Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 87, NWS Sioux Falls, SD

May 29, 2011Bon Homme County, Charles Mix County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 29, 2011, 11:03 PM CDT for Bon Homme County, Charles Mix County, South Dakota. It was in force for 42 min. 2 reports 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, 11:03 PM CDT (04:03 UTC)
Expired: May 29, 2011, 11:45 PM CDT
In force: 42 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 58.0 mph

Counties Bon Homme County, SD, Charles Mix County, SD

The radar

The Sioux Falls radar (KFSD), 135 km from the middle of the area, began a volume at 04:06 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

Time	Report	Where	Remark
May 29, 11:43 PM CDT	HAIL 1.75	Springfield, SD
May 29, 11:44 PM CDT	HAIL 0.88	Dante, 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.

Issued	Product	Office	Lasted
May 29, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.1 hours before the alert went out and 223 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: 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.

499 
WUUS53 KFSD 300403
SVRFSD
SDC009-023-300445-
/O.NEW.KFSD.SV.W.0087.110530T0403Z-110530T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1103 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...

* UNTIL 1145 PM CDT

* AT 1103 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HALF
  DOLLAR SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 7 MILES SOUTH OF BRISTOW TO 7 MILES NORTHWEST OF BLOOMFIELD...
  AND MOVING NORTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SPRINGFIELD AROUND 1120 PM CDT...
  MARTY AROUND 1130 PM CDT...
  PICKSTOWN...TYNDALL...TABOR AND AVON AROUND 1135 PM CDT...
  WAGNER AND DANTE AROUND 1140 PM CDT...
  RAVINIA AND LAKE ANDES AROUND 1145 PM CDT...

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 4276 9806 4284 9815 4283 9820 4292 9844
      4298 9850 4303 9851 4307 9857 4319 9853
      4311 9764 4285 9764 4284 9772 4286 9786
      4280 9789 4276 9794
TIME...MOT...LOC 0403Z 203DEG 34KT 4275 9855 4268 9775
WIND...HAIL <58MPH 1.25IN

$$

BT

3 follow-up statements

845 
WWUS53 KFSD 300408
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1108 PM CDT SUN MAY 29 2011

SDC009-023-300445-
/O.CON.KFSD.SV.W.0087.000000T0000Z-110530T0445Z/
CHARLES MIX SD-BON HOMME SD-
1108 PM CDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 1145 PM CDT...

AT 1108 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 5 MILES SOUTHWEST OF LYNCH TO 8 MILES NORTHWEST OF BLOOMFIELD...
MOVING NORTHEAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SPRINGFIELD AROUND 1120 PM CDT...
  MARTY AROUND 1130 PM CDT...
  PICKSTOWN...TYNDALL...TABOR AND AVON AROUND 1135 PM CDT...
  WAGNER AND DANTE AROUND 1140 PM CDT...
  RAVINIA AND LAKE ANDES AROUND 1145 PM CDT...

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 4276 9806 4284 9815 4283 9820 4292 9844
      4298 9850 4303 9851 4307 9857 4319 9853
      4311 9764 4285 9764 4284 9772 4286 9786
      4280 9789 4276 9794
TIME...MOT...LOC 0408Z 203DEG 34KT 4279 9852 4272 9772
WIND...HAIL <58MPH 1.75IN

$$

BT

442 
WWUS53 KFSD 300420
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1120 PM CDT SUN MAY 29 2011

SDC009-023-300445-
/O.CON.KFSD.SV.W.0087.000000T0000Z-110530T0445Z/
CHARLES MIX SD-BON HOMME SD-
1120 PM CDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 1145 PM CDT...

AT 1120 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 LYNCH TO 9 MILES SOUTHEAST OF SANTEE...MOVING NORTHEAST AT 40
MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MARTY AROUND 1130 PM CDT...
  PICKSTOWN...TYNDALL...TABOR AND AVON AROUND 1135 PM CDT...
  WAGNER AND DANTE AROUND 1140 PM CDT...
  RAVINIA AND LAKE ANDES AROUND 1145 PM CDT...

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 4276 9806 4284 9815 4283 9820 4292 9844
      4298 9850 4303 9851 4307 9857 4319 9853
      4311 9764 4285 9764 4284 9772 4286 9786
      4280 9789 4276 9794
TIME...MOT...LOC 0420Z 203DEG 34KT 4290 9846 4282 9766
WIND...HAIL <58MPH 1.75IN

$$

BT

794 
WWUS53 KFSD 300434
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1134 PM CDT SUN MAY 29 2011

SDC009-023-300445-
/O.CON.KFSD.SV.W.0087.000000T0000Z-110530T0445Z/
CHARLES MIX SD-BON HOMME SD-
1134 PM CDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 1145 PM CDT...

AT 1133 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DESTRUCTIVE HAIL UP TO HEN EGG SIZE.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM MARTY TO TABOR...MOVING NORTHEAST AT 40 MPH. 
THE STRONGEST PORTION OF THIS STORM WAS NEAR SANTEE.

SEVERE THUNDERSTORMS WILL BE NEAR...
  WAGNER AND DANTE AROUND 1140 PM CDT...
  RAVINIA AND LAKE ANDES AROUND 1145 PM CDT...


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 4276 9806 4284 9815 4283 9820 4292 9844
      4298 9850 4303 9851 4307 9857 4319 9853
      4311 9764 4285 9764 4284 9772 4286 9786
      4280 9789 4276 9794
TIME...MOT...LOC 0433Z 203DEG 34KT 4301 9839 4293 9759
WIND...HAIL <58MPH 2.00IN

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:30 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	45 min
May 29, 11:39 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Gregory, Hutchinson, Turner and 1 more	36 min
May 30, 12:14 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson, Turner, Yankton	31 min
May 30, 12:53 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	37 min
May 30, 1:46 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	44 min
May 30, 2:39 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	36 min
May 30, 3:36 AM CDT	Severe Thunderstorm Warning	FSD	Brookings	39 min
May 30, 9:28 AM CDT	River Flood Warning	FSD	Minnehaha	71 hr
May 30, 5:08 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	37 min
May 30, 5:37 PM CDT	Severe Thunderstorm Warning	FSD	Jerauld	23 min
May 30, 5:48 PM CDT	Tornado Warning	FSD	Bon Homme, Charles Mix	42 min
May 30, 6:26 PM CDT	Tornado Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson	34 min
May 30, 6:33 PM CDT	Tornado Warning	FSD	Beadle	27 min
May 30, 6:38 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	52 min
May 30, 6:51 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	39 min

Nearby

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