Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 142, NWS Sioux Falls, SD

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

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 13, 2012, 8:16 PM CDT for Aurora County, Brule County, Charles Mix County, South Dakota. It was in force for 29 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, 8:16 PM CDT (01:16 UTC)
Expired: Jun 13, 2012, 8:45 PM CDT
In force: 29 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Aurora County, SD, Brule County, SD, Charles Mix County, SD

The radar

The Sioux Falls radar (KFSD), 165 km from the middle of the area, began a volume at 01:19 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, 8:20 PM CDT	HAIL 3	10 S Kimball, 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, 1.3 hours before the alert went out and 153 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.

746 
WUUS53 KFSD 140116
SVRFSD
SDC003-015-023-140145-
/O.NEW.KFSD.SV.W.0142.120614T0116Z-120614T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
816 PM CDT WED JUN 13 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN AURORA COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  SOUTHEASTERN BRULE COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  NORTH CENTRAL CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...

* UNTIL 845 PM CDT

* AT 815 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED 6 MILES SOUTH OF GRASS RANCH COLONY...OR 12 MILES SOUTH OF
  KIMBALL...AND MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH
  CENTRAL CHARLES MIX...SOUTHEASTERN BRULE AND SOUTHWESTERN AURORA
  COUNTIES.

THIS WARNING COVERS THE LARGE HAIL THREAT TO THE NORTHEAST OF THE 
TRACK IN THE EARLIER TORNADO WARNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4369 9893 4354 9862 4350 9865 4350 9870
      4344 9870 4343 9872 4360 9900
TIME...MOT...LOC 0115Z 306DEG 11KT 4356 9891
WIND...HAIL 60MPH 1.75IN

$$

CHAPMAN

1 follow-up statement

481 
WWUS53 KFSD 140130
SVSFSD

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

SDC003-015-023-140145-
/O.CON.KFSD.SV.W.0142.000000T0000Z-120614T0145Z/
CHARLES MIX SD-BRULE SD-AURORA SD-
830 PM CDT WED JUN 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
AURORA...SOUTHEASTERN BRULE AND NORTH CENTRAL CHARLES MIX COUNTIES
UNTIL 845 PM CDT...

AT 830 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE HAIL UP TO HEN
EGG SIZE...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 8 MILES SOUTH OF GRASS RANCH COLONY...OR 15 MILES SOUTH OF
KIMBALL...MOVING SOUTHEAST AT 15 MPH.

AT 820 PM CDT...3 INCH HAIL WAS REPORTED BY THE PUBLIC 10 MILES 
SOUTH OF KIMBALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4355 9892 4361 9879 4354 9862 4350 9865
      4350 9870 4345 9870 4344 9870 4343 9872
TIME...MOT...LOC 0130Z 297DEG 13KT 4354 9884
WIND...HAIL 60MPH 2.00IN

$$

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, 8:10 PM CDT	Tornado Warning	FSD	Brule, Charles Mix	35 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

Severe Thunderstorm Warnings in South Dakota, 2012 Every severe thunderstorm warning 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.