Alert archive / Minnesota / Tornado Warnings in 2012

Tornado Warning 17, NWS Sioux Falls, SD

May 4, 2012Jackson County, Nobles County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at May 4, 2012, 2:06 PM CDT for Jackson County, Nobles County, Minnesota. It was in force for 24 min. 3 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
May 4, 2012, 2:06 PM CDT (19:06 UTC)
Expired
May 4, 2012, 2:30 PM CDT
In force
24 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

Counties Jackson County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 100 km from the middle of the area, began a volume at 19:06 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.

What was reported inside it

TimeReportWhereRemark
May 4, 2:10 PM CDTTORNADO 01 N Worthington, MNTORNADO TOUCHDOWN 3/4 MILES NORTH OF WORTHINGTON NEAR THE AIRPORT.
May 4, 2:15 PM CDTHAIL 12 N Worthington, MNTHUNDERSTORM WINDS FROM 30 TO 60 MILES AN HOUR. REPORTED NEAR WORTHINGTON MUNICIPAL AIRPORT
May 4, 2:28 PM CDTTORNADO5 N Round Lake, MNTORNADO TOUCHDOWN 5 MILES NORTH OF ROUND LAKE MN.

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
May 4, 2:00 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.1 hours before the alert went out and 201 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, Minneapolis, MN at 12:00Z on 2012-05-04Temperature 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, Minneapolis, MN at 12:00Z on 2012-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -52 square meters per square second.193958Sfc1 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
1101 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-52 m²/s²
0-3 km storm-relative helicity
15 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.

085 
WFUS53 KFSD 041906
TORFSD
MNC063-105-041930-
/O.NEW.KFSD.TO.W.0017.120504T1906Z-120504T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
206 PM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL JACKSON COUNTY IN SOUTHWEST MINNESOTA...
  EAST CENTRAL NOBLES COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 230 PM CDT

* AT 206 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED NEAR WORTHINGTON...AND MOVING EAST AT
  30 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  BREWSTER AROUND 225 PM CDT...

A TORNADO WAS REPORTED 6 MILES WEST OF WORTHINGTON AT 203 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.

&&

LAT...LON 4374 9531 4353 9532 4357 9576 4370 9577
TIME...MOT...LOC 1906Z 265DEG 24KT 4361 9563

$$

SCHUMACHER
2 follow-up statements
223 
WWUS53 KFSD 041911
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
211 PM CDT FRI MAY 4 2012

MNC063-105-041930-
/O.CON.KFSD.TO.W.0017.000000T0000Z-120504T1930Z/
JACKSON MN-NOBLES MN-
211 PM CDT FRI MAY 4 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL NOBLES AND
WEST CENTRAL JACKSON COUNTIES UNTIL 230 PM CDT...

AT 210 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A CONFIRMED TORNADO.  THIS DANGEROUS STORM WAS LOCATED NEAR
WORTHINGTON...MOVING EAST AT 30 MPH.

AT 210 PM CDT...A TRONADO WAS REPORTED NEAR WORTHINGTON. DEBRIS WAS 
REPORTED NEAR WORTHINGTON.

THIS DANGEROUS STORM WILL BE NEAR...
  BREWSTER AROUND 225 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.

&&

LAT...LON 4374 9531 4353 9532 4357 9576 4370 9577
TIME...MOT...LOC 1910Z 265DEG 24KT 4361 9559

$$

SCHUMACHER
073 
WWUS53 KFSD 041932
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
232 PM CDT FRI MAY 4 2012

MNC063-105-041941-
/O.EXP.KFSD.TO.W.0017.000000T0000Z-120504T1930Z/
JACKSON MN-NOBLES MN-
232 PM CDT FRI MAY 4 2012

...THE TORNADO WARNING FOR EAST CENTRAL NOBLES HAS EXPIRED...
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN JACKSON 
COUNTY UNTIL 300 PM...
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN NOBLES AND 
NORTHWESTERN NOBLES UNTIL 245 PM...

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.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM CDT.

LAT...LON 4374 9531 4353 9532 4357 9576 4370 9577
TIME...MOT...LOC 1911Z 265DEG 24KT 4361 9558

$$

SCHUMACHER

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 1:43 PM CDTSevere Thunderstorm WarningFSDMurray, Nobles47 min
May 4, 2:18 PM CDTTornado WarningFSDJackson, Nobles27 min
May 4, 2:24 PM CDTTornado WarningFSDJackson36 min
May 4, 2:43 PM CDTSevere Thunderstorm WarningFSDCottonwood, Jackson32 min
May 4, 2:58 PM CDTTornado WarningFSDJackson32 min
May 4, 3:06 PM CDTSevere Thunderstorm WarningFSDJackson24 min
May 4, 3:23 PM CDTSevere Thunderstorm WarningFSDJackson37 min
May 4, 3:48 PM CDTFlash Flood WarningFSDJackson, Nobles5 hr

Nearby

Tornado Warnings in Minnesota, 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.