Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS La Crosse, WI

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

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 17, 2021, 10:22 PM CDT for Buffalo County, Trempealeau County, Wisconsin; Wabasha County, Winona County, Minnesota. It was in force for 53 min. 6 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, 10:22 PM CDT (03:22 UTC)
Expired: Jun 17, 2021, 11:15 PM CDT
In force: 53 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

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

The radar

The La Crosse radar (KARX), 46 km from the middle of the area, began a volume at 03:24 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
Jun 17, 10:22 PM CDT	HAIL 1.75	Goodview, MN
Jun 17, 10:30 PM CDT	HAIL 2	2 W Centerville, WI
Jun 17, 10:31 PM CDT	HAIL 2.75	Goodview, MN
Jun 17, 10:40 PM CDT	TSTM WND GST 60	2 Wsw Galesville, WI
Jun 17, 10:42 PM CDT	HAIL 1	3 S Winona, MN
Jun 17, 10:53 PM CDT	HAIL 1.75	Trempealeau, 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, 10:01 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.4 hours before the alert went out and 178 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.

915 
WUUS53 KARX 180322
SVRARX
MNC157-169-WIC011-121-180415-
/O.NEW.KARX.SV.W.0039.210618T0322Z-210618T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1022 PM CDT Thu Jun 17 2021

The National Weather Service in La Crosse has issued a

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

* Until 1115 PM CDT.

* At 1022 PM CDT, a severe thunderstorm was located over Plainview,
  or 13 miles south of Wabasha, moving east at 50 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Buffalo and Altura around 1035 PM CDT.
  Lewiston and Rollingstone around 1040 PM CDT.
  Fountain City and Stockton around 1045 PM CDT.
  Winona and Goodview around 1050 PM CDT.
  Trempealeau around 1105 PM CDT.

Other locations impacted by this severe thunderstorm include
Czechville, Merrick State Park, Lock And Dam 5 A, Camp Decorah,
Dodge, Perrot State Park and Ridgeway.

This includes Interstate 90 in Minnesota between mile markers 248 and
264.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4432 9222 4411 9117 4406 9125 4407 9127
      4406 9128 4407 9131 4403 9134 4401 9134
      4398 9138 4398 9142 4397 9141 4385 9160
      4407 9208 4411 9208 4411 9217 4420 9234
TIME...MOT...LOC 0322Z 292DEG 45KT 4418 9213 

HAIL...1.75IN
WIND...60MPH
 
$$

JSB

2 follow-up statements

925 
WWUS53 KARX 180341
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1041 PM CDT Thu Jun 17 2021

MNC157-180350-
/O.CAN.KARX.SV.W.0039.000000T0000Z-210618T0415Z/
Wabasha MN-
1041 PM CDT Thu Jun 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WABASHA COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
southeastern Minnesota...and west central Wisconsin.

LAT...LON 4420 9163 4411 9117 4406 9125 4407 9127
      4406 9128 4407 9131 4403 9134 4401 9134
      4398 9138 4398 9142 4397 9141 4385 9160
      4407 9208 4419 9208
TIME...MOT...LOC 0340Z 291DEG 30KT 4402 9163 

$$

MNC169-WIC011-121-180415-
/O.CON.KARX.SV.W.0039.000000T0000Z-210618T0415Z/
Winona MN-Buffalo WI-Trempealeau WI-
1041 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR WINONA...SOUTHEASTERN BUFFALO AND SOUTHERN TREMPEALEAU
COUNTIES...

At 1040 PM CDT, a severe thunderstorm was located over Winona, moving
east at 35 mph.

This is a very dangerous storm.

HAZARD...Baseball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters reported baseball size hail in 
         Goodview along with street flooding.

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

This severe storm will be near...
  Trempealeau around 1055 PM CDT.

Other locations impacted by this severe thunderstorm include
Czechville, Merrick State Park, Lock And Dam 5 A, Camp Decorah,
Dodge, Elba and Perrot State Park.

This includes Interstate 90 in Minnesota between mile markers 248 and
264.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. 

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4420 9163 4411 9117 4406 9125 4407 9127
      4406 9128 4407 9131 4403 9134 4401 9134
      4398 9138 4398 9142 4397 9141 4385 9160
      4407 9208 4419 9208
TIME...MOT...LOC 0340Z 291DEG 30KT 4402 9163 

HAIL...2.75IN
WIND...60MPH
 
$$

Kurz

286 
WWUS53 KARX 180401
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1101 PM CDT Thu Jun 17 2021

WIC011-180410-
/O.CAN.KARX.SV.W.0039.000000T0000Z-210618T0415Z/
Buffalo WI-
1101 PM CDT Thu Jun 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUFFALO COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
southeastern Minnesota...and west central Wisconsin.

LAT...LON 4411 9117 4406 9125 4407 9127 4406 9128
      4407 9131 4403 9134 4401 9134 4398 9138
      4398 9142 4397 9141 4385 9160 4389 9169
      4413 9129
TIME...MOT...LOC 0400Z 292DEG 45KT 4392 9129 

$$

MNC169-WIC121-180415-
/O.CON.KARX.SV.W.0039.000000T0000Z-210618T0415Z/
Winona MN-Trempealeau WI-
1101 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR SOUTHEASTERN WINONA AND SOUTHEASTERN TREMPEALEAU COUNTIES...

At 1100 PM CDT, a severe thunderstorm was located over Brice Prairie,
or near La Crescent, moving east at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southeastern Winona and southeastern Trempealeau Counties, including
the following locations... Witoka, Ridgeway, Camp Decorah and Lock
And Dam 6.

This includes Interstate 90 in Minnesota between mile markers 257 and
264.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4411 9117 4406 9125 4407 9127 4406 9128
      4407 9131 4403 9134 4401 9134 4398 9138
      4398 9142 4397 9141 4385 9160 4389 9169
      4413 9129
TIME...MOT...LOC 0400Z 292DEG 45KT 4392 9129 

HAIL...1.00IN
WIND...60MPH
 
$$

Kurz

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 8:27 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	48 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, 9:09 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	51 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, 10:46 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Monroe, Trempealeau	44 min
Jun 17, 11:14 PM CDT	Severe Thunderstorm Warning	ARX	Vernon	25 min
Jun 17, 11:15 PM CDT	Areal Flood Advisory	ARX	Buffalo, La Crosse, Monroe, Trempealeau	97 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
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

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Severe Thunderstorm Warnings in Minnesota, 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.