Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 22, NWS Sioux Falls, SD

May 30, 2011Bon Homme County, Charles Mix County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 30, 2011, 5:48 PM CDT for Bon Homme County, Charles Mix County, South Dakota. It was in force for 42 min. 4 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 30, 2011, 5:48 PM CDT (22:48 UTC)
Expired: May 30, 2011, 6:30 PM CDT
In force: 42 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon

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

The radar

The Sioux Falls radar (KFSD), 138 km from the middle of the area, began a volume at 22:50 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
May 30, 6:03 PM CDT	HAIL 1	4 Ese Pickstown, SD
May 30, 6:09 PM CDT	TSTM WND GST 60	6 S Wagner, SD
May 30, 6:26 PM CDT	TORNADO	5 Nne Dante, SD
May 30, 6:28 PM CDT	TSTM WND GST 80	4 Ne 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 30, 2:08 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.8 hours before the alert went out and 213 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: 485 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 758 m²/s²
0-3 km storm-relative helicity: 711 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

699 
WFUS53 KFSD 302248
TORFSD
SDC009-023-302330-
/O.NEW.KFSD.TO.W.0022.110530T2248Z-110530T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
548 PM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BON HOMME COUNTY IN SOUTHEAST SOUTH DAKOTA...
  SOUTHEASTERN CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...

* UNTIL 630 PM CDT

* AT 548 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A CONFIRMED TORNADO NEAR BRISTOW...OR 9 MILES EAST OF
  SPENCER. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT 50
  MPH.

* THE TORNADO WILL BE NEAR...
  MARTY AROUND 600 PM CDT...
  WAGNER AROUND 610 PM CDT...
  DANTE AROUND 615 PM CDT...
  AVON AROUND 620 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4284 9815 4283 9820 4286 9824 4288 9832
      4290 9836 4292 9844 4298 9850 4304 9851
      4325 9828 4318 9807 4317 9807 4317 9803
      4314 9794 4281 9811
TIME...MOT...LOC 2248Z 232DEG 42KT 4285 9850

$$

WEISSER

4 follow-up statements

017 
WWUS53 KFSD 302301
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
601 PM CDT MON MAY 30 2011

SDC009-023-302330-
/O.CON.KFSD.TO.W.0022.000000T0000Z-110530T2330Z/
CHARLES MIX SD-BON HOMME SD-
601 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 630 PM CDT...

AT 600 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR MARTY...OR 11 MILES SOUTHEAST OF PICKSTOWN...
MOVING NORTHEAST AT 45 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  WAGNER AROUND 610 PM CDT...
  DANTE AROUND 615 PM CDT...
  AVON AROUND 620 PM CDT...

THIS STORM WILL ALSO BE CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF 
GOLF BALLS...ESPECIALLY NEAR MARTY. THIS STORM HAS ALSO HAD 
CONFIRMED TORNADOES ACROSS CENTRAL NEBRASKA AND A WALL CLOUD WAS 
REPORTED AS IT WAS MOVING INTO SOUTHEASTERN CHARLES MIX COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4284 9815 4283 9820 4286 9824 4288 9832
      4290 9836 4292 9844 4298 9850 4304 9851
      4325 9828 4318 9807 4317 9807 4317 9803
      4314 9794 4281 9811
TIME...MOT...LOC 2300Z 231DEG 41KT 4295 9837

$$

WEISSER

686 
WWUS53 KFSD 302308
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
608 PM CDT MON MAY 30 2011

SDC009-023-302330-
/O.CON.KFSD.TO.W.0022.000000T0000Z-110530T2330Z/
CHARLES MIX SD-BON HOMME SD-
608 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 630 PM CDT...

AT 608 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES EAST OF MARTY...OR 12 MILES SOUTHEAST OF
PICKSTOWN...MOVING NORTHEAST AT 45 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  DANTE AROUND 615 PM CDT...
  AVON AROUND 620 PM CDT...

AT 607 PM CDT...A WALL CLOUD WAS REPORTED SOUTHWEST OF DANTE. THE 
STORM DOES APPEAR TO BE STRENGTHENING AS IT MOVES TOWARDS DANTE. 
THIS STORM HAS HAD A HISTORY OF PRODUCING TORNADOES ACROSS NEBRASKA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SIOUX FALLS.

&&

LAT...LON 4284 9815 4283 9820 4286 9824 4288 9832
      4290 9836 4292 9844 4298 9850 4304 9851
      4325 9828 4318 9807 4317 9807 4317 9803
      4314 9794 4281 9811
TIME...MOT...LOC 2308Z 233DEG 41KT 4302 9827

$$

WEISSER

221 
WWUS53 KFSD 302315
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
615 PM CDT MON MAY 30 2011

SDC009-023-302330-
/O.CON.KFSD.TO.W.0022.000000T0000Z-110530T2330Z/
CHARLES MIX SD-BON HOMME SD-
615 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN BON HOMME AND
SOUTHEASTERN CHARLES MIX COUNTIES UNTIL 630 PM CDT...

AT 615 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR DANTE...OR 15 MILES EAST OF PICKSTOWN...MOVING
NORTHEAST AT 40 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  AVON AROUND 620 PM CDT...

AT 609 PM CDT...LAW ENFORCEMENT REPORTED 60 MPH WINDS 6 MILES SOUTH 
OF WAGNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SIOUX FALLS.

&&

LAT...LON 4284 9815 4283 9820 4286 9824 4288 9832
      4290 9836 4292 9844 4298 9850 4304 9851
      4325 9828 4318 9807 4317 9807 4317 9803
      4314 9794 4281 9811
TIME...MOT...LOC 2315Z 233DEG 37KT 4306 9820

$$

WEISSER

077 
WWUS53 KFSD 302328
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
628 PM CDT MON MAY 30 2011

SDC009-023-302338-
/O.EXP.KFSD.TO.W.0022.000000T0000Z-110530T2330Z/
CHARLES MIX SD-BON HOMME SD-
628 PM CDT MON MAY 30 2011

...THE TORNADO WARNING FOR WESTERN BON HOMME AND SOUTHEASTERN CHARLES
MIX COUNTIES WILL EXPIRE AT 630 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

AT 626 PM CDT...A STORM SPOTTER REPORTED A TORNADO 5 MILES NORTHEAST 
OF DANTE. THIS TORNADO IS MOVING TOWARDS TRIPP. PLEASE TAKE COVER IF 
YOU LIVE ANYWHERE BETWEEN DANTE AND TRIPP.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN SIOUX FALLS.

LAT...LON 4284 9815 4283 9820 4286 9824 4288 9832
      4290 9836 4292 9844 4298 9850 4304 9851
      4325 9828 4318 9807 4317 9807 4317 9803
      4314 9794 4281 9811
TIME...MOT...LOC 2328Z 233DEG 37KT 4314 9805

$$

WEISSER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:03 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	42 min
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, 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

Tornado Warnings in South Dakota, 2011 Every tornado warning in 2011 Tornadoes 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.