Alert archive / Washington / River Flood Warnings in 2021

River Flood Warning 91, NWS Seattle, WA

November 28, 2021King County, Washington

NWS Seattle, WA issued this river flood warning at Nov 28, 2021, 1:40 AM PST for King County, Washington. It took effect at Nov 28, 2021, 3:29 AM PST. It was in force for 20 hr.

The area

The outline as issued.

The facts

Issued: Nov 28, 2021, 1:40 AM PST (09:40 UTC)
In effect from: Nov 28, 2021, 3:29 AM PST
Expired: Nov 28, 2021, 11:28 PM PST
In force: 20 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County King County, WA

The radar

The Seattle radar (KATX), 90 km from the middle of the area, began a volume at 09:44 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 Snoqualmie River at Snoqualmie Falls (SQUW1). The gauge peaked at 12.72 ft at Nov 28, 2021, 5:00 AM PST.

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12144500, 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.

552 
WGUS46 KSEW 280940
FLWSEW

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
140 AM PST Sun Nov 28 2021

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

.Moderate to heavy rain will continue along the North Central 
Washington Cascades will continue through Sunday night.

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 this afternoon at 415 PM PST.

&&


WAC033-290000-
/O.NEW.KSEW.FL.W.0091.211128T1129Z-211129T0728Z/
/SQUW1.1.ER.211128T1129Z.211128T1800Z.211128T2227Z.NO/
140 AM PST Sun Nov 28 2021

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

* WHAT...Minor flooding is forecast.

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until late this evening.

* IMPACTS...At 30000.0 cfs, the Snoqualmie River will cause 
  widespread flooding of pasture lands and roads along the river 
  from the town of Snoqualmie downstream through Fall City. Roads 
  that may become flooded include Fall City-Carnation...Tolt Hill...
  and Novelty Flats Roads. This river level on the Snoqualmie 
  corresponds roughly to a phase 3 flood in the King County flood 
  system.

* ADDITIONAL DETAILS...
  - At 12:30 AM PST Sunday the flow was 13000.0 cfs.
  - Forecast...The river will rise above flood stage early this
    morning to 30550.0 cfs late this morning. It will then fall
    below flood stage this afternoon to 15337.7 cfs.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    30400.0 cfs on 03/19/1997.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
      4758 12178 4756 12170


$$

45

3 follow-up statements

872 
WGUS86 KSEW 281733
FLSSEW

Flood Statement
National Weather Service Seattle WA
933 AM PST Sun Nov 28 2021

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

  Skykomish River Near Gold Bar affecting Snohomish County.

.Moderate to heavy rain will return along the North Central 
Washington Cascades will continue through Sunday night. While the 
pause in rainfall overnight halted the initial river rises, they 
will rise again this afternoon and evening to potentially reaching 
flood stage.

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 1245 PM PST.

&&


WAC033-290145-
/O.CON.KSEW.FL.W.0091.000000T0000Z-211129T0728Z/
/SQUW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
933 AM PST Sun Nov 28 2021

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

* WHAT...No flooding is currently forecast.

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until late this evening.

* IMPACTS...At 12000.0 cfs, the Snoqualmie River will spill over its 
  banks between the town of Snoqualmie and Fall City...covering 
  pasture lands and several roads along the river. This river level 
  on the Snoqualmie corresponds roughly to a phase 2 flood in the 
  King County flood system.

* ADDITIONAL DETAILS...
  - At 8:30 AM PST Sunday the flow was 15900.0 cfs.
  - Forecast...The river will begin rising late this afternoon to
    near flood stage, though may fall short of that.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    78800.0 cfs on 11/24/1990.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
      4758 12178 4756 12170


$$

WAC061-282045-
/O.CON.KSEW.FL.W.0090.000000T0000Z-211128T2034Z/
/GLBW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
933 AM PST Sun Nov 28 2021

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

* WHAT...No flooding is currently forecast.

* WHERE...Skykomish River Near Gold Bar.

* WHEN...Until this afternoon.

* ADDITIONAL DETAILS...
  - At 8:30 AM PST Sunday the stage was 13.5 feet.
  - Forecast...The river will begin rising late this afternoon to
    near flood stage, though may fall short of that.
  - Flood stage is 15.0 feet.
  - Flood History...This crest compares to a previous crest of
    13.1 feet on 10/29/2012.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4774 12150 4780 12173 4780 12196 4793 12197
      4794 12169 4787 12147


$$

JBB

437 
WGUS86 KSEW 281735 CCA
FLSSEW

Flood Statement...CORRECTED
National Weather Service Seattle WA
935 AM PST Sun Nov 28 2021

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

  Skykomish River Near Gold Bar affecting Snohomish County.

.Moderate to heavy rain will return along the North Central 
Washington Cascades will continue through Sunday night. While the 
pause in rainfall overnight halted the initial river rises, they 
will rise again this afternoon and evening to potentially reaching 
flood stage.

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 1245 PM PST.

&&


WAC033-290145-
/O.CON.KSEW.FL.W.0091.000000T0000Z-211129T0728Z/
/SQUW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
935 AM PST Sun Nov 28 2021

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

* WHAT...No flooding is currently forecast.

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until late this evening.

* IMPACTS...At 12000.0 cfs, the Snoqualmie River will spill over its 
  banks between the town of Snoqualmie and Fall City...covering 
  pasture lands and several roads along the river. This river level 
  on the Snoqualmie corresponds roughly to a phase 2 flood in the 
  King County flood system.

* ADDITIONAL DETAILS...
  - At 8:30 AM PST Sunday the flow was 15900.0 cfs.
  - Forecast...The river will begin rising late this afternoon to
    near flood stage, though may fall short of that.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    78800.0 cfs on 11/24/1990.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
      4758 12178 4756 12170


$$

WAC061-282045-
/O.COR.KSEW.FL.W.0090.000000T0000Z-211128T2034Z/
/GLBW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
935 AM PST Sun Nov 28 2021

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

* WHAT...No flooding is currently forecast.

* WHERE...Skykomish River Near Gold Bar.

* WHEN...Until late this afternoon.

* ADDITIONAL DETAILS...
  - At 8:30 AM PST Sunday the stage was 13.5 feet.
  - Forecast...The river will begin rising late this afternoon to
    near flood stage, though may fall short of that.
  - Flood stage is 15.0 feet.
  - Flood History...This crest compares to a previous crest of
    13.1 feet on 10/29/2012.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4774 12150 4780 12173 4780 12196 4793 12197
      4794 12169 4787 12147


$$

JBB

329 
WGUS86 KSEW 282043
FLSSEW

Flood Statement
National Weather Service Seattle WA
1243 PM PST Sun Nov 28 2021

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

  Skykomish River Near Gold Bar affecting Snohomish County.

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

.The rainfall still to come will no longer be enough to raise the 
Skykomish or Snoqualmie Rivers above flood stage.

WAC033-282145-
/O.CAN.KSEW.FL.W.0091.000000T0000Z-211128T2043Z/
/SQUW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1243 PM PST Sun Nov 28 2021

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

The Flood Warning is cancelled for
  the Snoqualmie River Near Snoqualmie Falls.

* ADDITIONAL DETAILS...
  - At 11:30 AM PST Sunday the flow was 13400.0 cfs.
  - Forecast...The river crested and will continue to fall today
    with some leveling off or small rises possible.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
      4758 12178 4756 12170


$$

WAC061-282145-
/O.EXP.KSEW.FL.W.0090.000000T0000Z-211128T2034Z/
/GLBW1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1243 PM PST Sun Nov 28 2021

...FLOOD WARNING HAS EXPIRED THIS AFTERNOON...

The Flood Warning has expired for
  the Skykomish River Near Gold Bar.

* ADDITIONAL DETAILS...
  - At 11:30 AM PST Sunday the stage was 12.8 feet.
  - Forecast...The river will fall to 12.3 feet and then begin
    rising late this afternoon. It will rise and crest around
    13.1 feet late tonight.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4774 12150 4780 12173 4780 12196 4793 12197
      4794 12169 4787 12147


$$

JBB

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 27, 7:18 PM PST	Areal Flood Advisory	SEW	San Juan, Skagit, Whatcom	25 hr
Nov 27, 7:22 PM PST	Areal Flood Advisory	SEW	Clallam, Grays Harbor, Jefferson	25 hr
Nov 27, 8:59 PM PST	River Flood Warning	SEW	Mason	52 hr
Nov 27, 11:59 PM PST	Wind Advisory	SEW		10 hr
Nov 28, 1:13 AM PST	River Flood Warning	SEW	Clallam	19 hr
Nov 28, 1:29 AM PST	River Flood Warning	SEW	Whatcom	24 hr
Nov 28, 1:29 AM PST	River Flood Warning	SEW	Whatcom	22 hr
Nov 28, 1:36 AM PST	River Flood Warning	SEW	Snohomish	11 hr
Nov 28, 2:20 AM PST	Small Craft Advisory	SEW		12 hr
Nov 28, 4:20 AM PST	River Flood Warning	SEW	Skagit	47 hr
Nov 28, 8:58 AM PST	River Flood Warning	SEW	Whatcom	4 days
Nov 28, 8:58 AM PST	River Flood Warning	SEW	Skagit	51 hr
Nov 28, 2:51 PM PST	Areal Flood Warning	SEW	Whatcom	43 hr
Nov 28, 3:27 PM PST	River Flood Warning	SEW	Skagit	23 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.