Sioux Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Flood Warning, Areal Flood Warning
Issued: 9:37 PM CDT Sep. 20, 2018 – National Weather Service

The Flood Warning continues for
the Burr Oak creek near Perkins.
* Until further notice.
* At 08 PM Thursday the stage was 18.14 feet.
* Flood stage is 16.00 feet.
* At stages near 18.0 feet... significant flooding of crop land
begins.


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




937 PM CDT Thu Sep 20 2018

... Flood Warning extended until Sunday September 23...
the Flood Warning continues for
the Rock River at Rock Valley.
* Until Sunday evening.
* At 08 PM Thursday the stage was 16.55 feet.
* Minor 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 18.7 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




937 PM CDT Thu Sep 20 2018

The Flood Warning continues for
the West Branch Floyd river near Struble.
* Until Saturday evening.
* At 08 PM Thursday the stage was 15.23 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
* Flood stage is 14.00 feet.
* Recent activity... the river rose above flood stage on Thursday
September 20.
* Forecast... the river will rise to 15.5 feet by Friday September 21.
* 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




937 PM CDT Thu Sep 20 2018

The Flood Warning continues for
the Big Sioux River above Hawarden.
* Until further notice.
* At 08 PM Thursday the stage was 24.34 feet.
* Moderate flooding is occurring and major flooding is forecast.
* Flood stage is 20.50 feet.
* Recent activity... the river rose above flood stage on Thursday
September 20.
* Forecast... the river will continue rising to near 29.2 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




937 PM CDT Thu Sep 20 2018

The Flood Warning continues for
the Big Sioux River near Canton.
* Until further notice.
* At 08 PM Thursday the stage was 1237.39 feet.
* Flood stage is 1235.00 feet.
* Recent activity... the river rose above flood stage on Thursday
September 20.
* 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




937 PM CDT Thu Sep 20 2018

The Flood Warning continues for
the Floyd river at Alton.
* Until Sunday morning.
* At 08 PM Thursday the stage was 21.96 feet.
* Record flooding is occurring and record flooding is forecast.
* Flood stage is 12.00 feet.
* Forecast... the river will rise to 22.5 feet by Friday September 21.


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




1239 PM CDT Thu Sep 20 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 Friday.

* At 1232 PM CDT, emergency management reported numerous County and
township roads across the area inundated with water. Some areas of
urban flooding also continue in low-lying and poor drainage areas.
This flooding is a result of widespread thunderstorms with heavy
rain from yesterday through early this morning, which dumped a
band of 3 to 6 inches of rainfall from southeast South Dakota
through northwest Iowa. Water levels should either peak or begin
to slowly recede this afternoon or early evening, but will have to
monitor for impacts from additional thunderstorms this afternoon
that have potential to produce locally more than an inch of
rainfall, especially east of Interstate 29.

* This replaces the earlier flash flood warnings for the 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.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.


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


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