Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 26, NWS Aberdeen, SD

October 6, 2011Hughes County, Stanley County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Oct 6, 2011, 8:04 PM CDT for Hughes County, Stanley County, South Dakota. It was in force for 26 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: Oct 6, 2011, 8:04 PM CDT (01:04 UTC)
Expired: Oct 6, 2011, 8:30 PM CDT
In force: 26 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon

Counties Hughes County, SD, Stanley County, SD

The radar

The Rapid City radar (KUDX), 174 km from the middle of the area, began a volume at 01:06 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.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.1 hours before the alert went out and 180 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: 192 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 432 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

140 
WFUS53 KABR 070104
TORABR
SDC065-117-070130-
/O.NEW.KABR.TO.W.0026.111007T0104Z-111007T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
704 PM MDT THU OCT 6 2011

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN HUGHES COUNTY IN CENTRAL SOUTH DAKOTA...
  CENTRAL STANLEY COUNTY IN CENTRAL SOUTH DAKOTA...

* UNTIL 730 PM MDT/830 PM CDT/

* AT 659 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR WENDTE...OR 20 MILES WEST OF FORT PIERRE...
  AND MOVING NORTHEAST AT 60 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  CHANTLER CREEK REC AREA AND OAHE MISSION REC AREA AROUND 815 PM
  CDT...
  WEST SHORE REC AREA AROUND 720 PM MDT...
  SPRING CREEK REC AREA AROUND 825 PM CDT...

THIS WARNING INCLUDES HIGHWAY 14 BETWEEN MILE MARKERS 203 AND 219.

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 4430 10091 4459 10071 4458 10063 4455 10059
      4455 10035 4421 10069
TIME...MOT...LOC 0103Z 209DEG 51KT 4433 10074

$$
CONNELLY

1 follow-up statement

030 
WWUS53 KABR 070125
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
825 PM CDT THU OCT 6 2011

SDC065-117-070135-
/O.EXP.KABR.TO.W.0026.000000T0000Z-111007T0130Z/
HUGHES SD-STANLEY SD-
725 PM MDT THU OCT 6 2011

...THE TORNADO WARNING FOR CENTRAL STANLEY AND NORTHWESTERN HUGHES
COUNTIES WILL EXPIRE AT 830 PM CDT/730 PM MDT/...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA...AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4430 10091 4459 10071 4458 10063 4455 10059
      4455 10035 4421 10069
TIME...MOT...LOC 0125Z 209DEG 51KT 4460 10052

$$
CONNELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 7:22 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	53 min
Oct 6, 7:52 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	38 min
Oct 6, 8:01 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	44 min
Oct 6, 8:15 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Stanley, Sully	33 min
Oct 6, 8:23 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Hughes, Potter, Stanley, Sully	52 min
Oct 6, 8:34 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	41 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.