Alert archive / Washington / River Flood Warnings in 2021

River Flood Warning 72, NWS Seattle, WA

November 14, 2021King County, Washington

NWS Seattle, WA issued this river flood warning at Nov 14, 2021, 9:33 AM PST for King County, Washington. It was in force for 21 hr.

The area

The outline as issued.

The facts

Issued: Nov 14, 2021, 9:33 AM PST (17:33 UTC)
Expired: Nov 15, 2021, 7:02 AM PST
In force: 21 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 17:33 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 14.67 ft at Nov 14, 2021, 3:00 PM 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.

072 
WGUS46 KSEW 141733
FLWSEW

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
933 AM PST Sun Nov 14 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.

.Persistent rainfall is driving the water level up at Snoqualmie 
Falls. It will rise above flood stage and crest later today before 
falling later tonight and rising again 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.

Additional information is available at www.weather.gov.

The next statement will be issued by this afternoon at 530 PM PST.

&&


WAC033-150145-
/O.NEW.KSEW.FL.W.0072.211114T1733Z-211116T1640Z/
/SQUW1.1.ER.211114T1830Z.211115T0600Z.211116T0739Z.NO/
933 AM PST Sun Nov 14 2021

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

* WHAT...Minor flooding is forecast.

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until Tuesday morning.

* IMPACTS...At 20000.0 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 9:15 AM PST Sunday the flow was 19700.0 cfs.
  - Forecast...The river will rise above flood stage late this
    morning to 26659.2 cfs late this evening. It will then fall
    tonight and begin rising again late tomorrow morning. It will
    rise to 22421.2 cfs by late tomorrow evening. It will then
    fall below flood stage late tomorrow evening.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    26600.0 cfs on 02/21/1961.
  - http://www.weather.gov/safety/flood

&&

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


$$

Pullin

3 follow-up statements

886 
WGUS86 KSEW 150056
FLSSEW

Flood Statement
National Weather Service Seattle WA
456 PM PST Sun Nov 14 2021

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

.The Snoqualmie River near Snoqualmie Falls will crest tonight.

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 late tonight at 100 AM PST.

&&


WAC033-150900-
/O.EXT.KSEW.FL.W.0072.000000T0000Z-211115T2120Z/
/SQUW1.1.ER.211114T1724Z.211115T0600Z.211115T1220Z.NO/
456 PM PST Sun Nov 14 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY 
AFTERNOON...

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

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...At 20000.0 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 4:00 PM PST Sunday the flow was 24600.0 cfs.
  - Recent Activity...The maximum river flow in the 24 hours
    ending at 4:00 PM PST Sunday was 24600.0 cfs.
  - Forecast...The river will rise to 27752.4 cfs late this
    evening. It will then fall below flood stage late tonight to
    13932.7 cfs and begin rising again late tomorrow morning. It
    will rise to 17488.2 cfs late tomorrow evening. It will then
    fall again and remain below flood stage.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    27200.0 cfs on 01/19/1971.
  - http://www.weather.gov/safety/flood

&&

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


$$

33

138 
WGUS86 KSEW 150746
FLSSEW

Flood Statement
National Weather Service Seattle WA
1146 PM PST Sun Nov 14 2021

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

.Heavy rain will ease over the Central Washington Cascades overnight 
then briefly pick up again later Monday morning into Monday 
afternoon. Snow levels will drop significantly Monday afternoon.

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 745 AM PST.

&&


WAC033-151600-
/O.EXT.KSEW.FL.W.0072.000000T0000Z-211115T1811Z/
/SQUW1.1.ER.211114T1724Z.211115T0045Z.211115T0911Z.NO/
1146 PM PST Sun Nov 14 2021

...FLOOD WARNING NOW IN EFFECT FROM THIS EVENING THROUGH MONDAY 
MORNING...

* WHAT...Minor flooding is occurring.

* WHERE...Snoqualmie River Near Snoqualmie Falls.

* WHEN...Until late tomorrow morning.

* IMPACTS...At 20000.0 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 11:15 PM PST Sunday the flow was 21100.0 cfs.
  - Recent Activity...The maximum river flow in the 24 hours
    ending at 11:15 PM PST Sunday was 24600.0 cfs.
  - Forecast...The river is expected to fall below flood stage
    just after midnight tonight and continue falling through
    Wednesday.
  - Flood flow is 20000.0 cfs.
  - Flood History...This crest compares to a previous crest of
    20800.0 cfs on 12/13/1966.
  - http://www.weather.gov/safety/flood

&&

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


$$

44

667 
WGUS86 KSEW 151502
FLSSEW

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

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

  Snoqualmie River Near Snoqualmie Falls affecting King County.

.Outside of a brief burst of heavy rain around midday the Snoqualmie 
river at the Falls will continue to recede today. Snow levels will 
drop significantly this afternoon and tonight with precipitation in 
the Central Cascades changing to snow.

WAC033-151615-
/O.CAN.KSEW.FL.W.0072.000000T0000Z-211115T1502Z/
/SQUW1.1.ER.211114T1724Z.211115T0045Z.211115T1045Z.NO/
702 AM PST Mon Nov 15 2021

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

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

* ADDITIONAL DETAILS...
  - At 5:15 AM PST Monday the flow was 18800.0 cfs.
  - Forecast...The river is expected to recede most of the day
    with a brief tick upwards in the middle of the day.
  - http://www.weather.gov/safety/flood

&&

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


$$

44

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 14, 3:07 AM PST	Gale Warning	SEW		43 hr
Nov 14, 3:22 AM PST	River Flood Warning	SEW	Snohomish	47 hr
Nov 14, 6:43 AM PST	River Flood Warning	SEW	Skagit	4 days
Nov 14, 8:30 AM PST	Storm Watch	SEW		6 hr
Nov 14, 10:33 AM PST	River Flood Warning	SEW	Skagit	46 hr
Nov 14, 10:40 AM PST	River Flood Warning	SEW	Whatcom	38 hr
Nov 14, 11:02 AM PST	River Flood Warning	SEW	Snohomish	57 hr
Nov 14, 11:02 AM PST	River Flood Warning	SEW	Snohomish	62 hr
Nov 14, 11:20 AM PST	River Flood Warning	SEW	King	60 hr
Nov 14, 11:50 AM PST	River Flood Warning	SEW	Whatcom	50 hr
Nov 14, 12:49 PM PST	River Flood Warning	SEW	Skagit	5 days
Nov 14, 1:09 PM PST	Areal Flood Advisory	SEW	Skagit, Whatcom	19 hr
Nov 14, 1:28 PM PST	River Flood Warning	SEW	Whatcom	3 days
Nov 14, 2:15 PM PST	Storm Warning	SEW		29 hr
Nov 14, 3:15 PM PST	High Wind Watch	SEW		4 hr
Nov 14, 3:40 PM PST	Areal Flood Warning	SEW	Whatcom	48 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.