Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 89, NWS Sioux Falls, SD

May 29, 20117 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 29, 2011, 11:39 PM CDT for 7 counties in South Dakota. It was in force for 36 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 29, 2011, 11:39 PM CDT (04:39 UTC)
Expired
May 30, 2011, 12:15 AM CDT
In force
36 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.75 in
Wind
58.0 mph

Counties Bon Homme County, SD, Charles Mix County, SD, Douglas County, SD, Gregory County, SD, Hutchinson County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 94 km from the middle of the area, began a volume at 04:38 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.

What was reported inside it

TimeReportWhereRemark
May 29, 11:44 PM CDTHAIL 0.88Dante, SD

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 29, 10:58 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.7 hours before the alert went out and 210 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2011-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2011-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1349 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
561 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.

812 
WUUS53 KFSD 300439
SVRFSD
SDC009-023-043-053-067-125-135-300515-
/O.NEW.KFSD.SV.W.0089.110530T0439Z-110530T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1139 PM CDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BON HOMME COUNTY IN SOUTHEAST SOUTH DAKOTA...
  SOUTHEASTERN CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  SOUTHEASTERN DOUGLAS COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  SOUTHEASTERN GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  SOUTHERN HUTCHINSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  SOUTHERN TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA...
  YANKTON COUNTY IN SOUTHEAST SOUTH DAKOTA...

* UNTIL 1215 AM CDT

* AT 1139 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
  BALL SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 7 MILES WEST OF PICKSTOWN TO 7 MILES SOUTH OF TABOR...AND
  MOVING NORTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WAGNER...TYNDALL...TABOR AND LEWIS AND CLARK STATE RECREATION AREA
  AROUND 1145 PM CDT...
  LAKE ANDES AND RAVINIA AROUND 1150 PM CDT...
  UTICA AROUND 1155 PM CDT...
  ARMOUR...TRIPP...SCOTLAND AND MAYFIELD AROUND 1210 AM CDT...
  MENNO AROUND 1215 AM CDT...

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
LESTERVILLE AND OLIVET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4344 9821 4316 9695 4308 9709 4308 9716
      4304 9716 4284 9749 4284 9771 4286 9787
      4307 9884
TIME...MOT...LOC 0439Z 231DEG 34KT 4310 9862 4288 9760
WIND...HAIL <58MPH 1.75IN

$$

BT
2 follow-up statements
684 
WWUS53 KFSD 300445
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1145 PM CDT SUN MAY 29 2011

SDC009-023-043-053-067-125-135-300515-
/O.CON.KFSD.SV.W.0089.000000T0000Z-110530T0515Z/
HUTCHINSON SD-GREGORY SD-DOUGLAS SD-CHARLES MIX SD-BON HOMME SD-
TURNER SD-YANKTON SD-
1145 PM CDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR YANKTON...
SOUTHERN TURNER...BON HOMME...SOUTHEASTERN CHARLES MIX...SOUTHEASTERN
DOUGLAS...SOUTHEASTERN GREGORY AND SOUTHERN HUTCHINSON COUNTIES UNTIL
1215 AM CDT...

AT 1145 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM LAKE ANDES TO LEWIS AND CLARK STATE RECREATION AREA...MOVING
NORTHEAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  RAVINIA AROUND 1150 PM CDT...
  UTICA AROUND 1155 PM CDT...
  ARMOUR...TRIPP...SCOTLAND AND MAYFIELD AROUND 1210 AM CDT...
  MENNO AROUND 1215 AM CDT...

AT 1143 PM...A TRAINED SPOTTER REPORTED GOLFBALL SIZED HAIL IN 
SPRINGFIELD. 

OTHER LOCATIONS IMPACTED BY THIS LINE OF SEVERE THUNDERSTORMS INCLUDE
LESTERVILLE AND OLIVET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4344 9821 4316 9695 4308 9709 4308 9716
      4304 9716 4284 9749 4284 9771 4286 9787
      4307 9884
TIME...MOT...LOC 0445Z 231DEG 34KT 4314 9856 4291 9754
WIND...HAIL <58MPH 1.75IN

$$

BT
220 
WWUS53 KFSD 300502
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1202 AM CDT MON MAY 30 2011

SDC009-023-043-053-067-125-135-300515-
/O.CON.KFSD.SV.W.0089.000000T0000Z-110530T0515Z/
HUTCHINSON SD-GREGORY SD-DOUGLAS SD-CHARLES MIX SD-BON HOMME SD-
TURNER SD-YANKTON SD-
1202 AM CDT MON MAY 30 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR YANKTON...
SOUTHERN TURNER...BON HOMME...SOUTHEASTERN CHARLES MIX...SOUTHEASTERN
DOUGLAS...SOUTHEASTERN GREGORY AND SOUTHERN HUTCHINSON COUNTIES UNTIL
1215 AM CDT...

AT 1202 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WALNUT
SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5
MILES NORTH OF RAVINIA TO UTICA...MOVING NORTHEAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ARMOUR...TRIPP...SCOTLAND AND MAYFIELD AROUND 1210 AM CDT...
  MENNO AROUND 1215 AM CDT...

OTHER LOCATIONS IMPACTED BY THIS LINE OF SEVERE THUNDERSTORMS INCLUDE
OLIVET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4344 9821 4316 9695 4308 9709 4308 9716
      4304 9716 4284 9749 4284 9771 4286 9787
      4307 9884
TIME...MOT...LOC 0502Z 231DEG 34KT 4324 9839 4301 9737
WIND...HAIL <58MPH 1.50IN

$$

BT

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 11:03 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix42 min
May 29, 11:30 PM CDTSevere Thunderstorm WarningFSDHutchinson, Turner45 min
May 30, 12:14 AM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix, Douglas, Hutchinson, Turner, Yankton31 min
May 30, 12:53 AM CDTSevere Thunderstorm WarningFSDDavison, Hanson, Miner, Sanborn37 min
May 30, 1:46 AM CDTSevere Thunderstorm WarningFSDBeadle, Jerauld44 min
May 30, 2:39 AM CDTSevere Thunderstorm WarningFSDBeadle36 min
May 30, 3:36 AM CDTSevere Thunderstorm WarningFSDBrookings39 min
May 30, 9:28 AM CDTRiver Flood WarningFSDMinnehaha71 hr
May 30, 5:08 PM CDTSevere Thunderstorm WarningFSDGregory37 min
May 30, 5:37 PM CDTSevere Thunderstorm WarningFSDJerauld23 min
May 30, 5:48 PM CDTTornado WarningFSDBon Homme, Charles Mix42 min
May 30, 6:26 PM CDTTornado WarningFSDBon Homme, Charles Mix, Douglas, Hutchinson34 min
May 30, 6:33 PM CDTTornado WarningFSDBeadle27 min
May 30, 6:38 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Gregory52 min
May 30, 6:51 PM CDTSevere Thunderstorm WarningFSDDavison, Hanson, Miner, Sanborn39 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.