Alert archive / Wisconsin / Tornado Warnings in 2026

Tornado Warning 3, NWS La Crosse, WI

April 13, 2026Trempealeau County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Apr 13, 2026, 6:21 PM CDT for Trempealeau County, Wisconsin. It was in force for 24 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: Apr 13, 2026, 6:21 PM CDT (23:21 UTC)
Expired: Apr 13, 2026, 6:45 PM CDT
In force: 24 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Trempealeau County, WI

The radar

The La Crosse radar (KARX), 83 km from the middle of the area, began a volume at 23:21 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
Apr 13, 6:34 PM CDT	HAIL 1	Strum, WI
Apr 13, 6:35 PM CDT	HAIL 1.75	4 Ene Strum, WI
Apr 13, 6:41 PM CDT	HAIL 1.75	Osseo, 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
Apr 13, 3:11 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 182 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: 8 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

964 
WFUS53 KARX 132321
TORARX
WIC121-132345-
/O.NEW.KARX.TO.W.0003.260413T2321Z-260413T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
621 PM CDT Mon Apr 13 2026

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Northern Trempealeau County in west central Wisconsin...

* Until 645 PM CDT.

* At 620 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Strum, or 14 miles east of Mondovi, moving east at
  25 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Osseo around 625 PM CDT.

Other locations impacted by this tornadic thunderstorm include Eleva.

This includes Interstate 94 between mile markers 88 and 91.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4459 9117 4453 9117 4448 9153 4460 9153
      4460 9143
TIME...MOT...LOC 2320Z 264DEG 21KT 4458 9137 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Naylor

2 follow-up statements

065 
WWUS53 KARX 132326
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
626 PM CDT Mon Apr 13 2026

WIC121-132345-
/O.CON.KARX.TO.W.0003.000000T0000Z-260413T2345Z/
Trempealeau WI-
626 PM CDT Mon Apr 13 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN TREMPEALEAU COUNTY...

At 625 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Strum, or 15 miles north of Whitehall, moving east
at 25 mph.

HAZARD...Tornado and ping pong ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Osseo around 630 PM CDT.

Other locations impacted by this tornadic thunderstorm include Eleva.

This includes Interstate 94 between mile markers 88 and 91.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4459 9117 4453 9117 4449 9146 4460 9148
TIME...MOT...LOC 2325Z 264DEG 21KT 4458 9133 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN

$$

Naylor

851 
WWUS53 KARX 132334
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
634 PM CDT Mon Apr 13 2026

WIC121-132345-
/O.CON.KARX.TO.W.0003.000000T0000Z-260413T2345Z/
Trempealeau WI-
634 PM CDT Mon Apr 13 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN TREMPEALEAU COUNTY...

At 634 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Osseo, or 15 miles north of Whitehall, moving east
at 25 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Osseo around 640 PM CDT.

This includes Interstate 94 between mile markers 88 and 91.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4459 9117 4453 9117 4451 9135 4459 9140
TIME...MOT...LOC 2334Z 264DEG 21KT 4459 9126 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Naylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 10:28 PM CDT	Flood Watch	ARX	Jackson, Monroe	4 min
Apr 12, 10:33 PM CDT	River Flood Watch	ARX	Jackson	23 hr
Apr 13, 2:23 AM CDT	Flood Watch	ARX	Adams, Buffalo, Clark, Jackson, Juneau, La Crosse and 5 more	24 hr
Apr 13, 11:14 AM CDT	River Flood Watch	ARX	La Crosse, Trempealeau	18 hr
Apr 13, 11:16 AM CDT	River Flood Watch	ARX	Juneau	10 hr
Apr 13, 11:23 AM CDT	River Flood Warning	ARX	Adams, Juneau	6 days
Apr 13, 3:19 PM CDT	Special Weather Statement	ARX	Adams	26 min
Apr 13, 4:43 PM CDT	Severe Thunderstorm Warning	ARX	Clark	17 min
Apr 13, 4:52 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	1 min
Apr 13, 4:55 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	20 min
Apr 13, 5:03 PM CDT	Severe Thunderstorm Warning	ARX	Clark	42 min
Apr 13, 5:36 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	54 min
Apr 13, 5:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Clark	24 min
Apr 13, 5:50 PM CDT	Tornado Warning Tornado observed	ARX	Taylor	11 min
Apr 13, 5:56 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	64 min
Apr 13, 6:14 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	42 min
Apr 13, 6:20 PM CDT	Tornado Warning Tornado observed	ARX	Taylor	20 min
Apr 13, 6:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Jackson	33 min
Apr 13, 6:49 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	71 min
Apr 13, 6:53 PM CDT	Severe Thunderstorm Warning	ARX	Clark	67 min

Nearby

Tornado Warnings in Wisconsin, 2026 Every tornado warning in 2026 Tornadoes in 2026

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.