Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 24, NWS Sioux Falls, SD

May 30, 2011Beadle County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 30, 2011, 6:33 PM CDT for Beadle County, South Dakota. It was in force for 27 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 30, 2011, 6:33 PM CDT (23:33 UTC)
Expired
May 30, 2011, 7:00 PM CDT
In force
27 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

County Beadle County, SD

The radar

The Aberdeen radar (KABR), 102 km from the middle of the area, began a volume at 23:36 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 watch it was issued in

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

IssuedProductOfficeLasted
May 30, 2:08 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.6 hours before the alert went out and 41 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 12:00Z on 2011-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2011-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 758 square meters per square second.19395878Sfc1 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
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.

900 
WFUS53 KFSD 302333
TORFSD
SDC005-310000-
/O.NEW.KFSD.TO.W.0024.110530T2333Z-110531T0000Z/

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL BEADLE COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 700 PM CDT

* AT 633 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED 11 MILES EAST OF HITCHCOCK...OR 14
  MILES NORTH OF HURON...AND MOVING NORTHEAST AT 45 MPH.

* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL
  BEADLE COUNTY...NORTHEAST OF BROADLAND.

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 4463 9804 4438 9827 4440 9853 4464 9832
      4464 9807
TIME...MOT...LOC 2333Z 219DEG 40KT 4460 9817

$$

CHAPMAN
2 follow-up statements
078 
WWUS53 KFSD 302348
SVSFSD

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

SDC005-310000-
/O.CON.KFSD.TO.W.0024.000000T0000Z-110531T0000Z/
BEADLE SD-
648 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL BEADLE
COUNTY UNTIL 700 PM CDT...

AT 647 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES WEST OF CARPENTER...OR 19 MILES NORTHEAST 
OF HURON...MOVING EAST AT 25 MPH.  ANOTHER STORM WAS LOCATED 5 MILES 
EAST NORTHEAST OF BROADLAND...AND WILL BE CAPABLE OF PRODUCING HAIL 
UP TO QUARTER SIZE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4463 9804 4445 9821 4457 9838 4464 9832
      4464 9807
TIME...MOT...LOC 2347Z 253DEG 22KT 4462 9804

$$

CHAPMAN
366 
WWUS53 KFSD 302358
SVSFSD

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

SDC005-310008-
/O.EXP.KFSD.TO.W.0024.000000T0000Z-110531T0000Z/
BEADLE SD-
658 PM CDT MON MAY 30 2011

...THE TORNADO WARNING FOR NORTH CENTRAL BEADLE COUNTY WILL EXPIRE AT
700 PM CDT...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 900 PM CDT.

LAT...LON 4463 9804 4445 9821 4457 9838 4464 9832
      4464 9807
TIME...MOT...LOC 2358Z 253DEG 22KT 4464 9795

$$

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 29, 11:39 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix, Douglas, Gregory, Hutchinson, Turner and 1 more36 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, 6:38 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Gregory52 min
May 30, 6:51 PM CDTSevere Thunderstorm WarningFSDDavison, Hanson, Miner, Sanborn39 min

Nearby

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