Alert archive / South Dakota / Tornado Warnings in 2012

Tornado Warning 25, NWS Sioux Falls, SD

June 13, 2012Brule County, Charles Mix County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 13, 2012, 8:10 PM CDT for Brule County, Charles Mix County, South Dakota. It was in force for 35 min. 1 report 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: Jun 13, 2012, 8:10 PM CDT (01:10 UTC)
Expired: Jun 13, 2012, 8:45 PM CDT
In force: 35 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon

Counties Brule County, SD, Charles Mix County, SD

The radar

The Sioux Falls radar (KFSD), 170 km from the middle of the area, began a volume at 01:11 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
Jun 13, 8:31 PM CDT	HAIL 1.75	7 N Platte, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.2 hours before the alert went out and 162 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: 1191 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1769 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

205 
WFUS53 KFSD 140110
TORFSD
SDC015-023-140145-
/O.NEW.KFSD.TO.W.0025.120614T0110Z-120614T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
810 PM CDT WED JUN 13 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN BRULE COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  NORTH CENTRAL CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...

* UNTIL 845 PM CDT

* AT 810 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED 10 MILES NORTHWEST OF PLATTE...OR 16
  MILES SOUTH OF KIMBALL...AND MOVING SOUTHEAST AT 15 MPH.

* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL
  CHARLES MIX AND SOUTHEASTERN BRULE COUNTIES.

THIS EXTENDS THE PREVIOUS TORNARDO WARNING FOR SOUTHEAST BRULE AND
NORTHERN 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 4346 9871 4337 9880 4352 9901 4357 9894
TIME...MOT...LOC 0110Z 306DEG 11KT 4351 9892

$$

CHAPMAN

1 follow-up statement

606 
WWUS53 KFSD 140134
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
834 PM CDT WED JUN 13 2012

SDC015-023-140145-
/O.CON.KFSD.TO.W.0025.000000T0000Z-120614T0145Z/
CHARLES MIX SD-BRULE SD-
834 PM CDT WED JUN 13 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN BRULE AND
NORTH CENTRAL CHARLES MIX COUNTIES UNTIL 845 PM CDT...

AT 833 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES NORTH OF PLATTE...OR 20 MILES SOUTH OF
KIMBALL...MOVING SOUTHEAST AT 15 MPH.

AT 831 PM...A TRAINED SPOTTER REPORTED GOLF BALL SIZE HAIL 7 MILES 
NORTH OF PLATTE ON HIGHWAY 45.

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 4355 9892 4346 9871 4337 9880 4349 9897
TIME...MOT...LOC 0133Z 320DEG 12KT 4345 9885

$$

CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 7:13 PM CDT	Severe Thunderstorm Warning	FSD	Brule	47 min
Jun 13, 7:23 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	37 min
Jun 13, 7:35 PM CDT	Tornado Warning	FSD	Brule, Charles Mix	40 min
Jun 13, 8:16 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix	29 min
Jun 13, 8:45 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Douglas	45 min
Jun 13, 9:27 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	48 min
Jun 13, 9:38 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	22 min

Nearby

Tornado Warnings in South Dakota, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.