Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 24, NWS La Crosse, WI

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

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 17, 2021, 4:10 AM CDT for Buffalo County, Trempealeau County, Wisconsin; Winona County, Minnesota. It was in force for 17 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: Jun 17, 2021, 4:10 AM CDT (09:10 UTC)
Expired: Jun 17, 2021, 4:27 AM CDT
In force: 17 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

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

The radar

The La Crosse radar (KARX), 31 km from the middle of the area, began a volume at 09:13 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, 9.2 hours before the alert went out and 194 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2464 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

747 
WUUS53 KARX 170910
SVRARX
MNC169-WIC011-121-170945-
/O.NEW.KARX.SV.W.0024.210617T0910Z-210617T0945Z/

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

The National Weather Service in La Crosse has issued a

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

* Until 445 AM CDT.

* At 410 AM CDT, a severe thunderstorm was located over Goodview, or
  near Winona, moving southeast at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Winona around 415 AM CDT.
  Trempealeau around 435 AM CDT.
  Dakota around 440 AM CDT.

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

This includes Interstate 90 in Minnesota between mile markers 263 and
271.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4419 9185 4407 9127 4406 9128 4407 9131
      4405 9133 4404 9133 4403 9134 4402 9134
      4399 9133 4398 9142 4394 9136 4392 9136
      4387 9140 4406 9192
TIME...MOT...LOC 0910Z 293DEG 37KT 4408 9176 

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

DAS

1 follow-up statement

743 
WWUS53 KARX 170927
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
427 AM CDT Thu Jun 17 2021

MNC169-WIC011-121-170937-
/O.CAN.KARX.SV.W.0024.000000T0000Z-210617T0945Z/
Winona MN-Buffalo WI-Trempealeau WI-
427 AM CDT Thu Jun 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WINONA...SOUTHEASTERN
BUFFALO AND SOUTHWESTERN TREMPEALEAU COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail is
still possible with this thunderstorm.

LAT...LON 4419 9185 4407 9127 4406 9128 4407 9131
      4405 9133 4404 9133 4403 9134 4402 9134
      4399 9133 4398 9142 4394 9136 4392 9136
      4387 9140 4406 9192
TIME...MOT...LOC 0926Z 293DEG 37KT 4403 9159 

$$

DAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 3:34 AM CDT	Special Weather Statement	ARX	Buffalo, Trempealeau	56 min
Jun 17, 5:36 AM CDT	Special Weather Statement	ARX	Grant	24 min
Jun 17, 5:42 AM CDT	Severe Thunderstorm Warning	ARX	Juneau, Monroe, Richland, Vernon	33 min
Jun 17, 3:36 PM CDT	Special Weather Statement	ARX	Adams	24 min
Jun 17, 5:56 PM CDT	Special Weather Statement	ARX	Trempealeau	34 min
Jun 17, 6:20 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	25 min
Jun 17, 6:43 PM CDT	Severe Thunderstorm Warning	ARX	Clark	47 min
Jun 17, 6:50 PM CDT	Special Weather Statement	ARX	Trempealeau	25 min
Jun 17, 6:59 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Jackson, Trempealeau	46 min
Jun 17, 2:12 AM CDT	Special Weather Statement	ARX	Mower, Olmsted	63 min
Jun 17, 3:08 AM CDT	Special Weather Statement	ARX	Mower	67 min
Jun 17, 4:26 AM CDT	Special Weather Statement	ARX	Fillmore	64 min
Jun 17, 3:26 PM CDT	Special Weather Statement	ARX	Fillmore, Winona	34 min
Jun 17, 4:07 PM CDT	Special Weather Statement	ARX	Winona	23 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.