Alert archive / Washington / River Flood Warnings in 2021

River Flood Warning 67, NWS Seattle, WA

November 12, 2021Snohomish County, Washington

NWS Seattle, WA issued this river flood warning at Nov 12, 2021, 1:46 PM PST for Snohomish County, Washington. It took effect at Nov 12, 2021, 8:36 PM PST. It was in force for 16 hr.

The area

The outline as issued.

The facts

Issued: Nov 12, 2021, 1:46 PM PST (21:46 UTC)
In effect from: Nov 12, 2021, 8:36 PM PST
Expired: Nov 13, 2021, 12:52 PM PST
In force: 16 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County Snohomish County, WA

The radar

The Seattle radar (KATX), 52 km from the middle of the area, began a volume at 21:48 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 Snohomish River near Monroe (MROW1). The gauge peaked at 15.82 ft at Nov 13, 2021, 2:00 AM PST.

Action stage: 10 ft
Minor stage: 15 ft
Moderate stage: 16 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12150800, 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.

847 
WGUS46 KSEW 122146
FLWSEW

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
146 PM PST Fri Nov 12 2021

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

  Snohomish River At Snohomish affecting Snohomish County.

  Snohomish River Near Monroe affecting Snohomish County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 evening at 945 PM PST.

&&


WAC061-130600-
/O.NEW.KSEW.FL.W.0066.211113T0348Z-211114T1500Z/
/SNAW1.2.ER.211113T0348Z.211113T1200Z.211114T0500Z.NO/
146 PM PST Fri Nov 12 2021

...FLOOD WARNING IN EFFECT FROM THIS EVENING THROUGH SUNDAY 
MORNING...

* WHAT...Moderate flooding is forecast.

* WHERE...Snohomish River At Snohomish.

* WHEN...From this evening to Sunday morning.

* IMPACTS...At 27.0 feet, the Snohomish River will flood several 
  roads...including the Snohomish-Monroe highway...and low areas of 
  the lower Snohomish valley that are not protected by levees.  A 
  stage of 27 feet on the Snohomish River corresponds roughly to a 
  Phase 2 in the Snohomish County flood program.

* ADDITIONAL DETAILS...
  - At 1:00 PM PST Friday the stage was 22.4 feet.
  - Forecast...The river will rise above flood stage this evening
    to 27.5 feet late tonight. It will then fall below flood
    stage late tomorrow evening to 22.7 feet and begin rising
    again late Sunday morning. It will then rise above flood
    stage again early Monday afternoon.
  - Flood stage is 25.0 feet.
  - Flood History...This crest compares to a previous crest of
    27.5 feet on 11/21/1958.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4786 12217 4789 12221 4796 12232 4809 12216
      4794 12213 4791 12203


$$

WAC061-130600-
/O.NEW.KSEW.FL.W.0067.211113T0436Z-211114T0200Z/
/MROW1.1.ER.211113T0436Z.211113T1200Z.211113T1542Z.NO/
146 PM PST Fri Nov 12 2021

...FLOOD WARNING IN EFFECT FROM THIS EVENING THROUGH SATURDAY 
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Snohomish River Near Monroe.

* WHEN...From this evening to tomorrow evening.

* IMPACTS...At 15.0 feet, the Snohomish River will cause minor 
  flooding of low pasture lands and several roads near the river.  A 
  stage of 15 feet at this location corresponds to Phase 2 in the 
  Snohomish County Flood Warning System.

* ADDITIONAL DETAILS...
  - At 1:15 PM PST Friday the stage was 12.3 feet.
  - Forecast...The river is expected to rise above flood stage
    this evening to a crest of 15.9 feet late tonight. It will
    then fall below flood stage tomorrow morning.
  - Flood stage is 15.0 feet.
  - Flood History...This crest compares to a previous crest of
    15.9 feet on 02/24/1986.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
      4793 12202 4793 12190


$$

Wolcott

4 follow-up statements

241 
WGUS86 KSEW 130437
FLSSEW

Flood Statement
National Weather Service Seattle WA
837 PM PST Fri Nov 12 2021

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

  Tolt River Above Carnation affecting King County.

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

  Snohomish River Near Monroe affecting Snohomish County.

  Snohomish River At Snohomish affecting Snohomish County.

  Snoqualmie River Near Carnation affecting King County.

.Heavy rain is over allowing some rivers to fall while larger rivers 
are still rising.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 this evening at 945 PM PST.

&&


WAC033-130545-
/O.CAN.KSEW.FL.W.0053.000000T0000Z-211113T0437Z/
/TOLW1.1.ER.211112T1447Z.211116T0000Z.000000T0000Z.NO/
837 PM PST Fri Nov 12 2021

...FLOOD WARNING IS CANCELLED THIS EVENING...

The Flood Warning is cancelled for
  the Tolt River Above Carnation.

* ADDITIONAL DETAILS...
  - At 2:15 PM PST Friday the flow was 4510.0 cfs.
  - Forecast...The river crested near flood stage and will
    continue to fall.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4768 12176 4761 12185 4761 12194 4767 12196
      4771 12189 4774 12184


$$

WAC061-131245-
/O.EXT.KSEW.FL.W.0067.000000T0000Z-211113T2326Z/
/MROW1.1.ER.211113T0419Z.211113T1200Z.211113T1451Z.NO/
837 PM PST Fri Nov 12 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS EVENING THROUGH SATURDAY 
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Snohomish River Near Monroe.

* WHEN...Until tomorrow afternoon.

* IMPACTS...At 15.0 feet, the Snohomish River will cause minor 
  flooding of low pasture lands and several roads near the river.  A 
  stage of 15 feet at this location corresponds to Phase 2 in the 
  Snohomish County Flood Warning System.

* ADDITIONAL DETAILS...
  - At 7:15 PM PST Friday the stage was 14.6 feet.
  - Forecast...The river will rise above flood stage this evening
    to 15.9 feet late tonight. It will then fall below flood
    stage tomorrow morning and begin rising again early Sunday
    morning.
  - Flood stage is 15.0 feet.
  - Flood History...This crest compares to a previous crest of
    15.7 feet on 03/25/2007.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
      4793 12202 4793 12190


$$

WAC061-131245-
/O.EXT.KSEW.FL.W.0066.000000T0000Z-211114T0905Z/
/SNAW1.2.ER.211113T0420Z.211113T1210Z.211114T0019Z.NO/
837 PM PST Fri Nov 12 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS EVENING THROUGH LATE 
SATURDAY NIGHT...

* WHAT...Moderate flooding is forecast.

* WHERE...Snohomish River At Snohomish.

* WHEN...Until early Sunday morning.

* IMPACTS...At 27.0 feet, the Snohomish River will flood several 
  roads...including the Snohomish-Monroe highway...and low areas of 
  the lower Snohomish valley that are not protected by levees.  A 
  stage of 27 feet on the Snohomish River corresponds roughly to a 
  Phase 2 in the Snohomish County flood program.

* ADDITIONAL DETAILS...
  - At 7:00 PM PST Friday the stage was 24.4 feet.
  - Forecast...The river will rise above flood stage this evening
    to 27.1 feet late tonight. It will then fall below flood
    stage tomorrow evening to 23.0 feet and begin rising again
    late Sunday morning.
  - Flood stage is 25.0 feet.
  - Flood History...This crest compares to a previous crest of
    27.3 feet on 12/16/1999.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4786 12217 4789 12221 4796 12232 4809 12216
      4794 12213 4791 12203


$$

WAC033-131245-
/O.EXT.KSEW.FL.W.0063.000000T0000Z-211114T0729Z/
/CRNW1.2.ER.211112T2202Z.211113T1200Z.211113T2210Z.NO/
837 PM PST Fri Nov 12 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS EVENING THROUGH SATURDAY 
EVENING...

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

* WHERE...Snoqualmie River Near Carnation.

* WHEN...Until late tomorrow evening.

* IMPACTS...At 56.0 feet, the Snoqualmie River will cause widespread 
  flooding from Fall City downstream through Carnation and Duvall...
  inundating much of the farm land and numerous roads.

* ADDITIONAL DETAILS...
  - At 8:00 PM PST Friday the stage was 55.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 8:00 PM PST Friday was 55.2 feet.
  - Forecast...The river is expected to rise to a crest of 57.2
    feet late tonight. The river will then fall below flood stage
    tomorrow afternoon. Additional rises are expected.
  - Flood stage is 54.0 feet.
  - Flood History...This crest compares to a previous crest of
    57.1 feet on 02/22/2012.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4756 12196 4770 12204 4784 12202 4783 12194
      4771 12193 4761 12188


$$

JBB

504 
WGUS86 KSEW 130852
FLSSEW

Flood Statement
National Weather Service Seattle WA
1252 AM PST Sat Nov 13 2021

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

  Snohomish River Near Monroe affecting Snohomish County.

.Heavy rain is over allowing some rivers to fall while larger rivers 
are still rising.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 this morning at 945 AM PST.

&&


WAC061-131700-
/O.EXT.KSEW.FL.W.0067.000000T0000Z-211113T2110Z/
/MROW1.1.ER.211113T0419Z.211113T1200Z.211113T1516Z.NO/
1252 AM PST Sat Nov 13 2021

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

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

* WHERE...Snohomish River Near Monroe.

* WHEN...Until this afternoon.

* IMPACTS...At 15.0 feet, the Snohomish River will cause minor 
  flooding of low pasture lands and several roads near the river.  A 
  stage of 15 feet at this location corresponds to Phase 2 in the 
  Snohomish County Flood Warning System.
  Forecast... The river is expected to crest at 15.9 feet late 
  tonight, then fall below flood stage Saturday morning. Additional 
  rises are possible thereafter.

&&

LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
      4793 12202 4793 12190


$$

45

272 
WGUS86 KSEW 131634
FLSSEW

Flood Statement
National Weather Service Seattle WA
834 AM PST Sat Nov 13 2021

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

  Snohomish River Near Monroe affecting Snohomish County.

.Heavy rain is over allowing with rivers cresting and falling.

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 115 PM PST.

&&


WAC061-132115-
/O.CON.KSEW.FL.W.0067.000000T0000Z-211113T2110Z/
/MROW1.1.ER.211113T0419Z.211113T1200Z.211113T1516Z.NO/
834 AM PST Sat Nov 13 2021

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

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

* WHERE...Snohomish River Near Monroe.

* WHEN...Until this afternoon.

* IMPACTS...At 15.0 feet, the Snohomish River will cause minor 
  flooding of low pasture lands and several roads near the river.  A 
  stage of 15 feet at this location corresponds to Phase 2 in the 
  Snohomish County Flood Warning System.

Forecast... The river has crested and is falling this morning. 
Expect the river to fall below flood stage by early this afternoon. 
Additional rises are possible thereafter.

&&

LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
      4793 12202 4793 12190


$$

Pullin

441 
WGUS86 KSEW 132052
FLSSEW

Flood Statement
National Weather Service Seattle WA
1252 PM PST Sat Nov 13 2021

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

  Snohomish River Near Monroe affecting Snohomish County.

.The Snohomish River near Monroe will continue to recede today.

WAC061-132200-
/O.CAN.KSEW.FL.W.0067.000000T0000Z-211113T2052Z/
/MROW1.1.ER.211113T0419Z.211113T1200Z.211116T1526Z.NO/
1252 PM PST Sat Nov 13 2021

...FLOOD WARNING IS CANCELLED THIS AFTERNOON...

The Flood Warning is cancelled for
  the Snohomish River Near Monroe.

&&

LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
      4793 12202 4793 12190


$$

33

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 11, 4:00 PM PST	River Flood Warning	SEW	Pierce	37 hr
Nov 11, 4:04 PM PST	River Flood Warning	SEW	King	37 hr
Nov 11, 7:57 PM PST	River Flood Warning	SEW	Lewis	41 hr
Nov 11, 8:20 PM PST	River Flood Warning	SEW	Pierce	30 hr
Nov 11, 8:52 PM PST	River Flood Warning	SEW	Lewis	4 days
Nov 11, 8:56 PM PST	River Flood Warning	SEW	Lewis	15 hr
Nov 12, 3:39 AM PST	River Flood Warning	SEW	Snohomish	22 hr
Nov 12, 3:39 AM PST	River Flood Warning	SEW	Snohomish	24 hr
Nov 12, 3:39 AM PST	River Flood Warning	SEW	Skagit	26 hr
Nov 12, 6:38 AM PST	River Flood Warning	SEW	King	45 hr
Nov 12, 11:56 AM PST	River Flood Warning	SEW	Grays Harbor, Thurston	40 hr
Nov 12, 1:23 PM PST	Areal Flood Advisory	SEW	King, Snohomish	3 hr
Nov 12, 1:40 PM PST	River Flood Warning	SEW	Pierce	15 hr
Nov 12, 1:46 PM PST	River Flood Warning	SEW	Snohomish	41 hr
Nov 12, 2:24 PM PST	Gale Watch	SEW		12 hr
Nov 12, 2:24 PM PST	Small Craft Advisory	SEW		4 days

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.