Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS La Crosse, WI

June 17, 2021Jackson County, Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 17, 2021, 9:23 PM CDT for Jackson County, Trempealeau County, Wisconsin. It was in force for 37 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, 9:23 PM CDT (02:23 UTC)
Expired
Jun 17, 2021, 10:00 PM CDT
In force
37 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Jackson County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 34 km from the middle of the area, began a volume at 02:25 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
Jun 17, 9:49 PM CDTTSTM WND DMGCenterville, WIDELAYED 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 CDTTSTM WND GST 502 Wsw Galesville, WI
Jun 17, 9:59 PM CDTHAIL 0.752 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.

IssuedProductOfficeLasted
Jun 17, 3:50 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.4 hours before the alert went out and 203 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 2021-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.19395878Sfc1 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
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.

007 
WUUS53 KARX 180223
SVRARX
WIC053-121-180300-
/O.NEW.KARX.SV.W.0037.210618T0223Z-210618T0300Z/

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

The National Weather Service in La Crosse has issued a

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

* Until 1000 PM CDT.

* At 923 PM CDT, a severe thunderstorm was located near Galesville,
  or 10 miles southeast of Arcadia, moving east at 45 mph.

  HAZARD...Quarter size hail.

  SOURCE...Trained weather spotters.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  North Bend around 940 PM CDT.

Other locations impacted by this severe thunderstorm include
Franklin, Highway 95 And County D, Melrose, Shamrock, Beach Corners,
Perrot State Park and Thimble Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4416 9076 4416 9091 4413 9098 4407 9097
      4407 9115 4409 9119 4405 9122 4407 9127
      4407 9131 4403 9134 4399 9133 4403 9156
      4404 9157 4410 9154 4414 9156 4417 9161
      4421 9160 4425 9153 4433 9153 4423 9074
TIME...MOT...LOC 0223Z 283DEG 39KT 4415 9134 

HAIL...1.00IN
WIND...<50MPH
 
$$

JSB
2 follow-up statements
919 
WWUS53 KARX 180233
SVSARX

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

WIC053-121-180300-
/O.CON.KARX.SV.W.0037.000000T0000Z-210618T0300Z/
Jackson WI-Trempealeau WI-
933 PM CDT Thu Jun 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHWESTERN JACKSON AND SOUTHERN TREMPEALEAU COUNTIES...

At 933 PM CDT, a severe thunderstorm was located 7 miles south of
Blair, or 12 miles south of Whitehall, moving east at 40 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  North Bend around 945 PM CDT.

Other locations impacted by this severe thunderstorm include
Franklin, Highway 95 And County D, Melrose, Shamrock, Beach Corners,
Perrot State Park and Thimble Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4416 9076 4416 9091 4413 9098 4407 9097
      4407 9115 4409 9119 4405 9122 4407 9127
      4407 9131 4403 9134 4399 9133 4403 9156
      4404 9157 4410 9154 4414 9156 4417 9161
      4421 9160 4425 9153 4433 9153 4423 9074
TIME...MOT...LOC 0233Z 272DEG 33KT 4419 9125 

HAIL...1.00IN
WIND...<50MPH
 
$$

JSB
181 
WWUS53 KARX 180247
SVSARX

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

WIC053-180257-
/O.CAN.KARX.SV.W.0037.000000T0000Z-210618T0300Z/
Jackson WI-
947 PM CDT Thu Jun 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JACKSON 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 1000 PM CDT for
west central Wisconsin.

LAT...LON 4418 9160 4421 9160 4425 9153 4433 9153
      4428 9117 4425 9117 4425 9115 4408 9115
      4409 9120 4405 9122 4407 9127 4407 9131
      4403 9134 4399 9133 4403 9156 4404 9157
      4410 9154 4414 9156 4417 9161
TIME...MOT...LOC 0247Z 268DEG 43KT 4412 9146 

$$

WIC121-180300-
/O.CON.KARX.SV.W.0037.000000T0000Z-210618T0300Z/
Trempealeau WI-
947 PM CDT Thu Jun 17 2021

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

At 947 PM CDT, a severe thunderstorm was located near Galesville, or
9 miles south of Arcadia, moving east at 50 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Galesville around 955 PM CDT.

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

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
      4428 9117 4425 9117 4425 9115 4408 9115
      4409 9120 4405 9122 4407 9127 4407 9131
      4403 9134 4399 9133 4403 9156 4404 9157
      4410 9154 4414 9156 4417 9161
TIME...MOT...LOC 0247Z 268DEG 43KT 4412 9146 

HAIL...1.00IN
WIND...<50MPH
 
$$

JSB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 7:24 PM CDTSevere Thunderstorm WarningARXClark40 min
Jun 17, 7:39 PM CDTSpecial Weather StatementARXJackson36 min
Jun 17, 7:54 PM CDTSevere Thunderstorm WarningARXClark, Jackson20 min
Jun 17, 8:27 PM CDTSevere Thunderstorm WarningARXBuffalo48 min
Jun 17, 8:52 PM CDTSevere Thunderstorm WarningARXBuffalo, Jackson, Trempealeau38 min
Jun 17, 8:56 PM CDTSevere Thunderstorm WarningARXTrempealeau64 min
Jun 17, 9:09 PM CDTSevere Thunderstorm WarningARXBuffalo51 min
Jun 17, 9:34 PM CDTSpecial Weather StatementARXClark, Jackson41 min
Jun 17, 9:58 PM CDTSevere Thunderstorm WarningARXLa Crosse, Trempealeau47 min
Jun 17, 10:22 PM CDTSevere Thunderstorm WarningARXBuffalo, Trempealeau53 min
Jun 17, 10:46 PM CDTSevere Thunderstorm WarningARXLa Crosse, Monroe, Trempealeau44 min
Jun 17, 11:14 PM CDTSevere Thunderstorm WarningARXVernon25 min
Jun 17, 11:15 PM CDTAreal Flood AdvisoryARXBuffalo, La Crosse, Monroe, Trempealeau97 min
Jun 17, 11:28 PM CDTSpecial Weather StatementARXJuneau, Monroe47 min
Jun 17, 11:56 PM CDTSevere Thunderstorm WarningARXAdams, Juneau34 min
Jun 18, 12:26 AM CDTSpecial Weather StatementARXVernon34 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021Every 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.