Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS La Crosse, WI

May 2, 2012Wabasha County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at May 2, 2012, 9:13 PM CDT for Wabasha County, Minnesota. It was in force for 17 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, 9:13 PM CDT (02:13 UTC)
Expired
May 2, 2012, 9:30 PM CDT
In force
17 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

County Wabasha County, MN

The radar

The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 02:17 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, 9:14 PM CDTHAIL 14 Wnw Wabasha, 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 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, 2.2 hours before the alert went out and 124 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.

566 
WUUS53 KARX 030213
SVRARX
MNC157-030230-
/O.NEW.KARX.SV.W.0009.120503T0213Z-120503T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
913 PM CDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL WABASHA COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 930 PM CDT

* AT 912 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR MAPLE SPRINGS...OR NEAR WABASHA...
  MOVING EAST AT 20 MPH. THIS STORM CAN PRODUCE LARGE DAMAGING HAIL
  UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH.   
  THIS WARNING EXTENDS THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR
  WABASHA COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4444 9222 4443 9213 4441 9209 4439 9204
      4436 9222
TIME...MOT...LOC 0214Z 256DEG 19KT 4442 9211
WIND...HAIL 60MPH 1.75IN

$$

RRS
2 follow-up statements
888 
WWUS53 KARX 030226
SVSARX

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

MNC157-030230-
/O.CON.KARX.SV.W.0009.000000T0000Z-120503T0230Z/
WABASHA MN-
926 PM CDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
WABASHA COUNTY UNTIL 930 PM CDT...

AT 920 PM TRAINED WEATHER SPOTTERS REPORTED QUARTER SIZE HAIL 4 
MILES NORTHWEST OF WABASHA WITH THIS SEVERE THUNDERSTORM.

AT 921 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR MAPLE SPRINGS...OR NEAR
WABASHA...MOVING EAST AT 20 MPH. THIS STORM CAN PRODUCE QUARTER SIZE
HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4444 9222 4443 9213 4441 9209 4439 9204
      4436 9222
TIME...MOT...LOC 0226Z 256DEG 19KT 4443 9202
WIND...HAIL 60MPH 1.00IN

$$

RRS
739 
WWUS53 KARX 030229
SVSARX

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

MNC157-030238-
/O.EXP.KARX.SV.W.0009.000000T0000Z-120503T0230Z/
WABASHA MN-
929 PM CDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WABASHA COUNTY
WILL EXPIRE AT 930 PM CDT...

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE EAST AND 
SOUTHEAST PARTS OF WABASHA COUNTY THROUGH 10 PM. 

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

LAT...LON 4444 9222 4443 9213 4441 9209 4439 9204
      4436 9222
TIME...MOT...LOC 0228Z 256DEG 19KT 4443 9201

$$

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, 9:19 PM CDTSevere Thunderstorm WarningARXWabasha, Winona56 min
May 2, 9:33 PM CDTTornado WarningARXWabasha27 min
May 3, 6:43 AM CDTSevere Thunderstorm WarningARXFillmore, Houston, Winona47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every 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.