Flash Flood Warning 14, NWS Sioux Falls, SD

Issued

Jun 20, 2011, 9:59 PM CDT (02:59 UTC)

Expired

Jun 21, 2011, 1:00 AM CDT

In force

3 hr

Issued by

NWS Sioux Falls, SD

Area

Storm-based polygon

Flood severity

None

Counties Aurora County, SD, Brule County, SD, Charles Mix County, SD, Douglas County, SD, Gregory County, SD, Jerauld County, SD

The Sioux Falls radar (KFSD), 162 km from the middle of the area, began a volume at 03:02 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

333 
WGUS53 KFSD 210259
FFWFSD
SDC003-015-023-043-053-073-210600-
/O.NEW.KFSD.FF.W.0014.110621T0259Z-110621T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
959 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AURORA COUNTY IN SOUTH CENTRAL SOUTH DAKOTA
  CENTRAL GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA
  EASTERN BRULE COUNTY IN SOUTH CENTRAL SOUTH DAKOTA
  JERAULD COUNTY IN CENTRAL SOUTH DAKOTA
  NORTHWESTERN CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA
  NORTHWESTERN DOUGLAS COUNTY IN SOUTH CENTRAL SOUTH DAKOTA

* UNTIL 100 AM CDT

* AT 953 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH MODERATE TO HEAVY RAINFALL ACROSS THE WARNED   
  AREA. IN THE WARNED AREA...DOPPLER RADAR HAS ESTIMATED A 
  WIDEPSREAD 2 TO 4 INCHES OF RAINFALL WHICH HAS ALREADY FALLEN THIS 
  EVENING. RAINFALL RATES HAVE ACTUALLY DECREASED SOME SINCE EARLIER 
  THIS EVENING...BUT THE GROUND IS BECOMING SATURATED IN THE WARNED 
  AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  KIMBALL...PLANKINTON...ALPENA...GRASS RANCH COLONY...LANE...
  PLATTE...WESSINGTON SPRINGS AND WHITE LAKE.

RAINFALL AMOUNTS INCLUDE 8 INCHES OF BURKE IN GREGORY COUNTY. IN 
ADDITION...WATER HAS BEEN REPORTED OVER THE ROAD ON HIGHWAYS 50 AND 
44 IN NORTHERN CHARLES MIX COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

&&

LAT...LON 4419 9874 4420 9833 4409 9833 4328 9862
      4327 9914 4359 9915

$$

MJF

890 
WGUS73 KFSD 210500
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1200 AM CDT TUE JUN 21 2011

SDC003-015-023-043-053-073-210600-
/O.CON.KFSD.FF.W.0014.000000T0000Z-110621T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JERAULD SD-GREGORY SD-DOUGLAS SD-CHARLES MIX SD-BRULE SD-AURORA SD-
1200 AM CDT TUE JUN 21 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR AURORA...EASTERN
BRULE...NORTHWESTERN CHARLES MIX...NORTHWESTERN DOUGLAS...CENTRAL
GREGORY AND JERAULD COUNTIES UNTIL 100 AM CDT...

AT 1148 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
RAINFALL CONTINUING ACROSS THE WARNED AREA. DOPPLER RADAR ESTIMATED 
A WIDEPSREAD 2 TO 4 INCHES OF RAINFALL IN THIS AREA...WITH LOCALIZED 
5 TO 6 INCH AMOUNTS. 

DUE TO THE RAINFALL THAT HAS ALREADY OCCURRED...AND ANTICIPATED 
FUTURE RAINFALL LATER TONIGHT AND EARLY TUESDAY...THIS AREA IS ALSO 
UNDER AN AREAL FLOOD WARNING THROUGH TUESDAY MORNING. EXCESS RUNOFF 
FROM RAIN WILL GREATLY IMPACT LOW LYING AND POOR DRAINAGE AREAS...AS 
WELL AS STREAMS AND TRIBUTARIES. DEPENDING ON HOW MUCH ADDITIONAL 
RAINFALL OCCURS TONIGHT...IT COULD TAKE HOURS FOR THE EXCESS RUNOFF 
TO SUBSIDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4419 9874 4420 9833 4409 9833 4328 9862
      4327 9914 4359 9915

$$
MJF

Flash Flood Warnings in South Dakota, 2011Every flash flood warning in 2011

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