Alert archive / Wisconsin / Tornado Warnings in 2026

Tornado Warning 59, NWS La Crosse, WI

September 4, 2026Clark County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Sep 4, 2026, 6:29 PM CDT for Clark County, Wisconsin. It was in force for 14 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: Sep 4, 2026, 6:29 PM CDT (23:29 UTC)
Expired: Sep 4, 2026, 6:43 PM CDT
In force: 14 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Clark County, WI

The radar

The La Crosse radar (KARX), 110 km from the middle of the area, began a volume at 23:32 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
Sep 4, 6:38 PM CDT	FUNNEL CLOUD	6 N Chili, WI	Report of a funnel cloud southwest of Spencer near Veefkind.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 253 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: 3194 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

408 
WFUS53 KARX 042329
TORARX
WIC019-050000-
/O.NEW.KARX.TO.W.0059.260904T2329Z-260905T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
629 PM CDT Fri Sep 4 2026

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  East central Clark County in central Wisconsin...

* Until 700 PM CDT.

* At 629 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles southeast of Loyal, or 11 miles northeast of
  Neillsville, moving southeast at 10 mph.

  HAZARD...Tornado.

  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 tornadic thunderstorm will remain over mainly rural areas of
  east central Clark County, including the following locations...
  Chili Corners, Chili, and Veefkind.

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 4462 9049 4472 9043 4471 9032 4454 9032
TIME...MOT...LOC 2329Z 315DEG 7KT 4466 9039 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Naylor

2 follow-up statements

629 
WWUS53 KARX 042338
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
638 PM CDT Fri Sep 4 2026

WIC019-050000-
/O.CON.KARX.TO.W.0059.000000T0000Z-260905T0000Z/
Clark WI-
638 PM CDT Fri Sep 4 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR EAST
CENTRAL CLARK COUNTY...

At 637 PM CDT, a severe thunderstorm capable of producing a tornado
was located 8 miles south of Spencer, or 12 miles northeast of
Neillsville, moving southeast at 10 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation. There was a spotter report of a 
         funnel cloud near Veefkind. 

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.

Locations impacted include...
Chili Corners and Chili.

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 4460 9045 4468 9040 4467 9032 4454 9032
TIME...MOT...LOC 2337Z 313DEG 9KT 4464 9036 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Naylor

838 
WWUS53 KARX 042343
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
643 PM CDT Fri Sep 4 2026

WIC019-042353-
/O.CAN.KARX.TO.W.0059.000000T0000Z-260905T0000Z/
Clark WI-
643 PM CDT Fri Sep 4 2026

...THE TORNADO WARNING FOR EAST CENTRAL CLARK COUNTY IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However, gusty winds are
still possible with this thunderstorm.

&&

LAT...LON 4460 9045 4468 9040 4467 9032 4454 9032
TIME...MOT...LOC 2342Z 315DEG 7KT 4463 9035 

$$

Naylor

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this tornado warning went out at Sep 4, 12:55 PM CDT, 5 hours 34 minutes earlier. Its key messages:

Shower and storm chances persist through the holiday weekend.
Hot temperatures linger this afternoon, mainly across northeast Iowa and southwest Wisconsin, before trending slightly cooler Sunday into Monday.
A low pressure system is expected to move through the Upper Midwest next week, brining the potential for showers and storms Tuesday into Wednesday (50-70%).

Area forecast discussion, Sep 4, 12:55 PM CDT, 5 hours 34 minutes before

Area Forecast Discussion
National Weather Service La Crosse WI
1255 PM CDT Fri Sep 4 2026

.KEY MESSAGES...

- Shower and storm chances persist through the holiday weekend.

- Hot temperatures linger this afternoon, mainly across
  northeast Iowa and southwest Wisconsin, before trending
  slightly cooler Sunday into Monday.

- A low pressure system is expected to move through the Upper
  Midwest next week, brining the potential for showers and
  storms Tuesday into Wednesday (50-70%).

&&

.DISCUSSION...
Issued at 1254 PM CDT Fri Sep 4 2026

Tonight - Monday: Persistent Shower/Storm Chances, Trending Slightly
Cooler

A quasi-stationary boundary remains draped across the Upper
Mississippi River Valley through the rest of the afternoon and
into tonight, mainly south of I-90. While forcing along the
boundary is fairly weak, some showers and storms have been able
to develop with additional development possible (10-30%) into
this evening. Plenty of instability is present for these storms
given the hot and humid conditions that remain across the region
(2000-3000 J/kg of MUCAPE), so thinking some updrafts could be
on the perkier side. Very little in the way of wind shear is
present across the region though (0-6km bulk shear of 20kts or
less), so storms will struggle to sustain themselves leading to
low potential for severe hazards. However, some small hail and
gusty winds are possible under the stronger updrafts.

Overnight, anticipating areas of fog to develop as low level
ridging begins to build into the region. The soupy conditions
and diminishing winds within the stabilizing atmosphere should
result in conditions primed for fog development. Would expect
fog to be dense at times with the 04.12z HREF suggesting 20-40%
probabilities for visibilities less than 1/4mi. Fog will
dissipate through around 9-10am Saturday morning.

Heading into the holiday weekend, upper level ridging builds
across the central United States allowing for northwest upper
level flow to set up across the Upper Mississippi River Valley.
A couple shortwave impulses are progged to move through the
region within the mean flow, sparking periods of showers and
storms (30-50%), most favorable Saturday night into Sunday and
west of the Mississippi River. Strong to severe storms appear
unlikely though as upper level winds, and by association the
wind shear, should be rather light. Shower/storm coverage may
also end up being rather scattered given low level dry air in
place, resulting in a cap across the region.

High pressure sinking southward across the Great Lakes through
the weekend should also force the boundary that's been over the
region through the better part of the week to southward,
allowing for a slight and brief cooling trend Sunday into
Monday. Temperatures will still be above normal, though only by
5-10 degrees rather than the 10-15 degrees we've seen this past
week. Currently expecting highs to top out in the upper 70s to
low 80s with the 25th-75th percentiles of ensemble guidance
highlighting this as the most favorable range. This trend will
be short-lived though as temperatures begin to warm again
through mid-week.

Tuesday - Wednesday: Low Pressure System and Shower/Storm Chances

Greater potential for showers and storms area-wide comes
Tuesday into Wednesday when the longwave trough currently
situated over the Pacific Northwest ejects eastward and deepens
a surface low across the northern Great Plains. An associated
cold front is expected to move through the Upper Midwest as the
low shifts eastward across southern Canada which will be the
main focus for these shower and storm chances.

Many of the members of the various ensemble suites
(GEFS/ENS/GEPS) do highlight precipitation moving through the
region with this cold front, though there is some variation
regarding timing and location. Currently, rainfall probabilities
in the 04.13z NBM sit around 50-70% across our area, though are
highest north of our area where 1000-500hPa QG convergence is
maximized. There is also the potential influence of dry low
level air across much of the Upper Mississippi River Valley as
suggested by the 04.12z GFS solution which would limit
shower/storm development along the cold front and could result
in lower probabilities. Regardless, some storms that develop
could be on the stronger side given 35-40kts of 0-6km bulk
shear, MLCAPE on the order of 750-1250 J/kg, and AI/ML guidance
highlighting some low potential for strong storms.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1222 PM CDT Fri Sep 4 2026

Line of TS south of LSE continues to slowly exit the area to the
southeast and will remain outside the 10 mile radius of both TAF
sites. Strong signal for at least IFR stratus/fog to spread
southwest overnight into early Saturday so have retained IFR
mentions at both RST/LSE and, considering we are still a couple
TAF cycles away, have been conservative with timing. VFR
conditions will very likely (80%) return by the end of the
period.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...Heat Advisory until 7 PM CDT this evening for WIZ061.
MN...None.
IA...Heat Advisory until 7 PM CDT this evening for IAZ029-030.

&&

DISCUSSION...Falkinham
AVIATION...Ferguson

Hazardous weather outlook, Sep 4, 1:03 PM CDT, 5 hours 26 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
103 PM CDT Fri Sep 4 2026

IAZ018-019-029-030-WIZ054-055-061-052215-
Floyd-Chickasaw-Fayette-Clayton-Crawford-Richland-Grant-
103 PM CDT Fri Sep 4 2026

This Hazardous Weather Outlook is for portions of north central
Iowa...northeast Iowa and southwest Wisconsin.

.DAY ONE...This Afternoon and Tonight

Maximum heat indices from the upper 90s to low 100s are expected
this afternoon.

Strong thunderstorms are possible through this afternoon.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

IAZ008>011-MNZ079-086>088-094>096-WIZ017-029-032>034-041>044-053-
052215-
Mitchell-Howard-Winneshiek-Allamakee-Wabasha-Dodge-Olmsted-Winona-
Mower-Fillmore-Houston-Taylor-Clark-Buffalo-Trempealeau-Jackson-
La Crosse-Monroe-Juneau-Adams-Vernon-
103 PM CDT Fri Sep 4 2026

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...This Afternoon and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

In the hours before

Special weather statement, Sep 4, 3:04 PM CDT, 3 hours 25 minutes before

Special Weather Statement
National Weather Service La Crosse WI
304 PM CDT Fri Sep 4 2026

IAZ010-011-042045-
Winneshiek IA-Allamakee IA-
304 PM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN ALLAMAKEE AND
SOUTHERN WINNESHIEK COUNTIES THROUGH 345 PM CDT...

At 304 PM CDT, Doppler radar was tracking a strong thunderstorm near
Ossian, or 7 miles southeast of Decorah, moving east at 30 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This strong thunderstorm will be near...
  Waukon around 320 PM CDT.

Other locations impacted by this storm include County Roads A 52 And
W 60, County Roads X 16 And B 38, State Road 76 And County X 16,
Festina, Nordness, Lake Meyer County Park, Ludlow, Glenwood Church,
County Road W 46 And Centennial Road, and County Roads X 16 And W 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4309 9200 4327 9202 4335 9143 4308 9143
      4308 9148
TIME...MOT...LOC 2004Z 273DEG 25KT 4322 9170

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Naylor

Special weather statement, Sep 4, 3:27 PM CDT, 3 hours 2 minutes before

Special Weather Statement
National Weather Service La Crosse WI
327 PM CDT Fri Sep 4 2026

IAZ011-042100-
Allamakee IA-
327 PM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN ALLAMAKEE COUNTY
THROUGH 400 PM CDT...

At 327 PM CDT, Doppler radar was tracking a strong thunderstorm near
Waukon, moving east at 30 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This strong thunderstorm will be near...
  Harpers Ferry around 350 PM CDT.

Other locations impacted by this storm include County Roads A 52 And
X 52, Volney, Waterville, Elon, Maud, Watson, Dalby, Yellow River
State Forest, Thompson Corner, and Waukon Jct.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4308 9143 4328 9143 4330 9109 4327 9107
      4326 9107 4326 9106 4325 9106 4323 9107
      4320 9112 4315 9115 4313 9118 4308 9118
TIME...MOT...LOC 2027Z 282DEG 28KT 4320 9145

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Naylor

Special weather statement, Sep 4, 3:54 PM CDT, 2 hours 35 minutes before

Special Weather Statement
National Weather Service La Crosse WI
354 PM CDT Fri Sep 4 2026

IAZ011-030-WIZ054-061-042200-
Clayton IA-Allamakee IA-Crawford WI-Grant WI-
354 PM CDT Fri Sep 4 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN CLAYTON...SOUTHERN
ALLAMAKEE...NORTHERN GRANT AND SOUTHERN CRAWFORD COUNTIES THROUGH 500
PM CDT...

At 354 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles east of Prairie Du Chien to near
Postville. Movement was southeast at 20 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Strong thunderstorms will be near...
  Prairie Du Chien, Monona, McGregor, and Marquette around 400 PM
  CDT.
  Farmersburg around 410 PM CDT.
  Fennimore around 430 PM CDT.

Other locations impacted by these storms include Volney, Eastman,
Highway 61 And County T, Giard, Watson, County Roads X 16 And W 48,
County Roads K And T, Bridgeport, National, and State Road 51 And
County W 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4324 9160 4326 9087 4292 9049 4290 9161
TIME...MOT...LOC 2054Z 309DEG 19KT 4310 9093 4306 9153

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Naylor

Local storm report, Sep 4, 4:46 PM CDT, 1 hour 43 minutes before

Preliminary Local Storm Report
National Weather Service La Crosse WI
446 PM CDT Fri Sep 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0423 PM     Hail             Monona                  43.05N 91.39W
09/04/2026  M1.50 Inch       Clayton            IA   Public

            Picture of a large hailstone shared via
            NWSChat.

0435 PM     Hail             1 W Giard               43.00N 91.30W
09/04/2026  E1.00 Inch       Clayton            IA   Public

            Report of hail near Giard, estimated around
            quarter sized.

&&

Special weather statement, Sep 4, 5:02 PM CDT, 1 hour 27 minutes before

Special Weather Statement
National Weather Service La Crosse WI
502 PM CDT Fri Sep 4 2026

IAZ029-030-042245-
Clayton IA-Fayette IA-
502 PM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN CLAYTON AND EAST
CENTRAL FAYETTE COUNTIES THROUGH 545 PM CDT...

At 501 PM CDT, Doppler radar was tracking a strong thunderstorm near
Elgin, or 11 miles northwest of Elkader, moving southeast at 15 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This strong thunderstorm will be near...
  Elkader around 525 PM CDT.

Other locations impacted by this storm include Froelich, National,
County Roads B 56 And W 64, Brainard, Giard, County Roads B 56 And X
16, Gunder, St. Olaf, Highway 56 And County W 70, and Highland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4295 9172 4308 9155 4298 9121 4277 9153
TIME...MOT...LOC 2201Z 310DEG 14KT 4297 9157

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Naylor

Special weather statement, Sep 4, 6:10 PM CDT, 19 minutes before

Special Weather Statement
National Weather Service La Crosse WI
610 PM CDT Fri Sep 4 2026

IAZ029-042345-
Fayette IA-
610 PM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHERN FAYETTE COUNTY THROUGH
645 PM CDT...

At 610 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hawkeye, or 7 miles west of West Union, moving east at 20 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This strong thunderstorm will be near...
  West Union and Hawkeye around 615 PM CDT.

Other locations impacted by this storm include Alpha, Richfield,
Donnan, County Roads W 42 And B 40, Douglas, and Eldorado.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4295 9208 4305 9208 4305 9164 4286 9184
TIME...MOT...LOC 2310Z 287DEG 18KT 4300 9194

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Naylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 7:26 PM CDT	Special Weather Statement	ARX	Clark	19 min
Sep 3, 8:34 PM CDT	Special Weather Statement	ARX	Adams	26 min
Sep 4, 2:49 AM CDT	Heat Advisory	ARX	Grant	16 hr
Sep 4, 4:26 AM CDT	Special Weather Statement	ARX	La Crosse	34 min
Sep 4, 5:07 AM CDT	Special Weather Statement	ARX	Vernon	38 min
Sep 4, 2:59 PM CDT	Special Weather Statement	ARX	Crawford	46 min
Sep 4, 3:54 PM CDT	Special Weather Statement	ARX	Crawford	66 min
Sep 4, 4:31 PM CDT	Severe Thunderstorm Warning	ARX	Grant	27 min
Sep 4, 6:42 PM CDT	Special Weather Statement	ARX	Clark	33 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.