Alert archive / Washington / River Flood Warnings in 2021

River Flood Warning 31, NWS Seattle, WA

February 22, 2021Pierce County, Washington

NWS Seattle, WA issued this river flood warning at Feb 22, 2021, 7:01 PM PST for Pierce County, Washington. It took effect at Feb 22, 2021, 9:35 PM PST. It was in force for 31 min.

The area

The outline as issued.

The facts

Issued
Feb 22, 2021, 7:01 PM PST (03:01 UTC)
In effect from
Feb 22, 2021, 9:35 PM PST
Expired
Feb 22, 2021, 10:06 PM PST
In force
31 min
Issued by
NWS Seattle, WA
Area
Storm-based polygon
Flood severity
Minor

County Pierce County, WA

The radar

The Seattle radar (KATX), 129 km from the middle of the area, began a volume at 03:04 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 South Prairie Creek at South Prairie (SPEW1). The gauge peaked at 29.13 ft at Feb 22, 2021, 6:00 PM PST.

2426283002/2302/24

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12095000, 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.

647 
WGUS46 KSEW 230301
FLWSEW

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
701 PM PST Mon Feb 22 2021

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

  South Prairie Creek at South Prairie affecting Pierce County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

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 300 AM PST.

&&


WAC053-231115-
/O.NEW.KSEW.FL.W.0031.210223T0535Z-210223T1514Z/
/SPEW1.1.ER.210223T0535Z.210223T0600Z.210223T0613Z.NO/
701 PM PST Mon Feb 22 2021

The National Weather Service in Seattle has issued a

* Flood Warning for
  the South Prairie Creek at South Prairie.
* Until Tuesday morning.
* At 5:45 PM PST Monday the flow was 3690.0 cfs.
* Flood flow is 4000.0 cfs.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late 
  this evening to a crest of 4030 cfs tonight, then fall below flood 
  stage early Tuesday morning.
* Impact...At 4000.0 cfs, South Prairie Creek will flood low lying 
  areas and roads from the Town of South Prairie downstream to the 
  Carbon River near Orting.


&&

LAT...LON 4708 12205 4707 12207 4706 12208 4706 12210
      4708 12209 4709 12205

$$

Cullen
2 follow-up statements
748 
WGUS86 KSEW 230429
FLSSEW

Flood Statement
National Weather Service Seattle WA
829 PM PST Mon Feb 22 2021

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

  Skokomish River At Potlatch affecting Mason County.

  Snoqualmie River Near Carnation affecting King County.

  Newaukum River Near Chehalis affecting Lewis County.

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

  South Prairie Creek at South Prairie affecting Pierce County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

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 Tuesday morning at 630 AM PST.

&&


WAC041-231430-
/O.EXT.KSEW.FL.W.0030.210223T0429Z-210224T0316Z/
/NEWW1.1.ER.210223T0350Z.210223T1200Z.210223T1816Z.NO/
829 PM PST Mon Feb 22 2021

...The Flood Warning is now in effect until tomorrow evening...

The Flood Warning continues for
  the Newaukum River Near Chehalis.
* From this evening to Tuesday evening.
* At 7:45 PM PST Monday the stage was 202.5 feet.
* Flood stage is 202.5 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to rise to a crest of 204.3 feet 
  late tonight. It will then fall below flood stage Tuesday morning.
* Impact...At 202.5 feet, flood waters will inundate many roads and 
  residential and commercial areas along the Newaukum River and its 
  forks.  Flooding in some areas may be deep and hazardous 
  especially near rivers. Impacted roadways and surrounding areas 
  include Jackson Hwy. and Tune, Rush, Sommerville, Griel, Hamilton, 
  Tauscher, Guerrier, Kirkland, Macomber, Rice, Senn, Lucas Creek, 
  Middle Fork, and North Fork Roads.  A stage of 10.5 on the 
  Newaukum roughly corresponds to Phase 2 flood in the Lewis County 
  flood system.


&&

LAT...LON 4657 12248 4652 12289 4662 12305 4675 12295
      4668 12286 4676 12264

$$

WAC045-231430-
/O.EXT.KSEW.FL.W.0027.000000T0000Z-210223T2156Z/
/SRPW1.1.ER.210222T1453Z.210223T0345Z.210223T1256Z.NO/
829 PM PST Mon Feb 22 2021

...The Flood Warning is now in effect until early tomorrow 
afternoon...

The Flood Warning continues for
  the Skokomish River At Potlatch.
* Until Tuesday afternoon.
* At 8:00 PM PST Monday the stage was 16.7 feet.
* Flood stage is 16.5 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 8:00 PM PST Monday was 16.7 feet.
* Forecast...The river is expected to fall below flood stage late 
  tonight and continue falling to 15.5 feet early Wednesday morning.
* Impact...At 16.5 feet, the Skokomish River will cause widespread 
  flooding of pasture lands, with water flowing quickly over West 
  Bourgault Road and Skokomish Valley Road.


&&

LAT...LON 4744 12326 4733 12321 4736 12317 4733 12308
      4721 12321 4738 12340

$$

WAC053-231430-
/O.EXT.KSEW.FL.W.0031.210223T0543Z-210223T1513Z/
/SPEW1.1.ER.210223T0543Z.210223T0600Z.210223T0613Z.NO/
829 PM PST Mon Feb 22 2021

...The Flood Warning is now in effect until tomorrow morning...

The Flood Warning continues for
  the South Prairie Creek at South Prairie.
* Until Tuesday morning.
* At 6:45 PM PST Monday the flow was 3650.0 cfs.
* Flood flow is 4000.0 cfs.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late 
  this evening to a crest of 4032.2 cfs late this evening, then fall 
  below flood stage late tonight.
* Impact...At 4000.0 cfs, South Prairie Creek will flood low lying 
  areas and roads from the Town of South Prairie downstream to the 
  Carbon River near Orting.


&&

LAT...LON 4708 12205 4707 12207 4706 12208 4706 12210
      4708 12209 4709 12205

$$

WAC033-231430-
/O.EXT.KSEW.FL.W.0029.210223T0746Z-210224T0751Z/
/CRNW1.1.ER.210223T0746Z.210223T1200Z.210223T1951Z.NO/
829 PM PST Mon Feb 22 2021

...The Flood Warning is now in effect until late tomorrow evening...

The Flood Warning continues for
  the Snoqualmie River Near Carnation.
* From this evening to Tuesday evening.
* At 7:15 PM PST Monday the stage was 52.1 feet.
* Flood stage is 54.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late 
  tonight to a crest of 55.0 feet. It will then fall below flood 
  stage early Tuesday.
* Impact...At 54.0 feet, the Snoqualmie River will flood much of the 
  farm land and several roads from Fall City downstream through 
  Carnation and Duvall.


&&

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

$$

Cullen
543 
WGUS86 KSEW 230606
FLSSEW

Flood Statement
National Weather Service Seattle WA
1006 PM PST Mon Feb 22 2021

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

  South Prairie Creek at South Prairie affecting Pierce County.

.The river crested below flood stage earlier this evening and 
continues to fall. .

WAC053-230715-
/O.CAN.KSEW.FL.W.0031.000000T0000Z-210223T0606Z/
/SPEW1.1.ER.210223T0543Z.210223T0600Z.210223T0613Z.NO/
1006 PM PST Mon Feb 22 2021

...The Flood Warning for the South Prairie Creek at South Prairie 
has been cancelled...

The Flood Warning is cancelled for
  the South Prairie Creek at South Prairie.
* At 8:45 PM PST Monday the flow was 3330.0 cfs.
* Forecast...The river crested at 3700 cfs earlier this evening and 
  has fallen to around 3300 cfs. The river is forecast to continue 
  to fall through the night.


&&

LAT...LON 4708 12205 4707 12207 4706 12208 4706 12210
      4708 12209 4709 12205

$$

Pullin

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 22, 8:14 PM PSTSmall Craft AdvisorySEW26 hr
Feb 23, 1:37 AM PSTRiver Flood WarningSEWThurston20 hr
Feb 23, 8:17 AM PSTFlood WatchSEWGrays Harbor, Thurston44 hr

Nearby

River Flood Warnings in Washington, 2021Every 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.