Alert archive / Washington / River Flood Warnings in 2021
River Flood Warning 40, NWS Seattle, WA
NWS Seattle, WA issued this river flood warning at Oct 28, 2021, 5:23 PM PDT for King County, Washington. It took effect at Oct 28, 2021, 10:54 PM PDT. It was in force for 19 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 28, 2021, 5:23 PM PDT (00:23 UTC)
- In effect from
- Oct 28, 2021, 10:54 PM PDT
- Expired
- Oct 29, 2021, 6:14 PM PDT
- In force
- 19 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 00:25 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 14.60 ft at Oct 29, 2021, 3:00 AM PDT.
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.
292
WGUS46 KSEW 290023
FLWSEW
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Seattle WA
523 PM PDT Thu Oct 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.
.Rain will continue through tonight into Friday. Heavy rain will
drive the river above flood stage late tonight.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Caution is urged when walking near riverbanks.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.
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 late tonight at 115 AM PDT.
&&
WAC033-290830-
/O.NEW.KSEW.FL.W.0040.211029T0554Z-211030T0114Z/
/SQUW1.1.ER.211029T0554Z.211029T1200Z.211029T1613Z.NO/
523 PM PDT Thu Oct 28 2021
The National Weather Service in Seattle has issued a
* Flood Warning for
the Snoqualmie River Near Snoqualmie Falls.
* From this evening to tomorrow evening.
* At 3:30 PM PDT Thursday the flow was 11700.0 cfs.
* Flood flow is 20000.0 cfs.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this evening to a crest of 22500 cfs late tonight. It will then
fall below flood stage late tomorrow morning.
* Impact...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.
* Flood History...This crest compares to a previous crest of 22800.0
cfs on 12/10/1987.
&&
LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
4758 12178 4756 12170
$$
sborth4 follow-up statements
663
WGUS86 KSEW 290815
FLSSEW
Flood Statement
National Weather Service Seattle WA
115 AM PDT Fri Oct 29 2021
...The Flood Warning is extended for the following rivers in
Washington...
Snoqualmie River Near Snoqualmie Falls affecting King County.
.Heavy rain over the central Cascades will come to an end this
morning. Rainfall totals for the event will end up in the 3 to 4
inch range with locally higher totals. The Snoqualmie river near
Snoqualmie Falls will crest this morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov.
The next statement will be issued by this morning at 915 AM PDT.
&&
WAC033-291615-
/O.EXT.KSEW.FL.W.0040.000000T0000Z-211030T0501Z/
/SQUW1.1.ER.211029T0415Z.211029T1200Z.211029T2001Z.NO/
115 AM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until late this evening...
The Flood Warning continues for
the Snoqualmie River Near Snoqualmie Falls.
* Until late this evening.
* At 11:15 PM PDT Thursday the flow was 22300.0 cfs.
* Flood flow is 20000.0 cfs.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river flow in the 24 hours ending at
11:15 PM PDT Thursday was 22300.0 cfs.
* Forecast...The river is expected to crest near 27660 cfs this
morning. The river will begin receding later this morning and fall
below flood stage late this afternoon or this evening.
* Impact...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.
* Flood History...This crest compares to a previous crest of 27200.0
cfs on 01/19/1971.
&&
LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
4758 12178 4756 12170
$$
44267
WGUS86 KSEW 291548
FLSSEW
Flood Statement
National Weather Service Seattle WA
848 AM PDT Fri Oct 29 2021
...The Flood Warning continues for the following rivers in
Washington...
Snoqualmie River Near Snoqualmie Falls affecting King County.
.Heavy rain over the central Cascades has come to an end. The
Snoqualmie River near Snoqualmie Falls will continue to fall below
flood stage later today.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov.
The next statement will be issued by this afternoon at 445 PM PDT.
&&
WAC033-300000-
/O.EXT.KSEW.FL.W.0040.000000T0000Z-211030T0314Z/
/SQUW1.1.ER.211029T0415Z.211029T0945Z.211029T1814Z.NO/
848 AM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until this evening...
The Flood Warning continues for
the Snoqualmie River Near Snoqualmie Falls.
* Until this evening.
* At 8:15 AM PDT Friday the flow was 20400.0 cfs.
* Flood flow is 20000.0 cfs.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river flow in the 24 hours ending at
8:15 AM PDT Friday was 24400.0 cfs.
* Forecast...The river is expected to fall below flood stage late
this morning and continue falling.
* Impact...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.
* Flood History...This crest compares to a previous crest of 20400.0
cfs on 01/24/2015.
&&
LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
4758 12178 4756 12170
$$
JBB792
WGUS86 KSEW 291725
FLSSEW
Flood Statement
National Weather Service Seattle WA
1025 AM PDT Fri Oct 29 2021
...The Flood Warning is extended for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
...The Flood Warning is cancelled for the following rivers in
Washington...
Stillaguamish River At Arlington affecting Snohomish County.
Skykomish River Near Gold Bar affecting Snohomish County.
...The Flood Warning continues for the following rivers in
Washington...
Snoqualmie River Near Snoqualmie Falls affecting King County.
.Heavy rain has come to an end. Most rivers are receding.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov.
The next statement will be issued by this morning at 1130 AM PDT.
&&
WAC061-291830-
/O.CAN.KSEW.FL.W.0036.000000T0000Z-211029T1725Z/
/ARLW1.1.ER.211029T0226Z.211029T0655Z.211029T1246Z.NO/
1025 AM PDT Fri Oct 29 2021
...The Flood Warning for the Stillaguamish River At Arlington has
been cancelled...
The Flood Warning is cancelled for
the Stillaguamish River At Arlington.
* At 9:55 AM PDT Friday the stage was 11.8 feet.
* Flood stage is 14.0 feet.
* Recent Activity...The river crested around midnight at 16.3 feet.
* Forecast...The river is expected to fall to 2.9 feet early Monday
morning.
&&
LAT...LON 4816 12211 4817 12223 4816 12237 4826 12240
4823 12224 4824 12214
$$
WAC061-291830-
/O.CAN.KSEW.FL.W.0035.000000T0000Z-211029T1725Z/
/GLBW1.1.ER.211029T0019Z.211029T0445Z.211029T1247Z.NO/
1025 AM PDT Fri Oct 29 2021
...The Flood Warning for the Skykomish River Near Gold Bar has been
cancelled...
The Flood Warning is cancelled for
the Skykomish River Near Gold Bar.
* At 9:30 AM PDT Friday the stage was 14.1 feet.
* Flood stage is 15.0 feet.
* Recent Activity...The river crested at 16.9 feet around 10 PM
Thursday.
* Forecast...The river is expected to fall to 7.0 feet early Monday
morning.
&&
LAT...LON 4774 12150 4780 12173 4780 12196 4793 12197
4794 12169 4787 12147
$$
WAC033-300045-
/O.EXT.KSEW.FL.W.0040.000000T0000Z-211030T0035Z/
/SQUW1.1.ER.211029T0415Z.211029T0945Z.211029T1535Z.NO/
1025 AM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until late this afternoon...
The Flood Warning continues for
the Snoqualmie River Near Snoqualmie Falls.
* Until late this afternoon.
* At 9:15 AM PDT Friday the flow was 19100.0 cfs.
* Flood flow is 20000.0 cfs.
* No flooding is currently forecast.
* Forecast...The river has fallen below flood flow and will continue
to fall. Flooding downstream will continue until the flood wave
has completely passed out of the area.
* Impact...At 20000.0 cfs, the Snoqualmie River will cause
widespread flooding of pasture lands and roads along the river
from the town of Snoqualmie downstream through Fall City. Roads
that may become flooded include Fall City-Carnation...Tolt Hill...
and Novelty Flats Roads. This river level on the Snoqualmie
corresponds roughly to a phase 3 flood in the King County flood
system.
* Flood History...This crest compares to a previous crest of 19500.0
cfs on 10/26/2009.
&&
LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
4758 12178 4756 12170
$$
WAC045-300130-
/O.EXT.KSEW.FL.W.0033.000000T0000Z-211030T2133Z/
/SRPW1.2.ER.211025T1803Z.211029T0545Z.211030T1233Z.NO/
1025 AM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until early tomorrow
afternoon...
The Flood Warning continues for
the Skokomish River At Potlatch.
* Until early tomorrow afternoon.
* At 10:00 AM PDT Friday the stage was 17.1 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 10:00 AM PDT Friday was 17.6 feet.
* Forecast...The river is expected to fall below flood stage late
tonight and continue falling.
* 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.
* Flood History...This crest compares to a previous crest of 17.1
feet on 12/13/1998.
&&
LAT...LON 4744 12326 4733 12321 4736 12317 4733 12308
4721 12321 4738 12340
$$
JBB595
WGUS86 KSEW 292236
FLSSEW
Flood Statement
National Weather Service Seattle WA
336 PM PDT Fri Oct 29 2021
...The Flood Warning is extended for the following rivers in
Washington...
Snohomish River At Snohomish affecting Snohomish County.
Snoqualmie River Near Carnation affecting King County.
...The Flood Warning is cancelled for the following rivers in
Washington...
Skagit River Near Concrete affecting Skagit County.
Snohomish River Near Monroe affecting Snohomish County.
Snoqualmie River Near Snoqualmie Falls affecting King County.
...The Flood Warning continues for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
Skagit River Near Mt. Vernon affecting Skagit County.
.Heavy rain has come to an end. Most rivers are receding, and the
flood warning has ended for the Skagit River at Concrete, Snoqualmie
River near Snoqualmie Falls, and the Snohomish River at Monroe.
Downstream on those rivers the flood warnings remain. The Skagit
River near Mt. Vernon, Snoqualmie River near Carnation, and the
Snohomish River at Snohomish are still rising.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Caution is urged when walking near riverbanks.
To escape rising water, take the shortest path to higher ground.
Additional information is available at www.weather.gov.
The next statement will be issued by this afternoon at 430 PM PDT.
&&
WAC061-292345-
/O.CAN.KSEW.FL.W.0044.000000T0000Z-211029T2236Z/
/MROW1.1.ER.211029T1452Z.211029T1530Z.211029T1545Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning for the Snohomish River Near Monroe has been
cancelled...
The Flood Warning is cancelled for
the Snohomish River Near Monroe.
* At 2:15 PM PDT Friday the stage was 14.3 feet.
* Flood stage is 15.0 feet.
* Forecast...The river fell below flood stage and will continue to
fall. The flood wave, however, is still moving down toward
Snohomish where flooding continues.
&&
LAT...LON 4780 12190 4779 12212 4786 12217 4791 12203
4793 12202 4793 12190
$$
WAC033-292345-
/O.CAN.KSEW.FL.W.0040.000000T0000Z-211029T2236Z/
/SQUW1.1.ER.211029T0415Z.211029T0945Z.211029T1535Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning for the Snoqualmie River Near Snoqualmie Falls
has been cancelled...
The Flood Warning is cancelled for
the Snoqualmie River Near Snoqualmie Falls.
* At 1:30 PM PDT Friday the flow was 15500.0 cfs.
* Flood flow is 20000.0 cfs.
* Forecast...The river fell below flood stage and will continue to
fall. The flood wave, however, is still moving down toward
Carnation where flooding continues.
&&
LAT...LON 4742 12175 4752 12186 4756 12196 4761 12188
4758 12178 4756 12170
$$
WAC057-292345-
/O.CAN.KSEW.FL.W.0039.000000T0000Z-211029T2236Z/
/CONW1.2.ER.211029T0517Z.211029T1200Z.211029T1915Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning for the Skagit River Near Concrete has been
cancelled...
The Flood Warning is cancelled for
the Skagit River Near Concrete.
* At 2:45 PM PDT Friday the stage was 26.4 feet.
* Flood stage is 28.0 feet.
* Forecast...The river fell below flood stage and will continue to
fall. The flood wave, however, is still moving down toward Mount
Vernon where flooding continues.
&&
LAT...LON 4845 12163 4848 12185 4846 12227 4853 12227
4856 12185 4850 12160
$$
WAC057-300645-
/O.EXT.KSEW.FL.W.0046.000000T0000Z-211030T2244Z/
/MVEW1.1.ER.211029T1825Z.211030T0600Z.211030T1044Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until tomorrow afternoon...
The Flood Warning continues for
the Skagit River Near Mt. Vernon.
* Until tomorrow afternoon.
* At 2:30 PM PDT Friday the stage was 28.6 feet.
* Flood stage is 28.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 2:30 PM PDT Friday was 28.6 feet.
* Forecast...The river is expected to rise to a crest of 29.7 feet
late this evening. It will then fall below flood stage late
tonight.
* Impact...At 28.0 feet, the Skagit River will cause minor flooding
from Sedro Woolley downstream through Mount Vernon to the mouth...
with shallow flooding in low pasture lands and over a few
low-lying roads near the river. This level for this location on
the Skagit corresponds to a Phase 3 flood in the Skagit County
flood system.
* Flood History...This crest compares to a previous crest of 29.6
feet on 01/16/1974.
&&
LAT...LON 4846 12227 4840 12230 4830 12235 4837 12250
4845 12240 4853 12227
$$
WAC061-300645-
/O.EXT.KSEW.FL.W.0045.000000T0000Z-211030T2120Z/
/SNAW1.1.ER.211029T1726Z.211030T0200Z.211030T0620Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until early tomorrow
afternoon...
The Flood Warning continues for
the Snohomish River At Snohomish.
* Until early tomorrow afternoon.
* At 2:00 PM PDT Friday the stage was 25.6 feet.
* Flood stage is 25.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 2:00 PM PDT Friday was 25.6 feet.
* Forecast...The river will slowly crest above flood stage with a
maximum value of 25.8 feet this evening. It will fall below flood
stage late this evening.
* Impact...At 25.0 feet, the Snohomish River will cause minor
flooding of lowlands not protected by levees and on the Old
Snohomish-Monroe highway. A stage of 25 feet on the Snohomish
River corresponds to a Phase 2 in the Snohomish County flood
program.
* Flood History...This crest compares to a previous crest of 25.7
feet on 11/13/1999.
&&
LAT...LON 4786 12217 4789 12221 4796 12232 4809 12216
4794 12213 4791 12203
$$
WAC033-300645-
/O.EXT.KSEW.FL.W.0041.000000T0000Z-211030T1708Z/
/CRNW1.1.ER.211029T1048Z.211030T0000Z.211030T0508Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until late tomorrow morning...
The Flood Warning continues for
the Snoqualmie River Near Carnation.
* Until late tomorrow morning.
* At 2:45 PM PDT Friday the stage was 55.2 feet.
* Flood stage is 54.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 2:45 PM PDT Friday was 55.2 feet.
* Forecast...The river is cresting now at around 55.3 feet and
expected to fall below flood stage late this evening and continue
to fall.
* 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.
* Flood History...This crest compares to a previous crest of 55.3
feet on 11/04/1971.
&&
LAT...LON 4756 12196 4770 12204 4784 12202 4783 12194
4771 12193 4761 12188
$$
WAC045-300645-
/O.EXT.KSEW.FL.W.0033.000000T0000Z-211030T1635Z/
/SRPW1.2.ER.211025T1803Z.211029T0545Z.211030T0735Z.NO/
336 PM PDT Fri Oct 29 2021
...The Flood Warning is now in effect until late tomorrow morning...
The Flood Warning continues for
the Skokomish River At Potlatch.
* Until late tomorrow morning.
* At 2:45 PM PDT Friday the stage was 16.9 feet.
* Flood stage is 16.5 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 2:45 PM PDT Friday was 17.5 feet.
* Forecast...The river has crested is expected to fall below flood
stage just after midnight tonight and continue falling.
* Impact...At 16.5 feet, the Skokomish River will cause widespread
flooding of pasture lands, with water flowing quickly over West
Bourgault Road and Skokomish Valley Road.
* Flood History...This crest compares to a previous crest of 16.8
feet on 11/23/1990.
&&
LAT...LON 4744 12326 4733 12321 4736 12317 4733 12308
4721 12321 4738 12340
$$
JBBThe office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 5:46 PM PDT | Areal Flood Advisory | SEW | Skagit, Snohomish, Whatcom | 12 hr |
| Oct 28, 5:48 PM PDT | Areal Flood Advisory | SEW | Clallam, Grays Harbor, Jefferson, Kitsap, Mason | 11 hr |
| Oct 28, 5:53 PM PDT | Areal Flood Advisory | SEW | King, Lewis, Pierce, Thurston | 15 hr |
| Oct 28, 5:56 PM PDT | Areal Flood Advisory | SEW | San Juan | 11 hr |
| Oct 28, 5:57 PM PDT | Areal Flood Advisory | SEW | Island | 12 hr |
| Oct 28, 8:12 PM PDT | River Flood Warning | SEW | King | 33 hr |
| Oct 28, 8:12 PM PDT | River Flood Warning | SEW | Snohomish | 8 hr |
| Oct 29, 12:14 AM PDT | River Flood Warning | SEW | Whatcom | 8 hr |
| Oct 29, 2:07 AM PDT | River Flood Warning | SEW | Snohomish | 24 hr |
| Oct 29, 4:27 AM PDT | River Flood Warning | SEW | Snohomish | 18 hr |
| Oct 29, 5:08 AM PDT | River Flood Warning | SEW | Skagit | 24 hr |
| Oct 29, 2:56 PM PDT | Small Craft Advisory | SEW | 3 days |
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.