Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 85, NWS La Crosse, WI

July 30, 2011Olmsted County, Wabasha County, Winona County, Minnesota; Buffalo County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 30, 2011, 11:57 PM CDT for Olmsted County, Wabasha County, Winona County, Minnesota; Buffalo County, Wisconsin. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 30, 2011, 11:57 PM CDT (04:57 UTC)
Expired: Jul 31, 2011, 1:00 AM CDT
In force: 63 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Olmsted County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI

The radar

The La Crosse radar (KARX), 103 km from the middle of the area, began a volume at 04:57 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.0 hours before the alert went out and 121 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: 2387 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1239 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

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

450 
WUUS53 KARX 310457
SVRARX
MNC109-157-169-WIC011-310600-
/O.NEW.KARX.SV.W.0085.110731T0457Z-110731T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1157 PM CDT SAT JUL 30 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN OLMSTED COUNTY IN SOUTHEAST MINNESOTA...
  WABASHA COUNTY IN SOUTHEAST MINNESOTA...
  NORTHWESTERN WINONA COUNTY IN SOUTHEAST MINNESOTA...
  BUFFALO COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 100 AM CDT

* AT 1152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM 10 MILES
  WEST OF DURAND TO 11 MILES SOUTHWEST OF RED WING...MOVING SOUTHEAST
  AT 40 MPH. THESE STORMS CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  LAKE CITY AROUND 1205 AM...
  MAZEPPA AROUND 1210 AM...
  WABASHA AROUND 1220 AM...
  MODENA AROUND 1225 AM...
  ALMA AND KELLOGG AROUND 1230 AM...
  PLAINVIEW AND ELGIN AROUND 1235 AM...
  BUFFALO AROUND 1240 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4437 9244 4446 9243 4446 9224 4444 9221
      4442 9209 4451 9205 4458 9204 4460 9199
      4427 9153 4398 9220 4428 9256 4436 9256
TIME...MOT...LOC 0457Z 316DEG 35KT 4461 9211 4441 9265
WIND...HAIL 60MPH 1.00IN

$$

HALBACH

5 follow-up statements

315 
WWUS53 KARX 310513
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1213 AM CDT SUN JUL 31 2011

MNC109-157-169-WIC011-310600-
/O.CON.KARX.SV.W.0085.000000T0000Z-110731T0600Z/
OLMSTED MN-WABASHA MN-WINONA MN-BUFFALO WI-
1213 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BUFFALO...NORTHWESTERN WINONA...WABASHA AND NORTHEASTERN OLMSTED
COUNTIES UNTIL 100 AM CDT...

AT 1211 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM LAKE CITY TO
MAZEPPA...MOVING SOUTHEAST AT 45 MPH. THESE STORMS CAN PRODUCE
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  WABASHA AROUND 1225 AM...
  ALMA AND KELLOGG AROUND 1230 AM...
  PLAINVIEW AROUND 1235 AM...
  BUFFALO AROUND 1240 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

&&

LAT...LON 4438 9244 4445 9244 4446 9243 4446 9224
      4444 9221 4442 9209 4449 9206 4427 9153
      4398 9220 4428 9256 4436 9256
TIME...MOT...LOC 0513Z 309DEG 39KT 4441 9218 4430 9239
WIND...HAIL 60MPH 1.00IN

$$

HALBACH

303 
WWUS53 KARX 310527
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1227 AM CDT SUN JUL 31 2011

MNC109-157-169-WIC011-310600-
/O.CON.KARX.SV.W.0085.000000T0000Z-110731T0600Z/
OLMSTED MN-WABASHA MN-WINONA MN-BUFFALO WI-
1227 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BUFFALO...NORTHWESTERN WINONA...WABASHA AND NORTHEASTERN OLMSTED
COUNTIES UNTIL 100 AM CDT...

AT 1225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM WABASHA TO 
HAMMOND...MOVING SOUTHEAST AT 45 MPH. THESE STORMS CAN PRODUCE 
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  ALMA AROUND 1230 AM...
  PLAINVIEW 1235 AM...
  BUFFALO AROUND 1240 AM...
  ELBA AROUND 1250 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

&&

LAT...LON 4438 9244 4445 9244 4446 9243 4446 9224
      4444 9221 4442 9209 4449 9206 4427 9153
      4398 9220 4428 9256 4436 9256
TIME...MOT...LOC 0526Z 309DEG 39KT 4434 9204 4419 9226
WIND...HAIL 60MPH 1.00IN

$$

HALBACH

661 
WWUS53 KARX 310539
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1239 AM CDT SUN JUL 31 2011

MNC109-157-169-WIC011-310600-
/O.CON.KARX.SV.W.0085.000000T0000Z-110731T0600Z/
OLMSTED MN-WABASHA MN-WINONA MN-BUFFALO WI-
1239 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BUFFALO...NORTHWESTERN WINONA...WABASHA AND NORTHEASTERN OLMSTED
COUNTIES UNTIL 100 AM CDT...

TRAINED WEATHER SPOTTERS REPORTED NUMEROUS TREES DOWN IN PIERCE 
COUNTY WITH A LINE OF SEVERE THUNDERSTORMS.

AT 1234 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ALMA TO
ELGIN...MOVING SOUTHEAST AT 40 MPH. THESE STORMS CAN PRODUCE DAMAGING
WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BUFFALO AROUND 1245 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

&&

LAT...LON 4439 9220 4442 9209 4449 9206 4427 9153
      4398 9220 4420 9247
TIME...MOT...LOC 0539Z 310DEG 34KT 4429 9187 4413 9218
WIND...HAIL 60MPH <.50IN

$$

HALBACH

314 
WWUS53 KARX 310549
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1249 AM CDT SUN JUL 31 2011

MNC109-157-169-WIC011-310600-
/O.CON.KARX.SV.W.0085.000000T0000Z-110731T0600Z/
OLMSTED MN-WABASHA MN-WINONA MN-BUFFALO WI-
1249 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BUFFALO...NORTHWESTERN WINONA...EASTERN WABASHA AND NORTHEASTERN
OLMSTED COUNTIES UNTIL 100 AM CDT...

AT 1244 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ALMA TO
ELGIN...MOVING SOUTHEAST AT 35 MPH. THESE STORMS CAN PRODUCE DAMAGING
WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  RURAL NORTHWESTERN WINONA COUNTY AT 100 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

&&

LAT...LON 4416 9242 4445 9195 4427 9153 4398 9220
TIME...MOT...LOC 0549Z 309DEG 31KT 4429 9176 4409 9215
WIND...HAIL 60MPH <.50IN

$$

HALBACH

640 
WWUS53 KARX 310559
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1259 AM CDT SUN JUL 31 2011

MNC109-157-169-WIC011-310609-
/O.EXP.KARX.SV.W.0085.000000T0000Z-110731T0600Z/
OLMSTED MN-WABASHA MN-WINONA MN-BUFFALO WI-
1259 AM CDT SUN JUL 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BUFFALO...
NORTHWESTERN WINONA...EASTERN WABASHA AND NORTHEASTERN OLMSTED
COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS. HOWEVER...THE LINE OF STORMS REMAINS STRONG AND COULD 
PRODUCE GUSTY WINDS...IN ADDITION TO LIGHTNING AND HEAVY RAIN.

LAT...LON 4416 9242 4445 9195 4427 9153 4398 9220
TIME...MOT...LOC 0559Z 309DEG 31KT 4423 9167 4404 9206

$$

HALBACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:49 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.