Alert archive / South Dakota / River Flood Warnings in 2021

River Flood Warning 1, NWS Sioux Falls, SD

August 28, 2021Lincoln County, Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this river flood warning at Aug 28, 2021, 11:46 PM CDT for Lincoln County, Minnehaha County, South Dakota. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Aug 28, 2021, 11:46 PM CDT (04:46 UTC)
Expired: Aug 29, 2021, 7:44 AM CDT
In force: 8 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Lincoln County, SD, Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 6 km from the middle of the area, began a volume at 04:46 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 Big Sioux River at Sioux Falls Western Avenue (WAVS2). The gauge peaked at 8.77 ft at Aug 28, 2021, 11:00 PM CDT.

Action stage: 6.5 ft
Minor stage: 8 ft
Moderate stage: 12 ft
Major stage: 15.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06482000, 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.

022 
WGUS43 KFSD 290446
FLWFSD

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Sioux Falls SD
1146 PM CDT Sat Aug 28 2021

...The National Weather Service in Sioux Falls SD has issued a Flood 
Warning for the following rivers in South Dakota...

  Big Sioux River at Sioux Falls Western Avenue affecting Lincoln 
  and Minnehaha Counties.

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 late Sunday morning at 1100 AM CDT.

&&


SDC083-099-300700-
/O.NEW.KFSD.FL.W.0001.210829T0446Z-000000T0000Z/
/WAVS2.1.ER.210829T0325Z.210829T0400Z.000000T0000Z.NO/
1146 PM CDT Sat Aug 28 2021

The National Weather Service in Sioux Falls has issued a

* Flood Warning for
  the Big Sioux River at Sioux Falls Western Avenue.
* From this evening until further notice.
* At 11:00 PM CDT Saturday the stage was 8.8 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 11:00 PM CDT Saturday was 8.8 feet.
* Forecast...No forecast is available for this location.
* Impact...At 8.0 feet, flooding beings to affect Spencer Dog Park 
  and the lower portions of Tuthill Park in southern Sioux Falls.

&&


                          Fld   Observed            
Location                  Stg   Stg   Day/Time                

Big Sioux River
Sioux Falls Western Ave   8.0   8.8   Sat 11 PM           





&&

LAT...LON 4353 9678 4353 9676 4351 9675 4353 9671
      4354 9673 4356 9673 4357 9672 4355 9672
      4353 9669 4351 9670 4350 9674 4350 9676

$$

Schumacher

1 follow-up statement

969 
WGUS83 KFSD 291244
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
744 AM CDT Sun Aug 29 2021

...The Flood Warning is cancelled for the following rivers in South 
Dakota...

  Big Sioux River at Sioux Falls Western Avenue affecting Lincoln 
  and Minnehaha Counties.

SDC083-099-291345-
/O.CAN.KFSD.FL.W.0001.000000T0000Z-210829T1244Z/
/WAVS2.1.ER.210829T0325Z.210829T0430Z.210829T0604Z.NO/
744 AM CDT Sun Aug 29 2021

...The Flood Warning for the Big Sioux River at Sioux Falls Western 
Avenue has been cancelled...

The Flood Warning is cancelled for
  the Big Sioux River at Sioux Falls Western Avenue.
* At 7:00 AM CDT Sunday the stage was 3.7 feet.
* Flood stage is 8.0 feet.
* Forecast...No forecast is available for this location.

&&


  Fld   Observed           Forecasts (unknown time)
Location                  Stg   Stg   Day/Time     d1    d2    d3

Big Sioux River
Sioux Falls Western Avenu 8.0   3.7   Sun 7 AM CDT MSG   MSG   MSG





&&

LAT...LON 4353 9678 4353 9676 4351 9675 4353 9671
      4354 9673 4356 9673 4357 9672 4355 9672
      4353 9669 4351 9670 4350 9674 4350 9676

$$

APT

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 28, 7:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lincoln	52 min
Aug 28, 7:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Hanson, Lake, McCook, Miner, Minnehaha, Moody	50 min
Aug 28, 7:27 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Turner, Yankton	48 min
Aug 28, 7:48 PM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Minnehaha, Moody, Turner	31 min
Aug 28, 7:50 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Clay, Hutchinson, Lincoln, Turner, Yankton	40 min
Aug 28, 8:52 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	23 min
Aug 28, 9:13 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	47 min
Aug 28, 9:20 PM CDT	Flash Flood Warning	FSD	Lincoln, Minnehaha	85 min
Aug 28, 9:29 PM CDT	Flash Flood Warning	FSD	Lincoln, Minnehaha	3 hr
Aug 28, 10:36 PM CDT	Flash Flood Warning	FSD	Lincoln, Minnehaha	114 min
Aug 29, 7:44 AM CDT	River Flood Warning	FSD	Lincoln	15 hr

Nearby

River Flood Warnings in South Dakota, 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.