Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS La Crosse, WI

May 25, 2021Buffalo County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 25, 2021, 3:45 PM CDT for Buffalo County, Wisconsin. It was in force for 60 min. 1 report 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: May 25, 2021, 3:45 PM CDT (20:45 UTC)
Expired: May 25, 2021, 4:45 PM CDT
In force: 60 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Buffalo County, WI

The radar

The La Crosse radar (KARX), 90 km from the middle of the area, began a volume at 20:46 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
May 25, 4:08 PM CDT	HAIL 0.7	Nelson, 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
May 25, 2:53 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.8 hours before the alert went out and 305 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: 96 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

399 
WUUS53 KARX 252045
SVRARX
WIC011-252145-
/O.NEW.KARX.SV.W.0017.210525T2045Z-210525T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
345 PM CDT Tue May 25 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Buffalo County in west central Wisconsin...

* Until 445 PM CDT.

* At 345 PM CDT, a severe thunderstorm was located over Pepin, or
  near Wabasha, moving northeast at 45 mph.

  HAZARD...Ping pong 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...
  Wabasha around 350 PM CDT.
  Modena around 410 PM CDT.
  Mondovi around 420 PM CDT.

Other locations impacted by this severe thunderstorm include
Gilmanton, Nelson, Waumandee, Maxville, Montana, Cream and Mondovi
Airfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near the Mississippi River, get away from the water and 
move indoors or inside a vehicle. Do not be caught on the water in a 
thunderstorm.

&&

LAT...LON 4451 9204 4454 9205 4459 9203 4460 9200
      4460 9153 4429 9153 4428 9190 4429 9193
      4431 9191 4433 9192 4436 9196 4438 9203
      4440 9205 4441 9208 4443 9208
TIME...MOT...LOC 2045Z 240DEG 37KT 4440 9216 

HAIL...1.50IN
WIND...60MPH
 
$$

Wetenkamp

2 follow-up statements

093 
WWUS53 KARX 252116
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
416 PM CDT Tue May 25 2021

WIC011-252145-
/O.CON.KARX.SV.W.0017.000000T0000Z-210525T2145Z/
Buffalo WI-
416 PM CDT Tue May 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR BUFFALO COUNTY...

At 416 PM CDT, a severe thunderstorm was located over Modena, or 9
miles southwest of Mondovi, moving east at 35 mph.

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

SOURCE...Radar indicated.

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

This severe storm will be near...
  Mondovi around 430 PM CDT.

Other locations impacted by this severe thunderstorm include
Gilmanton, Nelson, Waumandee, Maxville, Montana, Cream and Mondovi
Airfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4451 9204 4454 9205 4459 9203 4460 9200
      4460 9153 4429 9153 4428 9190 4429 9193
      4431 9191 4433 9192 4436 9196 4438 9203
      4440 9205 4441 9208 4443 9208
TIME...MOT...LOC 2116Z 250DEG 32KT 4446 9179 

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

Wetenkamp

887 
WWUS53 KARX 252133
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
433 PM CDT Tue May 25 2021

WIC011-252145-
/O.CON.KARX.SV.W.0017.000000T0000Z-210525T2145Z/
Buffalo WI-
433 PM CDT Tue May 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHERN BUFFALO COUNTY...

At 431 PM CDT, a severe thunderstorm was located near Mondovi, moving
northeast at 45 mph.

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

SOURCE...Radar indicated. At 427 PM quarter size hail was reported 
         in Nelson.

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
northern Buffalo County, including the following locations...
Gilmanton, Lock And Dam 4, Waumandee, Montana, Herold, Highways 37
And 35 and Tell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4451 9187 4456 9180 4458 9177 4460 9173
      4460 9153 4429 9153 4428 9190 4429 9193
      4431 9191 4433 9192 4436 9196 4443 9190
TIME...MOT...LOC 2131Z 240DEG 37KT 4454 9159 

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

Wetenkamp

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 4:06 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	54 min
May 25, 4:47 PM CDT	Special Weather Statement	ARX	Trempealeau	28 min
May 25, 4:50 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	40 min
May 25, 5:01 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	44 min
May 25, 5:11 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	64 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.