Alert archive / South Dakota / Tornado Warnings in 2012

Tornado Warning 9, NWS Aberdeen, SD

June 17, 2012Brown County, Day County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 17, 2012, 6:13 PM CDT for Brown County, Day County, South Dakota. It was in force for 23 min. 2 reports 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 17, 2012, 6:13 PM CDT (23:13 UTC)
Expired
Jun 17, 2012, 6:36 PM CDT
In force
23 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon

Counties Brown County, SD, Day County, SD

The radar

The Aberdeen radar (KABR), 48 km from the middle of the area, began a volume at 23:13 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

TimeReportWhereRemark
Jun 17, 6:15 PM CDTHAIL 15 N Groton, SD
Jun 17, 6:45 PM CDTHAIL 1.756 Nw Groton, SD

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

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 17, 3:45 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.2 hours before the alert went out and 80 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 2012-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2012-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 301 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
2160 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
301 m²/s²
0-3 km storm-relative helicity
545 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

968 
WFUS53 KABR 172313
TORABR
SDC013-037-180000-
/O.NEW.KABR.TO.W.0009.120617T2313Z-120618T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
613 PM CDT SUN JUN 17 2012

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL BROWN COUNTY IN NORTHEAST SOUTH DAKOTA...
  NORTHWESTERN DAY COUNTY IN NORTHEAST SOUTH DAKOTA...

* UNTIL 700 PM CDT

* AT 608 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GROTON...AND MOVING EAST AT 40 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  ANDOVER AROUND 625 PM CDT...
  PIERPONT AROUND 630 PM CDT...
  BRISTOL AROUND 635 PM CDT...
  HOLMQUIST AROUND 645 PM CDT...

THIS WARNING INCLUDES HIGHWAY 12 BETWEEN MILE MARKERS 305 AND 340.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR
ROOM ON THE LOWEST FLOOR!

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 4557 9753 4533 9756 4537 9820 4555 9819
TIME...MOT...LOC 2313Z 272DEG 33KT 4546 9805

$$
FOWLE
2 follow-up statements
083 
WWUS53 KABR 172328
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
628 PM CDT SUN JUN 17 2012

SDC013-037-180000-
/O.CON.KABR.TO.W.0009.000000T0000Z-120618T0000Z/
DAY SD-BROWN SD-
628 PM CDT SUN JUN 17 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR EXTREME EAST CENTRAL BROWN
AND NORTHWESTERN DAY COUNTIES UNTIL 700 PM CDT...

AT 627 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR PIERPONT...OR 11 MILES EAST OF GROTON...MOVING
EAST AT 40 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  BRISTOL AROUND 635 PM CDT...
  HOLMQUIST AROUND 645 PM CDT...

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.

&&

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

LAT...LON 4536 9795 4555 9804 4557 9753 4533 9756
TIME...MOT...LOC 2328Z 272DEG 33KT 4545 9785

$$
FOWLE
397 
WWUS53 KABR 172336
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
636 PM CDT SUN JUN 17 2012

SDC013-037-172346-
/O.CAN.KABR.TO.W.0009.000000T0000Z-120618T0000Z/
DAY SD-BROWN SD-
636 PM CDT SUN JUN 17 2012

...THE TORNADO WARNING FOR EAST CENTRAL BROWN AND NORTHWESTERN DAY
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER GUSTY WINDS AND HEAVY RAIN 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 4536 9795 4555 9804 4557 9753 4533 9756
TIME...MOT...LOC 2336Z 272DEG 33KT 4545 9775

$$
FOWLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 5:06 PM CDTSevere Thunderstorm WarningABRMarshall39 min
Jun 17, 5:12 PM CDTSevere Thunderstorm WarningABRBrown, Edmunds, McPherson63 min
Jun 17, 5:32 PM CDTSevere Thunderstorm WarningABRBrown, Day, Marshall58 min
Jun 17, 5:34 PM CDTTornado WarningABRMarshall26 min
Jun 17, 5:45 PM CDTSevere Thunderstorm WarningABRMarshall45 min
Jun 17, 5:50 PM CDTSevere Thunderstorm WarningABRRoberts40 min
Jun 17, 5:53 PM CDTSevere Thunderstorm WarningABRBrown, Day, Marshall47 min
Jun 17, 5:53 PM CDTSevere Thunderstorm WarningABRDay, Marshall, Roberts52 min
Jun 17, 5:59 PM CDTTornado WarningABRMarshall, Roberts31 min
Jun 17, 6:05 PM CDTSevere Thunderstorm WarningABRRoberts40 min
Jun 17, 6:40 PM CDTSevere Thunderstorm WarningABRDay, Marshall, Roberts65 min
Jun 17, 6:46 PM CDTTornado WarningABRRoberts34 min

Nearby

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