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

353 
WGUS46 KMTR 201304
FLWMTR
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
503 AM PST MON FEB 20 2017

...The National Weather Service in the SF/Monterey Bay Area has 
issued a flood warning for the following rivers in California... 

  Carmel River at Robles Del Rio

.Widespread moderate to heavy rainfall continues to spread across the region
this morning and is focused heavily on Monterey County and the Carmel River basin.
Heavy rain is likely to persist through Monday afternoon and potentially
into early Monday evening, and is expected to cause flooding on the Carmel River.

CAC053-211303-
/O.NEW.KMTR.FL.W.0015.170221T0600Z-000000T0000Z/
/RDRC1.1.ER.170221T0600Z.170221T0700Z.000000T0000Z.NO/
503 AM PST MON FEB 20 2017

The National Weather Service in the San Francisco Bay Area 
Has issued a
* Flood Warning for 
  The Carmel River at Robles Del Rio
* From this evening until further notice
* At 04AM Monday the stage was...4.7 feet
* Minor flooding is forecast
* Flood stage is 8.5 feet
* Forecast to rise above flood stage by late this evening and 
  continue to rise to near 9.8 feet by near this midnight. Additional
  rises are possible thereafter.
* At 11.0 feet...Hacienda Carmel residential development levee is 
  threatened.  Moderate flooding of golf courses and low lying homes 
  along the entire Carmel River.  Homes in the Carmel Lagoon area 
  begin to experience moderate flooding.
* At 10.0 feet...South side of Highway 1 bridge access becomes 
  inundated and impassable.  Many low lying homes threatened along 
  the entire Carmel River.  Low lying homes near Camp Steffani 
  experience substantial flooding and homes near Schulte Road in 
  danger of flooding.  Homes surrounding the Carmel Lagoon area are 
  in danger of flooding.
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.

&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Those living, working, or recreating along or near the river should 
prepare for flood conditions and be ready to move to higher ground. 
Follow emergency official instructions.

Flooding can cause additional hazards like bank collapse and channel 
erosion. Avoid areas adjacent to a flooding river. Do not let 
children play near floodwaters...especially around culverts and storm
drains.

Do not drive through flood prone areas...low water crossings...or go 
around barricades. The road ahead may be undermined or washed out and
the water depth too great to allow your car to cross safely.

For the latest developments listen to NOAA Weather Radio or tune to 
your local tv or radio station. Information can also be obtained from
the NWS website at www.wrh.noaa.gov/mtr

The next statement will be issued by 9am local time or 
sooner as conditions warrant.

&&
5 follow-up statements
586 
WGUS86 KMTR 201739
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
939 AM PST MON FEB 20 2017

...The flood warning continues for the following rivers in 
California...
 
  Carmel River at Robles Del Rio 
  Coyote Creek near Edenvale 

.Widespread moderate to heavy rainfall continues to spread across the region
this morning and is focused heavily on the greater Bay Area. Heavy rain is likely 
to persist through Monday afternoon and potentially into Monday evening,  and is 
expected to cause flooding on the Carmel River in Monterey County and Coyote Creek 
in Santa Clara County.

CAC053-211739-
/O.EXT.KMTR.FL.W.0015.170221T0400Z-000000T0000Z/
/RDRC1.1.ER.170221T0400Z.170221T0800Z.000000T0000Z.NO/
939 AM PST MON FEB 20 2017

...Flood Warning extended until further notice...The Flood Warning 
continues for
  The Carmel River at Robles Del Rio
* From late this evening until further notice
* At 09AM Monday the stage was 6.7 feet
* Minor flooding is forecast
* Flood stage is 8.5 feet
* Forecast to rise above flood stage by late this evening and 
  continue to rise to near 10.4 feet by .
* At 11.0 feet...Hacienda Carmel residential development levee is 
  threatened.  Moderate flooding of golf courses and low lying homes 
  along the entire Carmel River.  Homes in the Carmel Lagoon area 
  begin to experience moderate flooding.
* At 10.0 feet...South side of Highway 1 bridge access becomes 
  inundated and impassable.  Many low lying homes threatened along 
  the entire Carmel River.  Low lying homes near Camp Steffani 
  experience substantial flooding and homes near Schulte Road in 
  danger of flooding.  Homes surrounding the Carmel Lagoon area are 
  in danger of flooding.
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.


&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

CAC085-211739-
/O.EXT.KMTR.FL.W.0014.170221T0240Z-000000T0000Z/
/CYEC1.1.ER.170221T0240Z.170221T1100Z.000000T0000Z.NR/
939 AM PST MON FEB 20 2017

...Flood Warning extended until further notice...The Flood Warning 
continues for
  The Coyote Creek near Edenvale
* From this evening until further notice
* At 08AM Monday the stage was 8.7 feet
* Minor flooding is forecast
* Flood stage is 10.0 feet
* Forecast to rise above flood stage by this evening and continue to 
  rise to near 11.9 feet by early tomorrow morning. Additional rises 
  are forecast for Tuesday when levels should reach 12.7 feet in the early
  afternoon.
* At 12.0 feet...Moderate flooding possible along portions of Coyote 
  Creek south of I-880.
* At 10.0 feet...Minor localized flooding likely.

&&

LAT...LON 3745 12193 3739 12184 3723 12171 3722 12176
      3729 12186 3744 12196       

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

All those affected by river conditions should remain alert for rapid 
changes and for possible forecast revisions.



The next statement will be issued by 3pm local time or 
sooner as conditions warrant.

&&
177 
WGUS86 KMTR 210001
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
401 PM PST MON FEB 20 2017

...The flood warning continues for the following rivers in 
California...
 
  Carmel River at Robles Del Rio 
  Coyote Creek near Edenvale 

.Widespread moderate to heavy rain late Sunday Night and Monday is 
producing signifcant runoff into the Coyote Creek basin in Santa
Clara County and the Carmel River basin in Monterey County. 
Rainfall had tapered off across both basins by mid afternoon Monday,
but renewed moderate to heavy rain is likely through early Monday
evening. Given rainfall that has already fallen on these basins, and 
additional forecast rainfall, both the Carmel River and Coyote
Creek are expected to flood starting Monday evening. 

CAC053-220000-
/O.EXT.KMTR.FL.W.0015.170221T0315Z-170222T0000Z/
/RDRC1.1.ER.170221T0315Z.170221T0800Z.170221T1200Z.NO/
401 PM PST MON FEB 20 2017

...The Flood Warning continues for
  The Carmel River at Robles Del Rio
* From Monday evening until Tuesday afternoon
* At 03PM Monday the stage was 8.1 feet
* Minor flooding is forecast
* Flood stage is 8.5 feet
* Forecast to rise above flood stage by 8 pm Monday evening and continue to 
  rise to near 10.5 feet by midnight Monday night. The river is forecast to
  fall below flood stage stage by sunrise Tuesday morning.
* At 11.0 feet...Hacienda Carmel residential development levee is 
  threatened.  Moderate flooding of golf courses and low lying homes 
  along the entire Carmel River.  Homes in the Carmel Lagoon area 
  begin to experience moderate flooding.
* At 10.0 feet...South side of Highway 1 bridge access becomes 
  inundated and impassable.  Many low lying homes threatened along 
  the entire Carmel River.  Low lying homes near Camp Steffani 
  experience substantial flooding and homes near Schulte Road in 
  danger of flooding.  Homes surrounding the Carmel Lagoon area are 
  in danger of flooding.
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.


&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

CAC085-220001-
/O.EXT.KMTR.FL.W.0014.170221T0500Z-000000T0000Z/
/CYEC1.1.ER.170221T0500Z.170221T1700Z.000000T0000Z.NR/
401 PM PST MON FEB 20 2017

...Flood Warning continues for
  The Coyote Creek near Edenvale
* From late Monday evening until further notice
* At 02PM Monday the stage was 9.2 feet
* Minor flooding is forecast
* Flood stage is 10.0 feet
* Forecast to rise above flood stage by 9 PM Monday evening and 
  continue to rise to near 11.6 feet by early Tuesday afternoon. 
  Additional rises are possible thereafter.
* At 12.0 feet...Moderate flooding possible along portions of Coyote 
  Creek south of I-880.
* At 10.0 feet...Minor localized flooding likely.

&&

LAT...LON 3745 12193 3739 12184 3723 12171 3722 12176
      3729 12186 3744 12196       

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

All those affected by river conditions should remain alert for rapid 
changes and for possible forecast revisions.

The next statement will be issued by 9 PM PST Monday or 
sooner as conditions warrant.

&&
796 
WGUS86 KMTR 210453
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
853 PM PST MON FEB 20 2017

...The flood warning continues for the following rivers in 
California...
 
  Carmel River at Robles Del Rio 
  Coyote Creek near Edenvale 
  Salinas River near Spreckels 

.[insert the hydrological or meteorological reasoning here!!!]

CAC053-220120-
/O.EXT.KMTR.FL.W.0015.000000T0000Z-170222T0120Z/
/RDRC1.1.ER.170221T0504Z.170221T0800Z.170221T1320Z.NO/
853 PM PST MON FEB 20 2017

...The Flood Warning continues for
  The Carmel River at Robles Del Rio
* From late Monday evening until Tuesday afternoon
* At 08PM Monday the stage was 7.9 feet
* Minor flooding is forecast
* Flood stage is 8.5 feet
* Forecast to rise above flood stage by late Monday evening and 
  continue to rise to near 10.8 feet by around midnight Monday 
  Night.The river will then fall below flood stage by Tuesday morning.
* At 11.0 feet...Hacienda Carmel residential development levee is 
  threatened.  Moderate flooding of golf courses and low lying homes 
  along the entire Carmel River.  Homes in the Carmel Lagoon area 
  begin to experience moderate flooding.
* At 10.0 feet...South side of Highway 1 bridge access becomes 
  inundated and impassable.  Many low lying homes threatened along 
  the entire Carmel River.  Low lying homes near Camp Steffani 
  experience substantial flooding and homes near Schulte Road in 
  danger of flooding.  Homes surrounding the Carmel Lagoon area are 
  in danger of flooding.
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.


&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

CAC085-220453-
/O.EXT.KMTR.FL.W.0014.170221T0436Z-000000T0000Z/
/CYEC1.1.ER.170221T0423Z.170221T0700Z.000000T0000Z.NR/
853 PM PST MON FEB 20 2017

...The Flood Warning continues for
  The Coyote Creek near Edenvale
* From late Monday evening until further notice
* At 08PM Monday the stage was 9.7 feet
* Minor flooding is forecast
* Flood stage is 10.0 feet
* Forecast to rise above flood stage by late Monday evening and 
  continue to rise to near 11.3 feet around midnight Monday night.
* At 12.0 feet...Moderate flooding possible along portions of Coyote 
  Creek south of I-880.
* At 10.0 feet...Minor localized flooding likely.

&&

LAT...LON 3745 12193 3739 12184 3723 12171 3722 12176
      3729 12186 3744 12196       

$$

CAC053-220453-
/O.EXT.KMTR.FL.W.0016.170222T0200Z-000000T0000Z/
/SPRC1.1.ER.170222T0200Z.170222T0400Z.000000T0000Z.NO/
853 PM PST MON FEB 20 2017

...Flood Warning continues for
  The Salinas River near Spreckels
* From Tuesday evening until further notice
* At 08PM Monday the stage was 16.6 feet
* Minor flooding is forecast
* Flood stage is 23.0 feet
* Forecast to rise above flood stage by Tuesday evening and continue
  to rise to near 24.7 feet by around midnight Tuesday night.
* At 24.0 feet...The lowest areas of agricultural land along the 
  lower portions of the Salinas River will have significant flooding.
  River Road will have moderate flooding. Spreckels Boulevard will 
  begin to flood.
* At 23.0 feet...A few homes near the Salinas River along the reach 
  of the river gage will begin to flood. River Road near spreckels 
  will have minor flooding.
* At 19.0 feet...Lowland agricultural areas will have minor flooding.


&&

LAT...LON 3662 12185 3679 12179 3675 12161 3645 12123
     3636 12136                   

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

All those affected by river conditions should remain alert for rapid 
changes and for possible forecast revisions.

The next statement will be issued by 3 AM PST Tuesday or 
sooner as conditions warrant.

&&
096 
WGUS86 KMTR 211130
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
330 AM PST TUE FEB 21 2017

...The flood warning is cancelled for the following rivers in 
California...
  Salinas River near Spreckels

...The flood warning continues for the following rivers in 
California... 
  Carmel River at Robles Del Rio 

.Widespread precipitation has ended across the region and river
levels continue to recede, especially along the Carmel River where
ongoing flooding is expected to ease through late Tuesday morning.
Additional rises on the Salinas River may be possible through
midweek, yet the river is no longer forecast to exceed flood stage.

CAC053-220230-
/O.EXT.KMTR.FL.W.0015.000000T0000Z-170222T0230Z/
/RDRC1.1.ER.170221T0541Z.170221T0900Z.170221T1430Z.NO/
330 AM PST TUE FEB 21 2017

...Flood Warning extended until this evening...The Flood Warning 
continues for
  The Carmel River at Robles Del Rio
* Until this evening
* At 02 AM Tuesday the stage was 9.4 feet
* Minor flooding is occurring and Minor flooding is forecast
* Flood stage is 8.5 feet
* The river will continue to fall to below flood stage by later this 
  morning.
* At 10.0 feet...South side of Highway 1 bridge access becomes 
  inundated and impassable.  Many low lying homes threatened along 
  the entire Carmel River.  Low lying homes near Camp Steffani 
  experience substantial flooding and homes near Schulte Road in 
  danger of flooding.  Homes surrounding the Carmel Lagoon area are 
  in danger of flooding.
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.

&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

CAC053-211200-
/O.CAN.KMTR.FL.W.0016.000000T0000Z-170221T1130Z/
/SPRC1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
330 AM PST TUE FEB 21 2017

The Flood Warning is cancelled for
  The Salinas River near Spreckels
* At 03 AM Tuesday the stage was 16.1 feet
* Additional rises on the river are possible and levels may reach
  monitor stage of 20.0 feet by midweek. However, the river is no
  longer forecast to reach flood stage.
* Flood stage is 23.0 feet
* At 19.0 feet...Lowland agricultural areas will have minor flooding.

&&

LAT...LON 3662 12185 3679 12179 3675 12161 3645 12123
     3636 12136                   

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

All those affected by river conditions should remain alert for rapid 
changes and for possible forecast revisions.

The next statement will be issued by 9 AM PST Tuesday or sooner as
conditions warrant.

&&
099 
WGUS86 KMTR 211831
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
1031 AM PST TUE FEB 21 2017

...The flood warning is cancelled for the following rivers in 
California...
  Carmel River at Robles Del Rio
  
  
...The flood warning continues for the following rivers in 
California..
  Coyote Creek near Edenvale 

.Lingering showers and possibility of thunderstorms remains today, but the heavy rain has largely ended across the greater Bay Area.  The flood wave on the Carmel River has worked its way down through the watershed and gages from Carmel Valley west to the ocean indicate falling water levels.  Except for isolated ponding from flood flows overnight, flood levels are no longer being exceeded on the Carmel River.

In the South Bay, releases from Anderson Reservoir remain elevated and the Madrone stream gage immediately downstream is showing cresting in its hydrograph.  Passage of the flood waves is expected to occur throughout the day today, with levels dropping back down below flood stage at the Edenvale location sometime in the overnight hours.

CAC053-211901-
/O.CAN.KMTR.FL.W.0015.000000T0000Z-170222T0230Z/
/RDRC1.1.ER.170221T0541Z.170221T0900Z.170221T1239Z.NO/
1031 AM PST TUE FEB 21 2017

The Flood Warning is cancelled for
  The Carmel River at Robles Del Rio
* Until this evening
* At 09AM Tuesday the stage was 7.7 feet
* Flood stage is 8.5 feet
* At 8.5 feet...Low lying homes from Camp Steffani to below Robles 
  del Rio will begin to flood. Old Odello Ranch near Carmel begins to
  flood.  Homes along Paso Hondo and Dampierre Park subject to 
  flooding.

&&

LAT...LON 3656 12193 3652 12176 3640 12154 3637 12167
      3649 12179 3652 12193       

$$

CAC085-221831-
/O.CON.KMTR.FL.W.0014.000000T0000Z-000000T0000Z/
/CYEC1.3.ER.170221T0728Z.170221T1726Z.000000T0000Z.NR/
1031 AM PST TUE FEB 21 2017

The Flood Warning continues for
  The Coyote Creek near Edenvale
* Until further notice
* At 09AM Tuesday the stage was 12.9 feet
* Record flooding is occurring and Record flooding is forecast
* Flood stage is 10.0 feet
* The river will continue to fall today and tonight.
* At 12.0 feet...Moderate flooding possible along portions of Coyote 
  Creek south of I-880.
* At 10.0 feet...Minor localized flooding likely.

&&

LAT...LON 3745 12193 3739 12184 3723 12171 3722 12176
      3729 12186 3744 12196       

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

All those affected by river conditions should remain alert for rapid 
changes and for possible forecast revisions.








The next statement will be issued by 3pm local time or 
sooner as conditions warrant.

&&

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this river flood warning went out at Feb 20, 3:34 AM PST, 1 hour 29 minutes earlier.

Area forecast discussion, Feb 20, 3:34 AM PST, 1 hour 29 minutes before
Area Forecast Discussion
National Weather Service San Francisco Bay Area
334 AM PST Mon Feb 20 2017

.SYNOPSIS...High impact event unfolding across the region this
Monday morning and will likely persist through the afternoon hours
as an atmospheric river takes aim at the central California coast.
Periods of heavy rainfall are expected, especially along the coastal
ranges, along with strong and gusty southerly winds through this
evening. These conditions will likely result in widespread flooding,
downed trees and power lines resulting in isolated to widespread
power outages. Flooding of area creeks, streams and low lying,
poorly drained areas can also be expected as well as rises on main-
stem rivers. The threat for rock/mud slides, shallow landslides and
debris flows in recent burn scar areas will also increase during the
next 12 to 24 hours. Rainfall and winds will taper off late tonight
into Tuesday. Cool and somewhat drier weather conditions are
expected during the second half of the work week.

&&

.DISCUSSION...as of 02:34 AM PST Monday...While the arrival of a
much anticipated atmospheric (AR) river was delayed slightly,
widespread rainfall now spreading across the entire region this
morning with satellite derived PWAT values of 1.5" approaching the
Central Coast. Thus, over the past few hours moderate to locally
heavy rainfall has spread inland across the region with even a few
lightning strikes offshore and across the North Bay. At times,
rainfall rates have reached between 0.33" to 0.50"/hr with this
trend likely to continue through 4 AM PST. The latest forecast
models continue to indicate a band of heavy rainfall will develop
and become more narrow in focus somewhere between San Francisco
and the Big Sur coast. At this point, rainfall rates in excess of
0.50"/hr and potentially as much as 1.00"/hr will be possible,
especially along the southwest facing slopes, which will greatly
increased the threat for flooding and flash flooding where/when
this boundary stalls. Current thinking is that the San Mateo and
Santa Cruz coast and points inland may be hardest hit through the
morning hours. However, given the rapidly developing nature of
this system, a jog north or south remains possible and thus
current trends will need to be closely monitored through the
morning. For additional information, feel free to read the latest
Mesoscale Precipitation Discussion from the WPC:
http://origin.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=00
60&yr=2017

Southerly winds out ahead of this system have also increased early
this morning with gusts in excess of 45 MPH over the Pacific and in
the highest peaks across the region. Expecting these winds to
further intensify through the afternoon and evening as surface low
pressure deepens offshore and races toward northern California/
southwest Oregon. Wind gusts of 60 MPH or greater will be possible
this afternoon and evening, mainly in elevations above 1000 feet and
along the coastal ranges. Downed trees and power lines will likely
result in isolated to widespread power outages through the day.
Thus, a High Wind Warning and Wind Advisory remain in effect through
late tonight.

A Flood Watch also remains in effect for the entire region through
tonight given the intense rainfall forecast over already saturated
soils. The combination of heavy rainfall and strong winds will also
result in an increased threat for rock/mud slides, shallow
landslides and debris flows in recent burn scar areas through this
afternoon. Through early Tuesday morning, storm total rainfall
amounts of 1.50-2.00" will be possible for inland San Benito and
Monterey County with amounts less than 1.00" possible in the rain
shadowed valley locations. Santa Clara Valley, also rain shadowed
can expect between 1.25-3.00" (higher amounts closer to the
foothills and lesser possible in downtown San Jose). Inland East
Bay, San Francisco Bay Shoreline, and North Bay Valley areas can
expect 2.25-3.50", locally higher if the heavy band of precipitation
makes a shift to the north. Big Sur and East Bay peaks and ranges,
4.00-7.00", Coastal North Bay 3.00-5.00", Coastal Santa Cruz and San
Mateo ridges, 5.00-10.00", again locally higher depending on
if/when/where the band of heaviest precipitation stalls.

The AR and frontal boundary will then shift southward this afternoon
as the aforementioned surface low off of the coast shifts inland
well to our north and the main mid/upper level low deepens off of
the Pacific Northwest coast.  In wake of the frontal passage, light
to occasionally moderate precipitation will persist along the
southwest facing slopes while diminishing over inland valley
locations. With the arrive of mid/upper level support and a colder
air mass aloft, isolated thunderstorms will also be possible from
late tonight into Tuesday morning. While organized, heavy rainfall
will tapper off on Tuesday during the day, lingering showers will
remain possible into Wednesday morning as the trough axis shifts
inland across the region.

Cooler and drier conditions are forecast from Wednesday into early
Friday as a weak ridge builds in behind the exiting trough. Late in
the week and into the upcoming weekend, forecast models continue to
differ yet show the potential for cool, unsettled weather
conditions. However, widespread, heavy rainfall is not currently
anticipated with this colder system given the lack of a deep
moisture tap. Stay tuned for the latest!

&&

.AVIATION...As of 3:34 AM PST Sunday...Strong southerly winds
spreading from the coastal waters to over land early this morning
with the passage of a strong warm front from the eastern Pacific.
Area metars indicating mostly de-coupled surface winds while winds
aloft are southerly at 30-40 knots. Once the warm front clears the
area this morning a newly re-generating front will set up WSW-ENE
across the Bay Area this morning eventually coupling with a slowly
approaching cold front from the west causing winds to steepen
through the day. WRF model forecasts up to 60 knots SW wind at the
925 mb level (approx 2500 feet) this afternoon and evening over
the Bay Area. Thus, potential for long duration low level wind
shear at least this morning, quite likely redeveloping again this
afternoon and evening. Otherwise MVFR cigs/vsbys and areas IFR in
downpours.

Vicinity of KSFO...MVFR cig/vsby, heavy rain and wind today through
this evening. IFR possible at times in downpours.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...MVFR cigs/vsbys, heavy rain and wind
today through this evening. IFR possible at times in downpours.

&&

.MARINE...as of 2:55 AM PST Monday...A strong warm front with heavy
rain...wind and possible additional widely scattered thunderstorms
is moving rapidly eastward across the coastal waters and bays early
this morning. Extensively moist air originating from the subtropics
will become firmly entrenched across the entire area today. A cold
front over the eastern Pacific will move slowly in from the west
passing through the Bay Area this evening and the North Central
Coast by midnight. Gales are expected today with possible storm
force gusts over the bays later today. Marginally large swell
today over the coastal waters will result in hazardous seas.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tday...High Wind Warning...Higher terrain Bay Area to Monterey
			 and San Benito counties.
             Flood Watch...Entire forecast area.
             Wind Advisory...Entire forecast area.
             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
             SCA...Pt Arena to Pt Reyes 0-10 nm
             SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm
             SCA...Rough Bar Advisory for SF Bar
             SCA...Mry Bay until 1 PM
             GLW...Mry Bay from 1 PM
             SCA...SF Bay until 7 AM
             GLW...SF Bay from 7 AM

&&

PUBLIC FORECAST: RGass
AVIATION/MARINE: Canepa

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In the hours before

Special weather statement, Feb 20, 3:19 AM PST, 1 hour 44 minutes before
Special Weather Statement
National Weather Service San Francisco Bay Area
319 AM PST Mon Feb 20 2017

CAZ006-505>513-516>518-528>530-202300-
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
North Bay Interior Valleys-North Bay Mountains-
San Francisco Bay Shoreline-San Francisco Peninsula Coast-
East Bay Interior Valleys-East Bay Hills and the Diablo Range-
Santa Cruz Mountains-Santa Clara Valley Including San Jose-
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
Including the cities of...San Francisco...Tamalpais-Homestead...
Sausalito...Santa Rosa...South Santa Rosa...Napa...San Rafael...
Petaluma...Novato...Rohnert Park...Angwin...
Lagunitas-Forest Knolls...Woodacre...Oakland...Fremont...
Hayward...Daly City...Berkeley...Pacifica...Concord...Antioch...
Livermore...Walnut Creek...Pleasanton...Pittsburg...San Ramon...
Blackhawk...Scotts Valley...Boulder Creek...Day Valley...
San Jose...Greenfield...King City...Salinas...Santa Cruz...
Watsonville...Live Oak...Seaside...Monterey...Marina
319 AM PST Mon Feb 20 2017

...POTENT STORM SYSTEM AND ATMOSPHERIC RIVER LIKELY TO RESULT IN
WIDESPREAD FLOODING, STRONG WINDS AND INCREASED THREAT FOR
ROCK/MUD SLIDES, SHALLOW LANDSLIDES AND POTENTIAL DEBRIS FLOWS IN
HILLY TERRAIN AND RECENT BURN SCAR AREAS THROUGH TODAY...

Rainfall and winds continue to increase in coverage and intensity
early this Monday morning and will continue to do so through this
afternoon. Rainfall will be heavy at times, especially in the
North Bay region and along the southwest facing coastal slopes
resulting in the potential for life-threatening flooding. If you
have experienced flooding at any time this winter season, either
near your home or on your daily commute, the potential exists for
additional flooding in these areas during the next 12 to 18
hours.

In addition, southerly winds will increase this afternoon and
result in a heightened threat for downed trees and power lines
with the potential for isolated to scattered power outages. The
combination of heavy rainfall and strong winds will also give way
to widespread rock/mud slides, shallow landslides and potential
debris flows in hilly terrain and recent burn scar areas.

Residents are urged to remain vigilant and encouraged to stay up-
to-date with the lastest weather information throughout the day.
Those taking to area roadways should also check the latest
information from the California Highway Patrol and California
Department of Transportation for potential road closures.
Remember, "Turn Around, Don't Drown" when encountering flooded
roadways. It is NEVER safe to drive or walk into flood waters.

RGass

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 20, 3:53 AM PSTRiver Flood WarningMTRSanta Clara59 hr
Feb 20, 4:23 AM PSTFlash Flood WarningMTRMonterey3 hr
Feb 20, 7:07 AM PSTFlash Flood WarningMTRMonterey6 hr
Feb 20, 7:35 AM PSTAreal Flood AdvisoryMTRMarin, Napa, City and County of San Francisco, San Mateo, Sonoma3 hr
Feb 20, 7:40 AM PSTFlash Flood WarningMTRSanta Cruz6 hr
Feb 20, 7:44 AM PSTAreal Flood AdvisoryMTRSan Mateo, Santa Clara, Santa Cruz3 hr
Feb 20, 8:14 AM PSTFlash Flood WarningMTRMarin, Sonoma4 hr
Feb 20, 8:22 AM PSTAreal Flood WarningMTRSonoma60 hr
Feb 20, 8:56 AM PSTFlash Flood WarningMTRSan Benito6 hr
Feb 20, 9:04 AM PSTFlash Flood WarningMTRSanta Cruz6 hr
Feb 20, 10:13 AM PSTFlash Flood WarningMTRSan Benito, Santa Clara6 hr
Feb 20, 10:26 AM PSTFlash Flood WarningMTRAlameda6 hr
Feb 20, 10:34 AM PSTAreal Flood AdvisoryMTRMarin, Napa, City and County of San Francisco, San Mateo, Sonoma3 hr
Feb 20, 10:48 AM PSTAreal Flood AdvisoryMTRSan Mateo, Santa Clara, Santa Cruz3 hr
Feb 20, 11:21 AM PSTAreal Flood AdvisoryMTRAlameda, Contra Costa, Santa Clara3 hr
Feb 20, 1:32 PM PSTAreal Flood AdvisoryMTRMarin, Napa, City and County of San Francisco, San Mateo, Sonoma3 hr
Feb 20, 1:48 PM PSTAreal Flood AdvisoryMTRSan Mateo, Santa Clara, Santa Cruz3 hr
Feb 20, 2:14 PM PSTAreal Flood AdvisoryMTRMonterey4 hr
Feb 20, 2:24 PM PSTSmall Craft AdvisoryMTR18 hr
Feb 20, 2:40 PM PSTAreal Flood AdvisoryMTRSan Mateo65 min
Feb 20, 3:23 PM PSTAreal Flood WarningMTRSanta Clara6 hr

Nearby

River Flood Warnings in California, 2017Every river flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.