Alert archive / Washington / River Flood Warnings in 2021

River Flood Warning 84, NWS Seattle, WA

November 14, 2021Snohomish County, Washington

NWS Seattle, WA issued this river flood warning at Nov 14, 2021, 11:57 PM PST for Snohomish County, Washington. It took effect at Nov 15, 2021, 12:49 AM PST. It was in force for 25 hr.

The area

The outline as issued.

The facts

Issued: Nov 14, 2021, 11:57 PM PST (07:57 UTC)
In effect from: Nov 15, 2021, 12:49 AM PST
Expired: Nov 16, 2021, 1:57 AM PST
In force: 25 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Moderate

County Snohomish County, WA

The radar

The Seattle radar (KATX), 20 km from the middle of the area, began a volume at 07:59 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 Stillaguamish River at Arlington (ARLW1).

Action stage: 12.5 ft
Minor stage: 14 ft
Moderate stage: 17.5 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12167400, 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.

488 
WGUS46 KSEW 150757
FLWSEW

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
1157 PM PST Sun Nov 14 2021

...The National Weather Service in Seattle WA has issued a Flood 
Warning for the following rivers in Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

.Heavy rain will continue over the North Central Washington Cascades 
overnight into Monday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

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.

Additional information is available at www.weather.gov.

The next statement will be issued by Monday morning at 800 AM PST.

&&


WAC061-151600-
/O.NEW.KSEW.FL.W.0084.211115T0849Z-211116T2121Z/
/ARLW1.2.ER.211115T0849Z.211116T0000Z.211116T0920Z.NO/
1157 PM PST Sun Nov 14 2021

...FLOOD WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY 
AFTERNOON...

* WHAT...Moderate flooding is forecast.

* WHERE...Stillaguamish River At Arlington.

* WHEN...Until early Tuesday afternoon.

* IMPACTS...At 18.0 feet, the Stillaguamish River will flood many 
  roads including Hwy 530...Pioneer Highway...Marine Drive
  and numerous locations along Norman Rd. Swift waters will flood 
  residential areas near Silvana...Norman and Florence.  A stage of 
  18 feet on the Stillaguamish River corresponds roughly to Phase 3 
  in the Snohomish County Flood program.

* ADDITIONAL DETAILS...
  - At 11:25 PM PST Sunday the stage was 13.2 feet.
  - Forecast...The river is expected to rise above flood stage
    just after midnight tonight to a crest of 18.1 feet tomorrow
    afternoon. It will then fall below flood stage early Tuesday
    morning.
  - Flood stage is 14.0 feet.
  - Flood History...This crest compares to a previous crest of
    18.0 feet on 12/09/1956.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

44

5 follow-up statements

339 
WGUS86 KSEW 151516
FLSSEW

Flood Statement
National Weather Service Seattle WA
716 AM PST Mon Nov 15 2021

...The Flood Warning continues for the following rivers in 
Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

.A brief burst of heavy rain later this morning into this afternoon 
will keep the Stillaguamish river at Arlington near flood stage 
through this afternoon. The river will recede tonight into Tuesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

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

Additional information is available at www.weather.gov.

The next statement will be issued by this afternoon at 315 PM PST.

&&


WAC061-152330-
/O.EXT.KSEW.FL.W.0084.000000T0000Z-211116T1924Z/
/ARLW1.1.ER.211115T1200Z.211116T0600Z.211116T0724Z.NO/
716 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH TUESDAY 
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Stillaguamish River At Arlington.

* WHEN...Until late tomorrow morning.

* IMPACTS...At 14.0 feet, the Stillaguamish River will locally spill 
  over its banks.  Minor flooding around Silvana will occur...
  including over Pioneer Highway.  A stage of 14 feet on the 
  Stillaguamish River corresponds roughly to Phase 2 in the 
  Snohomish County Flood program.

* ADDITIONAL DETAILS...
  - At 5:25 AM PST Monday the stage was 13.9 feet.
  - Forecast...The river is expected to remain near flood stage
    through this afternoon then recede tonight.
  - Flood stage is 14.0 feet.
  - Flood History...This crest compares to a previous crest of
    14.9 feet on 11/17/2009.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

44

963 
WGUS86 KSEW 151815
FLSSEW

Flood Statement
National Weather Service Seattle WA
1015 AM PST Mon Nov 15 2021

...The Flood Warning is extended for the following rivers in 
Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

  Skagit River Near Mt. Vernon affecting Skagit County.

...The Flood Warning continues for the following rivers in 
Washington...

  Nooksack River At Ferndale affecting Whatcom County.

  Nooksack River At North Cedarville affecting Whatcom County.

  South Fork Nooksack River At Saxon Bridge affecting Whatcom 
  County.

  Skagit River Near Concrete affecting Skagit County.

.A brief burst of heavy rain later this morning into this afternoon 
will have a final push on the river levels but should only drive 
them up slightly more before the rains taper off.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

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

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

Additional information is available at www.weather.gov.

The next statement will be issued by this evening at 615 PM PST.

&&


WAC061-160215-
/O.EXT.KSEW.FL.W.0084.000000T0000Z-211116T2013Z/
/ARLW1.1.ER.211115T1200Z.211116T0600Z.211116T0813Z.NO/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH TUESDAY 
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Stillaguamish River At Arlington.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...At 14.0 feet, the Stillaguamish River will locally spill 
  over its banks.  Minor flooding around Silvana will occur...
  including over Pioneer Highway.  A stage of 14 feet on the 
  Stillaguamish River corresponds roughly to Phase 2 in the 
  Snohomish County Flood program.

* ADDITIONAL DETAILS...
  - At 9:40 AM PST Monday the stage was 12.3 feet.
  - Forecast...The river is expected to rise above flood stage
    late this afternoon to a crest of 15.1 feet late this
    evening. It will then fall below flood stage just after
    midnight tonight.
  - Flood stage is 14.0 feet.
  - Flood History...This crest compares to a previous crest of
    15.0 feet on 11/18/2003.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

WAC073-160215-
/O.EXT.KSEW.FL.W.0080.000000T0000Z-211118T1942Z/
/NKSW1.2.ER.211115T0348Z.211117T0000Z.211118T1041Z.NO/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH THURSDAY 
MORNING...

* WHAT...Minor flooding is occurring and moderate flooding is 
  forecast.

* WHERE...Nooksack River At Ferndale.

* WHEN...Until late Thursday morning.

* IMPACTS...At 20.5 feet, the Nooksack River will overflow levees 
  and banks along the east bank of the river from Hovander Park 
  downstream to Marietta, causing widespread flooding from near 
  Ferndale downstream to the mouth...with swift waters in 
  residential areas and over farm lands and roads. Erosion may 
  damage some river banks.


* ADDITIONAL DETAILS...
  - At 9:45 AM PST Monday the stage was 20.1 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:45 AM PST Monday was 20.1 feet.
  - Forecast...The river is expected to rise to a crest of 21.7
    feet tomorrow afternoon. It will then fall below flood stage
    early Thursday morning.
  - Flood stage is 18.0 feet.
  - Flood History...This crest compares to a previous crest of
    21.2 feet on 11/25/2004.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4889 12247 4887 12253 4878 12254 4876 12263
      4891 12262 4896 12247


$$

WAC057-160215-
/O.EXT.KSEW.FL.W.0079.000000T0000Z-211118T1132Z/
/MVEW1.3.ER.211115T0230Z.211116T1800Z.211117T2332Z.NR/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH LATE 
WEDNESDAY NIGHT...

* WHAT...Moderate flooding is occurring and major flooding is 
  forecast. This approaches the flood of record.

* WHERE...Skagit River Near Mt. Vernon.

* WHEN...Until early Thursday morning.

* IMPACTS...At 36.0 feet, the Skagit River will cause severe near 
  record flooding from Sedro Woolley downstream through Mount Vernon 
  to the mouth. Deep and swift flood waters will inundate and 
  possibly damage many roads...farmlands and residential areas. 
  Levees may be damaged.  Flood areas will also include headwaters...
  tributaries...and other streams in the Skagit basin. This level 
  for this location corresponds to a Phase 1 flood in the Skagit 
  County flood system.

* ADDITIONAL DETAILS...
  - At 9:45 AM PST Monday the stage was 31.6 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:45 AM PST Monday was 31.6 feet.
  - Forecast...The river is expected to rise to a crest of 37.6
    feet late tomorrow morning. It will then fall below flood
    stage Wednesday afternoon.
  - Flood stage is 28.0 feet.
  - Flood History...This crest compares to a previous crest of
    37.4 feet on 11/25/1990.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4846 12227 4840 12230 4830 12235 4837 12250
      4845 12240 4853 12227


$$

WAC073-160215-
/O.EXT.KSEW.FL.W.0078.000000T0000Z-211117T0125Z/
/NRKW1.3.ER.211114T2218Z.211115T1800Z.211116T1625Z.NR/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH TUESDAY 
AFTERNOON...

* WHAT...Major flooding is occurring and major flooding is forecast. 
  This approaches the flood of record.

* WHERE...Nooksack River At North Cedarville.

* WHEN...Until tomorrow afternoon.

* IMPACTS...At 150.0 feet, the Nooksack River will cause major near 
  record flooding downstream through Lynden. Deep and swift flood 
  waters will inundate farm lands...roads...and residential areas. 
  The flood may overtop levees. In addition...flood waters could 
  overflow and flood the Sumas drainage. Flooding will occur all 
  along the river including headwaters...tributaries...and other 
  streams within and near the Nooksack River Basin.

* ADDITIONAL DETAILS...
  - At 3:00 AM PST Monday the stage was 149.9 feet. The gage has
    not reported since.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 3:00 AM PST Monday was 149.9 feet.
  - Forecast...The river is expected to rise to a record crest of
    150.3 feet late this morning. It will then fall below flood
    stage tomorrow morning.
  - Flood stage is 146.5 feet.
  - Flood History...This crest compares to a previous crest of
    149.6 feet on 10/17/2003.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4880 12224 4885 12236 4889 12247 4896 12247
      4895 12233 4882 12215


$$

WAC073-160215-
/O.EXT.KSEW.FL.W.0074.000000T0000Z-211116T1126Z/
/NSSW1.2.ER.211114T2138Z.211115T1215Z.211116T0226Z.UU/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH LATE 
TONIGHT...

* WHAT...Moderate flooding is occurring and minor flooding is 
  forecast.

* WHERE...South Fork Nooksack River At Saxon Bridge.

* WHEN...Until late tonight.

* IMPACTS...At 8.5 feet, the Nooksack River flooding will be 
  widespread with swift water covering farm lands and many roads.  
  Highway 9 north of Acme may be impassable.  Erosion may affect 
  some river banks.

* ADDITIONAL DETAILS...
  - At 9:00 AM PST Monday the stage was 8.7 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:00 AM PST Monday was 9.5 feet.
  - Forecast...The river is expected to fall for awhile and then
    rise again to a crest of 8.3 feet late this afternoon. It
    will then fall below flood stage this evening.
  - Flood stage is 8.0 feet.
  - Flood History...This crest compares to a previous crest of
    8.5 feet on 01/08/2009.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4865 12219 4871 12226 4880 12224 4882 12215
      4873 12215 4865 12208


$$

WAC057-160215-
/O.EXT.KSEW.FL.W.0071.000000T0000Z-211117T2231Z/
/CONW1.3.ER.211114T1920Z.211115T1715Z.211117T1031Z.NO/
1015 AM PST Mon Nov 15 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING THROUGH WEDNESDAY 
AFTERNOON...

* WHAT...Major flooding is occurring and major flooding is forecast.

* WHERE...Skagit River Near Concrete.

* WHEN...Until early Wednesday afternoon.

* IMPACTS...At 37.0 feet, the Skagit River will cause major flooding 
  from Rockport downstream through Sedro Woolley. Deep and swift 
  flood waters will inundate many roads...farms...and some business 
  and residential areas especially Cape Horn...Hamilton...and 
  Thunderbird. Cockreham Island...the Nookachamps area and the 
  Sterling area will be inundated.  Levees east of Sedro Woolley may 
  be damaged.  This level for this location on the Skagit 
  corresponds to a Phase 1 flood in the Skagit County flood system.

* ADDITIONAL DETAILS...
  - At 9:45 AM PST Monday the stage was 38.6 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:45 AM PST Monday was 38.7 feet.
  - Forecast...The river crested and is expected to fall below
    flood stage early Wednesday morning and continue falling to
    25.0 feet early Thursday morning.
  - Flood stage is 28.0 feet.
  - Flood History...This crest compares to a previous crest of
    38.6 feet on 12/18/1979.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4845 12163 4848 12185 4846 12227 4853 12227
      4856 12185 4850 12160


$$

JBB

604 
WGUS86 KSEW 160043
FLSSEW

Flood Statement
National Weather Service Seattle WA
443 PM PST Mon Nov 15 2021

...Observed flooding changed to Minor severity for the following 
rivers in Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

.A brief burst of heavy rain earlier today is having a final push on 
the river levels but should only drive them up slightly more before 
the rains taper off.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

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.

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

Additional information is available at www.weather.gov.

The next statement will be issued by late tonight at 1245 AM PST.

&&


WAC061-160845-
/O.CON.KSEW.FL.W.0084.000000T0000Z-211116T2013Z/
/ARLW1.1.ER.211115T0856Z.211115T1032Z.211115T1324Z.NO/
443 PM PST Mon Nov 15 2021

...FLOOD WARNING REMAINS IN EFFECT FROM THIS AFTERNOON THROUGH 
TUESDAY AFTERNOON...

* WHAT...Minor flooding is occurring.

* WHERE...Stillaguamish River At Arlington.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...At 14.0 feet, the Stillaguamish River will locally spill 
  over its banks.  Minor flooding around Silvana will occur...
  including over Pioneer Highway.  A stage of 14 feet on the 
  Stillaguamish River corresponds roughly to Phase 2 in the 
  Snohomish County Flood program.

* ADDITIONAL DETAILS...
  - At 4:10 PM PST Monday the stage was 12.5 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 4:10 PM PST Monday was 14.3 feet.
  - Forecast...The river is expected to rise and crest at 13.9
    feet late this evening and then continue to fall on Tuesday.
  - Flood stage is 14.0 feet.
  - Flood History...No available flood history.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

JBB

100 
WGUS86 KSEW 160315
FLSSEW

Flood Statement
National Weather Service Seattle WA
715 PM PST Mon Nov 15 2021

...Forecast flooding changed to Minor severity for the following 
rivers in Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

.A brief burst of heavy rain earlier today is having a final push on 
the river levels, pushing it back above flood stage briefly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

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

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

Additional information is available at www.weather.gov.

The next statement will be issued by late tonight at 315 AM PST.

&&


WAC061-161115-
/O.CON.KSEW.FL.W.0084.000000T0000Z-211116T2013Z/
/ARLW1.1.ER.211115T0856Z.211116T0255Z.211116T0645Z.NO/
715 PM PST Mon Nov 15 2021

...FLOOD WARNING REMAINS IN EFFECT FROM THIS EVENING THROUGH TUESDAY 
AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Stillaguamish River At Arlington.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...At 14.0 feet, the Stillaguamish River will locally spill 
  over its banks.  Minor flooding around Silvana will occur...
  including over Pioneer Highway.  A stage of 14 feet on the 
  Stillaguamish River corresponds roughly to Phase 2 in the 
  Snohomish County Flood program.

* ADDITIONAL DETAILS...
  - At 6:55 PM PST Monday the stage was 15.1 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 6:55 PM PST Monday was 15.1 feet.
  - Forecast...The river is expected to crest in a matter of
    hours, and then fall below flood stage late this evening and
    continue falling to 3.1 feet Thursday afternoon.
  - Flood stage is 14.0 feet.
  - Flood History...This crest compares to a previous crest of
    15.0 feet on 11/18/2003.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

JBB

555 
WGUS86 KSEW 160957
FLSSEW

Flood Statement
National Weather Service Seattle WA
157 AM PST Tue Nov 16 2021

...The Flood Warning is cancelled for the following rivers in 
Washington...

  Stillaguamish River At Arlington affecting Snohomish County.

.Rain has come to an end over the lowlands and precipitation will be 
in the form of snow in the mountains. The Stillaguamish at Arlington 
is below flood stage and will continue to recede today.

WAC061-161100-
/O.CAN.KSEW.FL.W.0084.000000T0000Z-211116T0957Z/
/ARLW1.1.ER.211115T0856Z.211116T0325Z.211116T0612Z.NO/
157 AM PST Tue Nov 16 2021

...FLOOD WARNING IS CANCELLED EARLY THIS MORNING...

The Flood Warning is cancelled for
  the Stillaguamish River At Arlington.

* ADDITIONAL DETAILS...
  - At 1:10 AM PST Tuesday the stage was 11.3 feet.
  - Forecast...The river is below flood stage and will continue
    to recede through Thursday.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
      4823 12224 4824 12214


$$

44

The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 14, 6:22 PM PST	Areal Flood Advisory	SEW	Clallam	22 hr
Nov 14, 7:27 PM PST	High Wind Warning	SEW		24 hr
Nov 14, 8:14 PM PST	River Flood Warning	SEW	Clallam	31 hr
Nov 14, 9:08 PM PST	River Flood Warning	SEW	Clallam	30 hr
Nov 14, 9:50 PM PST	River Flood Warning	SEW	Skagit	50 hr
Nov 14, 11:59 PM PST	River Flood Warning	SEW	Snohomish	7 hr
Nov 15, 5:37 AM PST	Coastal Flood Advisory	SEW	San Juan	11 hr
Nov 15, 5:52 AM PST	Areal Flood Advisory	SEW	San Juan	10 hr
Nov 15, 5:55 AM PST	Areal Flood Advisory	SEW	Clallam, Jefferson	10 hr
Nov 15, 8:13 AM PST	Areal Flood Warning	SEW	Skagit, Whatcom	32 hr
Nov 15, 11:17 AM PST	Winter Weather Advisory	SEW		23 hr
Nov 15, 12:18 PM PST	Special Weather Statement	SEW	Skagit, Snohomish	57 min
Nov 15, 2:11 PM PST	Gale Warning	SEW		13 hr
Nov 15, 3:22 PM PST	Wind Advisory	SEW		4 hr

Nearby

River Flood Warnings in Washington, 2021 Every river flood warning in 2021

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.