Flash Flood Warning 6, NWS Sioux Falls, SD

Issued

Jun 1, 2014, 11:33 AM CDT (16:33 UTC)

Expired

Jun 1, 2014, 2:30 PM CDT

In force

3 hr

Issued by

NWS Sioux Falls, SD

Area

Storm-based polygon

Flood severity

None

Counties Clay County, IA, Dickinson County, IA, O'Brien County, IA

The Sioux Falls radar (KFSD), 124 km from the middle of the area, began a volume at 16:35 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.

746 
WGUS53 KFSD 011633
FFWFSD
IAC041-059-141-011930-
/O.NEW.KFSD.FF.W.0006.140601T1633Z-140601T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1133 AM CDT SUN JUN 1 2014

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN O'BRIEN COUNTY IN NORTHWEST IOWA
  NORTHERN CLAY COUNTY IN NORTHWEST IOWA
  SOUTHERN DICKINSON COUNTY IN NORTHWEST IOWA

* UNTIL 230 PM CDT

* AT 1128 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR  
  INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED 
  AREA. DOPPLER RADAR IS ESTIMATING 1 TO 2 INCH RAIN AMOUNTS PER 
  HOUR IN THE AREA. THE THUNDERSTORMS CONTINUE TO REDEVELOP OVER THE 
  SAME LOCATION...MEANING THAT AN ADDITIONAL 1 TO 2 INCHES IS 
  POSSIBLE GIVING A TOTAL OF 2 TO 4 INCHES OF RAIN THROUGH MIDDAY.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. AREAS ESPECIALLY PRONE TO FLOODING WILL BE LOW LYING 
  LOCATIONS AND AREAS WITH POOR DRAINAGE. SOME LOCATIONS THAT WILL 
  EXPERIENCE FLOODING INCLUDE...SPENCER...EVERLY...FOSTORIA... 
  HARTLEY...MILFORD...PRIMGHAR AND TERRIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL COULD CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF SMALL CREEKS OR STREAMS...AND 
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4317 9492 4297 9564 4320 9564 4326 9545
      4326 9539 4328 9539 4342 9492

$$

MJF

931 
WGUS73 KFSD 011856
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
156 PM CDT SUN JUN 1 2014

IAC041-059-141-011930-
/O.CON.KFSD.FF.W.0006.000000T0000Z-140601T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
O'BRIEN IA-DICKINSON IA-CLAY IA-
156 PM CDT SUN JUN 1 2014

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN CLAY...SOUTHERN
DICKINSON AND EASTERN O'BRIEN COUNTIES UNTIL 230 PM CDT...

AT 152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL JUST SOUTH OF THE WARNED 
AREA. THE WARNED AREA HAS AT LEAST TEMPORARILY QUIT RAINING...BUT 
MORE STORMS COULD LIKELY MOVE IN FROM THE SOUTH. IF THIS 
HAPPENS...THESE STORMS ARE PRODUCING VERY HEAVY RAINFALL OF AT LEAST 
2 INCHES PER HOUR. 

RUNOFF FROM EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. 
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...SPENCER... 
EVERLY... FOSTORIA...HARTLEY...MILFORD...PRIMGHAR AND TERRIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.

&&

LAT...LON 4317 9492 4297 9564 4320 9564 4326 9545
      4326 9539 4328 9539 4342 9492

$$

761 
WGUS73 KFSD 011926
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
226 PM CDT SUN JUN 1 2014

IAC041-059-141-011940-
/O.EXP.KFSD.FF.W.0006.000000T0000Z-140601T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
O'BRIEN IA-DICKINSON IA-CLAY IA-
226 PM CDT SUN JUN 1 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN CLAY...
SOUTHERN DICKINSON AND EASTERN O'BRIEN COUNTIES WILL BE ALLOWED TO
EXPIRE AT 230 PM CDT...

EXCESS RUNOFF FROM HEAVY RAIN IS DIMINISHING OVER THE AREA. BE 
ADVISED THAT STRONG STORMS WITH HEAVY RAIN EXISTS JUST TO THE SOUTH 
ROUGHLY FROM LE MARS IOWA TO SIOUX RAPIDS IOWA AS OF 225 PM. IF 
THESE STORMS MOVE NORTHWARD...FLASH FLOODING COULD ONCE AGAIN BE A 
THREAT. 

LAT...LON 4317 9492 4297 9564 4320 9564 4326 9545
      4326 9539 4328 9539 4342 9492

$$

MJF

Flash Flood Warnings in Iowa, 2014Every flash flood warning in 2014

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.