Sioux Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Flood Warning, Areal Flood Warning
Issued: 5:30 AM CDT Sep. 21, 2018 – National Weather Service

... Observed flooding increased from moderate to record severity...
... Forecast flooding increased from moderate to record severity...
the Flood Warning continues for
the West Branch Floyd river near Struble.
* Until Saturday evening.
* At 04am Friday the stage was 15.90 feet.
* Record flooding is occurring and record flooding is forecast.
* Flood stage is 14.00 feet.
* Forecast... the river will rise to 16.2 feet by 7 am Friday.
* At stages near 16.0 feet... County roads begin to flood.


Lat... Lon 4296 9622 4296 9616 4285 9617 4274 9622
           4274 9626 4286 9622




243 am CDT Fri Sep 21 2018

The Flood Warning continues for
the Burr Oak creek near Perkins.
* Until further notice.
* At 02am Friday the stage was 16.71 feet.
* Flood stage is 16.00 feet.
* At stages near 16.0 feet... flooding of lower lying crop and pasture
land begins.


Lat... Lon 4325 9625 4326 9618 4324 9614 4322 9616
          4324 9618 4324 9625




243 am CDT Fri Sep 21 2018

The Flood Warning continues for
the Rock River at Rock Valley.
* Until Sunday evening.
* At 02am Friday the stage was 17.30 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
* Flood stage is 16.00 feet.
* Recent activity... the river rose above flood stage on Thursday
September 20.
* Forecast... the river will rise to 18.5 feet by Friday September 21.
* At stages near 19.0 feet... Rock Valley begins to experience flood
problems and sandbagging of storm sewers in the city begins.


Lat... Lon 4334 9625 4331 9618 4312 9636 4303 9647
          4314 9644 4325 9639




243 am CDT Fri Sep 21 2018

The Flood Warning continues for
the Big Sioux River above Hawarden.
* Until further notice.
* At 01am Friday the stage was 26.24 feet.
* Moderate flooding is occurring and major flooding is forecast.
* Flood stage is 20.50 feet.
* Forecast... the river will continue rising to near 29.7 feet by
Sunday September 23. Additional rises may be possible thereafter.
* At stages near 30.5 feet... Iowa Highway 10 begins to flood.


Lat... Lon 4308 9654 4308 9641 4302 9646 4291 9649
          4291 9658




243 am CDT Fri Sep 21 2018

The Flood Warning continues for
the Big Sioux River near Canton.
* Until further notice.
* At 02am Friday the stage was 1238.48 feet.
* Flood stage is 1235.00 feet.
* At stages near 1238 feet... nearly all crop and pasture land in the
1/2 mile wide flood plain will be inundated.


Lat... Lon 4339 9658 4338 9648 4327 9648 4327 9652
          4324 9652 4320 9652 4321 9661
          4332 9660 4331 9656




243 am CDT Fri Sep 21 2018

The Flood Warning continues for
the Floyd river at Alton.
* Until late Saturday night.
* At 02am Friday the stage was 20.59 feet.
* Record flooding is occurring and record flooding is forecast.
* Flood stage is 12.00 feet.
* Forecast... the river will rise to 21.3 feet by Friday September 21.


Lat... Lon 4307 9596 4307 9589 4299 9598 4291 9603
          4291 9610 4300 9603




1231 am CDT Fri Sep 21 2018

The National Weather Service in Sioux Falls has issued a

* Flood Warning for...
southwestern Lyon County in northwestern Iowa...
Sioux County in northwestern Iowa...
Clay County in northwestern Iowa...
O'Brien County in northwestern Iowa...
northern Clay County in southeastern South Dakota...
Lincoln County in southeastern South Dakota...
Yankton County in southeastern South Dakota...
Turner County in southeastern South Dakota...
northern Union County in southeastern South Dakota...
Hutchinson County in southeastern South Dakota...

* until 1230 am CDT Saturday.

* At 1229 am CDT, emergency management continued to report Road and
field flooding across the warned area.

* Some locations that will experience flooding include...
Yankton, Spencer in Clay County, Sioux Center, Orange City,
Sheldon, Canton, Hawarden, Beresford, Parker, Harrisburg, Tea, Rock
Valley, Hull, Lennox, Hartley, Sanborn, Freeman, Alton, Paullina
and Primghar.

Precautionary/preparedness actions...

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.


Lat... Lon 4292 9495 4291 9764 4317 9764 4317 9787
      4350 9787 4347 9680 4325 9585 4322 9494
      4312 9492


Kalin