Flash Flood Warning 24, NWS Sioux Falls, SD

Issued

Jul 11, 2011, 1:19 AM CDT (06:19 UTC)

Expired

Jul 11, 2011, 5:30 AM CDT

In force

4 hr

Issued by

NWS Sioux Falls, SD

Area

Storm-based polygon

Flood severity

None

Counties Dickinson County, IA, Osceola County, IA, Jackson County, MN, Nobles County, MN

The Sioux Falls radar (KFSD), 133 km from the middle of the area, began a volume at 06:20 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.

007 
WGUS53 KFSD 110619
FFWFSD
IAC059-143-MNC063-105-111030-
/O.NEW.KFSD.FF.W.0024.110711T0619Z-110711T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
119 AM CDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DICKINSON COUNTY IN NORTHWEST IOWA
  EASTERN OSCEOLA COUNTY IN NORTHWEST IOWA
  SOUTHEASTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA
  SOUTHERN JACKSON COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 530 AM CDT

* AT 115 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 
RAINFALL RATES OF TWO TO THREE INCHES OF RAINFALL CAN BE 
EXPECTED...WITH RAINFALL AMOUNTS OF TWO TO FOUR INCHES ACROSS THE 
WARNED AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JACKSON...SPIRIT LAKE...ARNOLDS PARK...BREWSTER...HARRIS...LAKE
  PARK...LAKEFIELD...MILFORD...OCHEYEDAN...OKOBOJI...ORLEANS...ROUND
  LAKE...SUPERIOR...TERRIL...WAHPETON AND WEST OKOBOJI.

AT 115 AM...EMERGENCY MANAGERS REPORTED STREET FLOODING IN LAKE 
PARK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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

&&

LAT...LON 4350 9489 4349 9490 4325 9491 4326 9557
      4371 9559 4372 9487

$$

BT

284 
WGUS73 KFSD 110732
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
232 AM CDT MON JUL 11 2011

IAC059-143-MNC063-105-111030-
/O.CON.KFSD.FF.W.0024.000000T0000Z-110711T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OSCEOLA IA-DICKINSON IA-JACKSON MN-NOBLES MN-
232 AM CDT MON JUL 11 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN NOBLES...
SOUTHERN JACKSON...DICKINSON AND EASTERN OSCEOLA COUNTIES UNTIL 530
AM CDT...

AT 229 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE MOVING NORTHEAST BACK 
INTO THE WARMED AREA. ADDITIONAL RAINFALL NEAR ONE INCH WILL BE 
POSSIBLE WITH THSE STORMS.

SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
INCLUDE...JACKSON...SPIRIT LAKE...ARNOLDS PARK...BREWSTER...HARRIS...
LAKE PARK...LAKEFIELD...MILFORD...OCHEYEDAN...OKOBOJI...ORLEANS...
ROUND LAKE...SUPERIOR...TERRIL...WAHPETON AND WEST OKOBOJI.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE MINOR FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 4350 9489 4349 9490 4325 9491 4326 9557
      4371 9559 4372 9487

$$

CJ

942 
WGUS73 KFSD 111025
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
525 AM CDT MON JUL 11 2011

IAC059-143-MNC063-105-111038-
/O.EXP.KFSD.FF.W.0024.000000T0000Z-110711T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OSCEOLA IA-DICKINSON IA-JACKSON MN-NOBLES MN-
525 AM CDT MON JUL 11 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
NOBLES...SOUTHERN JACKSON...DICKINSON AND EASTERN OSCEOLA COUNTIES
WILL BE ALLOWED TO EXPIRE AT 530 AM CDT...

THE THREAT OF FLASH FLOODING HAS ENDED. NO ADDTIONAL RAIN IS 
EXPECTED THIS MORNING. HOWEVER...SOME ROADS MAY STILL BE UNDER WATER 
FROM THE PREVIOUS RAINS. DO NOT ATTEMPT TO CROSS ANY ROADS THAT ARE 
STILL WATER COVERED. 

LAT...LON 4350 9489 4349 9490 4325 9491 4326 9557
      4371 9559 4372 9487

$$

CJ

Flash Flood Warnings in Minnesota, 2011Flash Flood Warnings in Iowa, 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.