Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 63, NWS Sioux Falls, SD

May 11, 2011Lake County, Minnehaha County, Moody County, South Dakota; Murray County, Pipestone County, Rock County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 11, 2011, 7:14 PM CDT for Lake County, Minnehaha County, Moody County, South Dakota; Murray County, Pipestone County, Rock County, Minnesota. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2011, 7:14 PM CDT (00:14 UTC)
Expired: May 11, 2011, 7:45 PM CDT
In force: 31 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Murray County, MN, Pipestone County, MN, Rock County, MN, Lake County, SD, Minnehaha County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 28 km from the middle of the area, began a volume at 00:15 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.2 hours before the alert went out and 192 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

936 
WUUS53 KFSD 120014
SVRFSD
MNC101-117-133-SDC079-099-101-120045-
/O.NEW.KFSD.SV.W.0063.110512T0014Z-110512T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
714 PM CDT WED MAY 11 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MURRAY COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHERN PIPESTONE COUNTY IN SOUTHWEST MINNESOTA...
  NORTHERN ROCK COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHEASTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA...
  SOUTHERN MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 745 PM CDT

* AT 714 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM HARTFORD TO LUVERNE...AND MOVING NORTH
  AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  BLUE MOUNDS STATE PARK AND PALISADES STATE PARK AROUND 720 PM
  CDT...
  GARRETSON AROUND 725 PM CDT...
  HARDWICK...SHERMAN AND BALTIC AROUND 730 PM CDT...
  COLTON AROUND 735 PM CDT...
  EDGERTON AND DELL RAPIDS AROUND 740 PM CDT...
  JASPER...CHESTER AND TROSKY AROUND 745 PM CDT...

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
KENNETH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

LINES OF STORMS CAN OCCASSIONALY PRODUCE BRIEF TORNADOES IN ADDITION 
TO WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY LIKELY...FOR YOUR 
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME 
OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS INJURY 
AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 4391 9597 4385 9600 4385 9606 4371 9605
      4363 9609 4362 9705 4375 9714 4384 9713
      4384 9719 4389 9722
TIME...MOT...LOC 0014Z 158DEG 26KT 4364 9701 4364 9619
WIND...HAIL 60MPH <1.00IN

$$

LAFLIN

1 follow-up statement

813 
WWUS53 KFSD 120038
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
738 PM CDT WED MAY 11 2011

MNC101-117-133-SDC079-099-101-120048-
/O.EXP.KFSD.SV.W.0063.000000T0000Z-110512T0045Z/
PIPESTONE MN-MURRAY MN-ROCK MN-MOODY SD-LAKE SD-MINNEHAHA SD-
738 PM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MINNEHAHA...
SOUTHEASTERN LAKE...SOUTHERN MOODY...NORTHERN ROCK...SOUTHWESTERN
MURRAY AND SOUTHERN PIPESTONE COUNTIES WILL EXPIRE AT 745 PM CDT...

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

LAT...LON 4391 9597 4385 9600 4385 9606 4371 9605
      4363 9609 4362 9705 4375 9714 4384 9713
      4384 9719 4389 9722
TIME...MOT...LOC 0038Z 158DEG 26KT 4380 9710 4380 9628

$$

LAFLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:07 PM CDT	Severe Thunderstorm Warning	FSD	Nobles, Rock	23 min
May 11, 7:27 PM CDT	Severe Thunderstorm Warning	FSD	Nobles, Rock	33 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2011 Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

Sources

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.