Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS La Crosse, WI

June 17, 2021Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 17, 2021, 8:56 PM CDT for Trempealeau County, Wisconsin. It was in force for 64 min. 4 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, 8:56 PM CDT (01:56 UTC)
Expired: Jun 17, 2021, 10:00 PM CDT
In force: 64 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 2.5 in
Wind: 50.0 mph

County Trempealeau County, WI

The radar

The La Crosse radar (KARX), 36 km from the middle of the area, began a volume at 01:59 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, 9:15 PM CDT	HAIL 1	2 S Arcadia, WI
Jun 17, 9:49 PM CDT	TSTM WND DMG	Centerville, WI	DELAYED REPORT FROM 6/17. NUMEROUS TREES AND TREE BRANCHES DOWN IN TOWN, SOME OF WHICH WENT THROUGH THE ROOFS OF HOMES. CORN FIELDS PUSHED OVER AND SOME DEBRIS BLOWN INTO FIELDS. TIME ESTIMATED FROM RADAR.
Jun 17, 9:59 PM CDT	TSTM WND GST 50	2 Wsw Galesville, WI
Jun 17, 9:59 PM CDT	HAIL 0.75	2 Wsw Galesville, 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, 1.9 hours before the alert went out and 192 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.

873 
WUUS53 KARX 180156
SVRARX
WIC121-180300-
/O.NEW.KARX.SV.W.0035.210618T0156Z-210618T0300Z/

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

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Southern Trempealeau County in west central Wisconsin...

* Until 1000 PM CDT.

* At 856 PM CDT, a severe thunderstorm was located near Buffalo City,
  or 11 miles southeast of Alma, moving east at 35 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...
  Arcadia around 920 PM CDT.
  Galesville around 935 PM CDT.

Other locations impacted by this severe thunderstorm include Highway
95 And County D, Camp Decorah, Beach Corners, Perrot State Park,
Thimble Park, North Creek and Peacock Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4418 9160 4421 9160 4425 9153 4433 9153
      4429 9117 4408 9115 4409 9120 4405 9122
      4407 9127 4406 9128 4407 9131 4403 9134
      4399 9132 4398 9133 4398 9142 4400 9144
      4404 9157 4410 9154 4414 9156 4417 9161
TIME...MOT...LOC 0156Z 286DEG 30KT 4422 9178 

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

JSB

2 follow-up statements

994 
WWUS53 KARX 180203
SVSARX

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

WIC121-180300-
/O.CON.KARX.SV.W.0035.000000T0000Z-210618T0300Z/
Trempealeau WI-
903 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHERN TREMPEALEAU COUNTY...

At 903 PM CDT, a severe thunderstorm was located near Fountain City,
or 8 miles west of Arcadia, 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...
  Arcadia around 915 PM CDT.
  Galesville around 930 PM CDT.

Other locations impacted by this severe thunderstorm include Highway
95 And County D, Camp Decorah, Beach Corners, Perrot State Park,
Thimble Park, North Creek and Peacock Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4418 9160 4421 9160 4425 9153 4433 9153
      4429 9117 4408 9115 4409 9120 4405 9122
      4407 9127 4406 9128 4407 9131 4403 9134
      4399 9132 4398 9133 4398 9142 4400 9144
      4404 9157 4410 9154 4414 9156 4417 9161
TIME...MOT...LOC 0203Z 279DEG 34KT 4422 9167 

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

JSB

185 
WWUS53 KARX 180212
SVSARX

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

WIC121-180300-
/O.CON.KARX.SV.W.0035.000000T0000Z-210618T0300Z/
Trempealeau WI-
912 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHERN TREMPEALEAU COUNTY...

At 912 PM CDT, a severe thunderstorm was located near Arcadia, moving
east at 35 mph.

HAZARD...Two inch 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...
  Galesville around 935 PM CDT.

Other locations impacted by this severe thunderstorm include Highway
95 And County D, Camp Decorah, Beach Corners, Perrot State Park,
Thimble Park, North Creek and Peacock Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4418 9160 4421 9160 4425 9153 4433 9153
      4429 9117 4408 9115 4409 9120 4405 9122
      4407 9127 4406 9128 4407 9131 4403 9134
      4399 9132 4398 9133 4398 9142 4400 9144
      4404 9157 4410 9154 4414 9156 4417 9161
TIME...MOT...LOC 0212Z 286DEG 30KT 4420 9156 

HAIL...2.00IN
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, 7:24 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, 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, 10:22 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	53 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

Nearby

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.