Alert archive / Minnesota / Tornado Warnings in 2012

Tornado Warning 4, NWS La Crosse, WI

May 2, 2012Wabasha County, Minnesota; Buffalo County, Wisconsin

NWS La Crosse, WI issued this tornado warning at May 2, 2012, 9:33 PM CDT for Wabasha County, Minnesota; Buffalo County, Wisconsin. It was in force for 27 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
May 2, 2012, 9:33 PM CDT (02:33 UTC)
Expired
May 2, 2012, 10:00 PM CDT
In force
27 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon

Counties Wabasha County, MN, Buffalo County, WI

The radar

The La Crosse radar (KARX), 78 km from the middle of the area, began a volume at 02:35 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 2, 9:35 PM CDTTSTM WND DMG3 E Alma, WITREES DOWN IN ALMA. PART OF A SHED LEANING ON POWER LINES EAST OF ALMA. TIME ESTIMATED BY RADAR.

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 2, 5:25 PM CDTSevere Thunderstorm WatchSPC4 hr
May 2, 7:47 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.6 hours before the alert went out and 151 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 00:00Z on 2012-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2012-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.1939587897Sfc1 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
84 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1937 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

250 
WFUS53 KARX 030233
TORARX
MNC157-WIC011-030300-
/O.NEW.KARX.TO.W.0004.120503T0233Z-120503T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
933 PM CDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL WABASHA COUNTY IN SOUTHEAST MINNESOTA...
  CENTRAL BUFFALO COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1000 PM CDT

* AT 931 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR HIGHWAYS 37 AND 35...OR NEAR ALMA...MOVING EAST AT 20
  MPH.

* THE TORNADO WILL BE NEAR...
  TELL AROUND 940 PM...
  HEROLD AROUND 945 PM...
  PRAAG AROUND 955 PM...
  CREAM AROUND 1000 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR
AND STAY AWAY FROM WINDOWS! CARS AND MOBILE HOMES SHOULD BE ABANDONED
FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND
COVER YOUR HEAD.

&&

LAT...LON 4439 9172 4427 9174 4432 9196 4438 9199
TIME...MOT...LOC 0234Z 282DEG 16KT 4434 9191

$$

RRS
2 follow-up statements
743 
WWUS53 KARX 030243
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
943 PM CDT WED MAY 2 2012

MNC157-030252-
/O.CAN.KARX.TO.W.0004.000000T0000Z-120503T0300Z/
WABASHA MN-
943 PM CDT WED MAY 2 2012

...THE TORNADO WARNING FOR EAST CENTRAL WABASHA COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
THURSDAY MORNING FOR SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN.

LAT...LON 4431 9189 4438 9190 4439 9172 4427 9174
TIME...MOT...LOC 0242Z 279DEG 27KT 4433 9183

$$

WIC011-030300-
/O.CON.KARX.TO.W.0004.000000T0000Z-120503T0300Z/
BUFFALO WI-
943 PM CDT WED MAY 2 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL BUFFALO COUNTY
UNTIL 1000 PM CDT...

AT 940 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
POSSIBLE TORNADO LOCATED NEAR HEROLD...OR 6 MILES EAST OF ALMA... 
MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  CREAM AND PRAAG AROUND 950 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR
AND STAY AWAY FROM WINDOWS! CARS AND MOBILE HOMES SHOULD BE ABANDONED
FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND
COVER YOUR HEAD.

&&

LAT...LON 4431 9189 4438 9190 4439 9172 4427 9174
TIME...MOT...LOC 0242Z 279DEG 27KT 4433 9183

$$

RRS
374 
WWUS53 KARX 030254
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
954 PM CDT WED MAY 2 2012

WIC011-030304-
/O.EXP.KARX.TO.W.0004.000000T0000Z-120503T0300Z/
BUFFALO WI-
954 PM CDT WED MAY 2 2012

...THE TORNADO WARNING FOR CENTRAL BUFFALO COUNTY WILL EXPIRE AT 1000
PM CDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
THURSDAY MORNING FOR SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN.

LAT...LON 4431 9189 4438 9190 4439 9172 4427 9174
TIME...MOT...LOC 0254Z 279DEG 27KT 4431 9171

$$

RRS

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 2, 7:29 PM CDTSevere Thunderstorm WarningARXWabasha, Winona38 min
May 2, 8:10 PM CDTSevere Thunderstorm WarningARXWabasha65 min
May 2, 8:48 PM CDTSevere Thunderstorm WarningARXWabasha72 min
May 2, 8:51 PM CDTFlash Flood WarningARXWabasha6 hr
May 2, 9:13 PM CDTSevere Thunderstorm WarningARXWabasha17 min
May 2, 9:19 PM CDTSevere Thunderstorm WarningARXWabasha, Winona56 min
May 3, 6:43 AM CDTSevere Thunderstorm WarningARXFillmore, Houston, Winona47 min
May 2, 9:23 PM CDTSevere Thunderstorm WarningARXTrempealeau67 min
May 2, 9:53 PM CDTSevere Thunderstorm WarningARXTrempealeau52 min
May 2, 10:26 PM CDTSevere Thunderstorm WarningARXJackson30 min
May 3, 7:11 AM CDTSevere Thunderstorm WarningARXLa Crosse, Trempealeau, Vernon49 min
May 3, 7:45 AM CDTSevere Thunderstorm WarningARXAdams30 min
May 3, 8:09 AM CDTSevere Thunderstorm WarningARXRichland26 min

Nearby

Tornado Warnings in Minnesota, 2012Tornado Warnings in Wisconsin, 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.