Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 16, NWS Aberdeen, SD

July 10, 2011Deuel County, Grant County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 10, 2011, 7:36 PM CDT for Deuel County, Grant County, South Dakota. It was in force for 9 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: Jul 10, 2011, 7:36 PM CDT (00:36 UTC)
Expired: Jul 10, 2011, 7:45 PM CDT
In force: 9 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon

Counties Deuel County, SD, Grant County, SD

The radar

The Aberdeen radar (KABR), 149 km from the middle of the area, began a volume at 00:37 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.

Issued	Product	Office	Lasted
Jul 10, 2:29 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.6 hours before the alert went out and 144 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: 6 J/kg
Mixed-layer CIN: -409 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -368 m²/s²
0-3 km storm-relative helicity: -214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

842 
WFUS53 KABR 110036
TORABR
SDC039-051-110045-
/O.NEW.KABR.TO.W.0016.110711T0036Z-110711T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
736 PM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DEUEL COUNTY IN NORTHEAST SOUTH DAKOTA...
  SOUTHEASTERN GRANT COUNTY IN NORTHEAST SOUTH DAKOTA...

* UNTIL 745 PM CDT

* AT 733 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR LA BOLT...OR 13 MILES SOUTH OF MILBANK...AND
  MOVING SOUTHEAST AT 45 MPH.

* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN
  DEUEL AND SOUTHEASTERN GRANT COUNTIES.

THIS WARNING INCLUDES HIGHWAY 212 BETWEEN MILE MARKERS 404 AND 411.

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4517 9646 4488 9646 4498 9677 4520 9676
TIME...MOT...LOC 0036Z 294DEG 40KT 4502 9658

$$
TMT

1 follow-up statement

505 
WWUS53 KABR 110045
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
745 PM CDT SUN JUL 10 2011

SDC039-051-110056-
/O.EXP.KABR.TO.W.0016.000000T0000Z-110711T0045Z/
GRANT SD-DEUEL SD-
745 PM CDT SUN JUL 10 2011

...THE TORNADO WARNING FOR NORTHEASTERN DEUEL AND SOUTHEASTERN GRANT
COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR WEST CENTRAL MINNESOTA AND NORTHEASTERN SOUTH DAKOTA.

LAT...LON 4517 9646 4488 9646 4498 9677 4520 9676
TIME...MOT...LOC 0036Z 294DEG 40KT 4488 9667

$$
TMT

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.