Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS La Crosse, WI

June 17, 2021Winona County, Minnesota; Buffalo County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 17, 2021, 8:27 PM CDT for Winona County, Minnesota; Buffalo County, Wisconsin. It was in force for 48 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: Jun 17, 2021, 8:27 PM CDT (01:27 UTC)
Expired: Jun 17, 2021, 9:15 PM CDT
In force: 48 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 2.5 in
Wind: 50.0 mph

Counties Winona County, MN, Buffalo County, WI

The radar

The La Crosse radar (KARX), 61 km from the middle of the area, began a volume at 01:31 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

Time	Report	Where	Remark
Jun 17, 8:48 PM CDT	HAIL 1.75	Buffalo, WI	TIME ESTIMATED.
Jun 17, 8:55 PM CDT	HAIL 2.5	Cochrane, WI
Jun 17, 9:00 PM CDT	HAIL 2.5	1 N Buffalo, WI

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.

Issued	Product	Office	Lasted
Jun 17, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.5 hours before the alert went out and 164 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: 61 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1555 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

536 
WUUS53 KARX 180127
SVRARX
MNC169-WIC011-180215-
/O.NEW.KARX.SV.W.0032.210618T0127Z-210618T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
827 PM CDT Thu Jun 17 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Northwestern Winona County in southeastern Minnesota...
  Southern Buffalo County in west central Wisconsin...

* Until 915 PM CDT.

* At 826 PM CDT, a severe thunderstorm was located near Kellogg, or
  near Wabasha, moving east at 45 mph.

  HAZARD...Tennis ball size hail.

  SOURCE...Trained weather spotters.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* This severe thunderstorm will be near...
  Alma and Buffalo City around 840 PM CDT.
  Buffalo around 845 PM CDT.
  Fountain City around 855 PM CDT.

Other locations impacted by this severe thunderstorm include
Waumandee, Czechville, Merrick State Park, Highway 95 And County G,
Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0126Z 283DEG 39KT 4430 9210 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

6 follow-up statements

464 
WWUS53 KARX 180133
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
833 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
833 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 833 PM CDT, a severe thunderstorm was located over Kellogg, or
near Alma, moving east at 45 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Buffalo and Buffalo City around 845 PM CDT.
  Fountain City around 855 PM CDT.

Other locations impacted by this severe thunderstorm include
Waumandee, Czechville, Merrick State Park, Highway 95 And County G,
Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0133Z 284DEG 37KT 4428 9201 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

746 
WWUS53 KARX 180136
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
836 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
836 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 836 PM CDT, a severe thunderstorm was located over Kellogg, or
near Alma, moving east at 45 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Buffalo and Buffalo City around 845 PM CDT.
  Fountain City around 855 PM CDT.

Other locations impacted by this severe thunderstorm include
Waumandee, Czechville, Merrick State Park, Highway 95 And County G,
Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0136Z 284DEG 37KT 4427 9198 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

218 
WWUS53 KARX 180144
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
844 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
844 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 843 PM CDT, a severe thunderstorm was located over Buffalo City,
or near Alma, moving east at 45 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Fountain City around 855 PM CDT.

Other locations impacted by this severe thunderstorm include
Waumandee, Czechville, Merrick State Park, Highway 95 And County G,
Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0143Z 283DEG 39KT 4425 9187 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

425 
WWUS53 KARX 180150
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
850 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
850 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 849 PM CDT, a severe thunderstorm was located over Buffalo City,
or 9 miles southeast of Alma, moving east at 40 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Fountain City around 900 PM CDT.
  Winona and Goodview around 905 PM CDT.

Other locations impacted by this severe thunderstorm include
Waumandee, Czechville, Merrick State Park, Highway 95 And County G,
Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0149Z 287DEG 35KT 4421 9184 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

653 
WWUS53 KARX 180158
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
858 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
858 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 858 PM CDT, a severe thunderstorm was located near Fountain City,
or 9 miles north of Winona, moving east at 45 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe thunderstorm will remain over mainly rural areas of
northwestern Winona and southern Buffalo Counties, including the
following locations... Waumandee, Czechville, Merrick State Park,
Highway 95 And County G, Lock And Dam 5 A, Dodge and Cream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0158Z 283DEG 39KT 4419 9170 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

870 
WWUS53 KARX 180205
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
905 PM CDT Thu Jun 17 2021

MNC169-WIC011-180215-
/O.CON.KARX.SV.W.0032.000000T0000Z-210618T0215Z/
Winona MN-Buffalo WI-
905 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN WINONA AND SOUTHERN BUFFALO COUNTIES...

At 905 PM CDT, a severe thunderstorm was located near Fountain City,
or near Arcadia, moving east at 45 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

Locations impacted include...
Winona, Alma, Buffalo, Goodview, Buffalo City, Fountain City,
Rollingstone, Dodge, Waumandee, Cochrane, Minnesota City, Minneiska,
Czechville, Merrick State Park, Lock And Dam 5 A, Cream, Highway 88
And County O, Whitman, Bluff Siding and Highway 95 And County G.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4420 9186 4423 9189 4427 9190 4429 9193
      4431 9191 4433 9192 4438 9200 4432 9153
      4425 9153 4421 9160 4418 9160 4417 9161
      4414 9156 4410 9154 4404 9157 4402 9155
      4401 9156 4419 9208
TIME...MOT...LOC 0205Z 288DEG 41KT 4420 9161 

HAIL...2.50IN
WIND...<50MPH
 
$$

JSB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:48 PM CDT	Severe Thunderstorm Warning	ARX	Wabasha	57 min
Jun 17, 8:41 PM CDT	Severe Thunderstorm Warning	ARX	Wabasha	49 min
Jun 17, 9:09 PM CDT	Severe Thunderstorm Warning	ARX	Winona	51 min
Jun 17, 10:22 PM CDT	Severe Thunderstorm Warning	ARX	Wabasha, Winona	53 min
Jun 17, 10:46 PM CDT	Severe Thunderstorm Warning	ARX	Houston, Winona	44 min
Jun 17, 11:14 PM CDT	Severe Thunderstorm Warning	ARX	Houston	25 min
Jun 17, 11:15 PM CDT	Areal Flood Advisory	ARX	Houston, Winona	97 min
Jun 17, 7:24 PM CDT	Severe Thunderstorm Warning	ARX	Clark	40 min
Jun 17, 7:39 PM CDT	Special Weather Statement	ARX	Jackson	36 min
Jun 17, 7:54 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	20 min
Jun 17, 8:52 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Jackson, Trempealeau	38 min
Jun 17, 8:56 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	64 min
Jun 17, 9:23 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Trempealeau	37 min
Jun 17, 9:34 PM CDT	Special Weather Statement	ARX	Clark, Jackson	41 min
Jun 17, 9:58 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Trempealeau	47 min
Jun 17, 11:28 PM CDT	Special Weather Statement	ARX	Juneau, Monroe	47 min
Jun 17, 11:56 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	34 min
Jun 18, 12:26 AM CDT	Special Weather Statement	ARX	Vernon	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021 Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning in 2021

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.