Severe Thunderstorm Warning 85, NWS Sioux Falls, SD

Issued

May 5, 2012, 8:57 PM CDT (01:57 UTC)

Expired

May 5, 2012, 9:45 PM CDT

In force

48 min

Issued by

NWS Sioux Falls, SD

Area

Storm-based polygon

Hail

1.75 in

Wind

80.0 mph

Counties Brookings County, SD, Hanson County, SD, Lake County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD

The Sioux Falls radar (KFSD), 52 km from the middle of the area, began a volume at 01:57 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.

936 
WUUS53 KFSD 060157
SVRFSD
SDC011-061-079-087-097-099-101-060245-
/O.NEW.KFSD.SV.W.0085.120506T0157Z-120506T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
857 PM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHEASTERN HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
  EASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA...
  MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 945 PM CDT

* AT 855 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING MULTIPLE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF   
  BALL SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR MADISON...
  TO CANOVA...TO 5 MILES SOUTHWEST OF CANOVA...AND MOVING NORTHEAST
  AT 25 MPH.

  AT 849 PM CDT...EMERGENCY MANAGEMENT REPORTED 65 TO 75 MPH WIND
  GUSTS JUST WEST OF MADISON WITH THE FIRST STORM IN THIS LINE OF
  THUNDERSTORMS. AT 856 PM CDT...NICKEL TO QUARTER SIZE HAIL WAS
  ALSO REPORTED IN MADISON.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WENTWORTH...BALTIC AND CANOVA AROUND 900 PM CDT...
  VILAS AROUND 905 PM CDT...
  COLMAN AND DELL RAPIDS AROUND 910 PM CDT...
  HOWARD AROUND 915 PM CDT...
  TRENT AND LAKE HERMAN STATE PARK AROUND 920 PM CDT...
  WINFRED AND MADISON AROUND 925 PM CDT...
  EGAN AROUND 930 PM CDT...
  FLANDREAU AROUND 940 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS!

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF THESE
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE WEATHER...
INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE WINDS AND
POSSIBLY TORNADOES. MOVE QUICKLY TO A SAFE SHELTER...PREFERABLY INTO
AN INTERIOR ROOM...SUCH AS A BATHROOM OR A CLOSET...OR INTO A
BASEMENT.

&&

LAT...LON 4428 9645 4377 9645 4369 9775 4411 9760
TIME...MOT...LOC 0155Z 237DEG 23KT 4400 9701 4389 9739
          4386 9757
WIND...HAIL 80MPH 1.75IN

$$

JH

736 
WWUS53 KFSD 060220
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
920 PM CDT SAT MAY 5 2012

SDC061-060227-
/O.CAN.KFSD.SV.W.0085.000000T0000Z-120506T0245Z/
HANSON SD-
920 PM CDT SAT MAY 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HANSON COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED 
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT.

LAT...LON 4428 9645 4377 9645 4370 9761 4413 9749
TIME...MOT...LOC 0217Z 237DEG 23KT 4405 9683 4396 9722
          4393 9740

$$

SDC011-079-087-097-099-101-060245-
/O.CON.KFSD.SV.W.0085.000000T0000Z-120506T0245Z/
MOODY SD-MINNEHAHA SD-MINER SD-MCCOOK SD-LAKE SD-BROOKINGS SD-
920 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROOKINGS...LAKE...NORTHERN MCCOOK...EASTERN MINER...NORTHERN
MINNEHAHA AND MOODY COUNTIES UNTIL 945 PM CDT...

AT 917 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
MULTIPLE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE 
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM COLMAN TO LAKE HERMAN STATE PARK 
TO JUST EAST OF CANOVA...MOVING NORTHEAST AT 25 MPH.

AT 913 PM CDT...NICKEL TO QUARTER SIZE HAIL WAS REPORTED 4 MILES 
EAST OF WINFRED...NEAR 446TH AVENUE AND HIGHWAY 81. IN ADDITION...AT 
850 PM CDT...DAMAGING WINDS ESTIMATED AT 60 MPH OVERTURNED A SEMI 
TRUCK 2 MILES NORTH OF SALEM.

SEVERE THUNDERSTORMS WILL BE NEAR...
  LAKE HERMAN STATE PARK AND WINFRED AROUND 925 PM CDT...
  EGAN AND MADISON AROUND 930 PM CDT...
  FLANDREAU AROUND 940 PM CDT...
  RAMONA...WARD AND ELKTON AROUND 945 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

THESE ARE SUPERCELL THUNDERSTORMS. DUE TO THE ROTATING NATURE OF 
SUPERCELLS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE 
WEATHER...INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE 
WINDS AND POSSIBLY TORNADOES. BE PREPARED TO ACT QUICKLY SHOULD A 
TORNADO OCCUR OR A TORNADO WARNING BE ISSUED.

&&

LAT...LON 4428 9645 4377 9645 4370 9761 4413 9749
TIME...MOT...LOC 0217Z 237DEG 23KT 4405 9683 4396 9722
          4393 9740
WIND...HAIL 80MPH 1.75IN

$$

JH

Severe Thunderstorm Warnings in South Dakota, 2012Every severe thunderstorm warning in 2012

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.