Alert archive / Iowa / River Flood Warnings in 2016

River Flood Warning 39, NWS Sioux Falls, SD

June 18, 2016Monona County, Woodbury County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Jun 18, 2016, 9:26 AM CDT for Monona County, Woodbury County, Iowa. It took effect at Jun 18, 2016, 11:20 AM CDT. It was in force for 27 hr.

The area

The outline as issued.

The facts

Issued: Jun 18, 2016, 9:26 AM CDT (14:26 UTC)
In effect from: Jun 18, 2016, 11:20 AM CDT
Expired: Jun 19, 2016, 2:05 PM CDT
In force: 27 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Monona County, IA, Woodbury County, IA

The radar

The Omaha radar (KOAX), 109 km from the middle of the area, began a volume at 14:31 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 West Fork Ditch near Hornick (HOKI4). The gauge peaked at 21.73 ft at Jun 18, 2016, 12:00 PM CDT.

Action stage: 18 ft
Minor stage: 20 ft
Moderate stage: 22 ft
Major stage: 26.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06602020, 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.

579
WGUS43 KFSD 181426
FLWFSD
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
926 AM CDT SAT JUN 18 2016

...The National Weather Service in Sioux Falls has issued a flood
warning for the following rivers in Iowa...

West Fork Ditch Near Hornick

.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest
forecasts.

Heavy rains yesterday evening have caused the West Fork Ditch to approach flood stage at Hornick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water
depth and road condition may be unsafe.

Additional information is available at

http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

IAC133-193-191826-
/O.NEW.KFSD.FL.W.0039.160618T1620Z-160619T1905Z/
/HOKI4.1.ER.160618T1620Z.160618T1800Z.160618T1905Z.NO/
926 AM CDT SAT JUN 18 2016

The National Weather Service in Sioux Falls has issued a

* Flood Warning for
The West Fork Ditch Near Hornick.
* until Sunday afternoon.
* At 09AM Saturday the stage was 19.7 feet.
* Minor flooding is forecast.
* Flood stage is 20.0 feet.
* At stages near 20.0 feet...Large areas of agricultural land will
flood if the levees fail.

LAT...LON 4234 9613 4234 9607 4227 9606 4221 9609
4221 9614 4227 9611

&&
LOCATION FLOOD LATEST OBSERVED MAXIMUM FORECAST RECENT OBSERVED
STAGE STAGE TIME STAGE TIME CREST TIME

LITTLE SIOUX RIVER
HOKI4 20.0 19.72 Sat 9 AM 20.2 Sat 1 PM 19.7 Sat Jun 18

2 follow-up statements

580 
WGUS43 KFSD 181629
FLWFSD
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1129 AM CDT SAT JUN 18 2016

...Forecast flooding changed from Minor to Moderate severity for the 
following rivers in Iowa...
  West Fork Ditch Near Hornick
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC133-193-192029-
/O.EXT.KFSD.FL.W.0039.000000T0000Z-160620T0837Z/
/HOKI4.2.ER.160618T1415Z.160618T1800Z.160619T0837Z.NO/
1129 AM CDT SAT JUN 18 2016

...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for 
 The West Fork Ditch Near Hornick.
* until late Sunday night.
* At 11AM Saturday the stage was 21.4 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Flood stage is 20.0 feet.
* At stages near 22.0 feet...All agricultural land immediately 
adjacent to the ditch will be flooded and the communities of Hornick 
and Holly Springs will have flood problems if the levees fail. 

&&
 
LAT...LON 4234 9613 4234 9607 4227 9606 4221 9609
          4221 9614 4227 9611

$$

&& 
LOCATION FLOOD  LATEST OBSERVED  MAXIMUM FORECAST
         STAGE  STAGE  TIME      STAGE  TIME

LITTLE SIOUX RIVER
HOKI4    20.0   21.41 Sat 11 AM   22.4  Sat 1 PM

544 
WGUS83 KFSD 190128
FLSFSD
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
828 PM CDT SAT JUN 18 2016

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

  West Fork Ditch Near Hornick
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
River levels have quickly fallen on the West Fork Ditch nean Hornick
resulting in the flood warning being cancelled.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

This will be the last statement issued.

&&

IAC133-193-190158-
/O.CAN.KFSD.FL.W.0039.000000T0000Z-160620T0837Z/
/HOKI4.1.ER.160618T1415Z.160618T1745Z.160618T2121Z.NO/
828 PM CDT SAT JUN 18 2016

The Flood Warning is cancelled for
  The West Fork Ditch Near Hornick.
* At 08PM Saturday the stage was 16.5 feet.
* Flood stage is 20.0 feet.
* Recent activity...The river rose above flood stage on Saturday June
  18.
* Recent activity...The river fell below flood stage at Saturday June
  18.
* Forecast...The river will continue to fall to 15.8 feet by 7 AM 
  Monday.

&&
 
LAT...LON 4234 9613 4234 9607 4227 9606 4221 9609
          4221 9614 4227 9611

$$

&& 
LOCATION FLOOD  LATEST OBSERVED  RECENT OBSERVED
         STAGE  STAGE  TIME      CREST TIME

LITTLE SIOUX RIVER
HOKI4    20.0   16.46 Sat 8 PM   21.9  Sat Jun 18

ADAMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 8:18 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 2 more	42 min
Jun 17, 8:44 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	46 min
Jun 17, 9:44 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	46 min
Jun 17, 9:53 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	52 min
Jun 17, 10:14 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	46 min
Jun 17, 10:41 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	49 min
Jun 17, 10:57 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	37 min
Jun 17, 11:33 PM CDT	Flash Flood Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	6 hr
Jun 18, 3:14 AM CDT	Heat Advisory	FSD	Lyon, Plymouth, Sioux, Woodbury	41 hr
Jun 18, 3:19 AM CDT	River Flood Warning	FSD	Woodbury	24 hr
Jun 18, 8:15 AM CDT	River Flood Warning	FSD	Clay, Dickinson	62 hr
Jun 18, 9:57 AM CDT	River Flood Warning	FSD	Clay, Dickinson	54 hr

Nearby

River Flood Warnings in Iowa, 2016 Every river flood warning in 2016

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.