Alert archive / Wisconsin / Tornado Warnings in 2026

Tornado Warning 36, NWS La Crosse, WI

April 27, 2026Jackson County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Apr 27, 2026, 7:42 PM CDT for Jackson County, Wisconsin. It was in force for 22 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
Apr 27, 2026, 7:42 PM CDT (00:42 UTC)
Expired
Apr 27, 2026, 8:04 PM CDT
In force
22 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Jackson County, WI

The radar

The La Crosse radar (KARX), 62 km from the middle of the area, began a volume at 00:41 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.

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 00:00Z, 0.7 hours before the alert went out and 244 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 2026-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2026-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -55 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
549 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-55 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

187 
WFUS53 KARX 280042
TORARX
WIC053-280130-
/O.NEW.KARX.TO.W.0036.260428T0042Z-260428T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
742 PM CDT Mon Apr 27 2026

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Southeastern Jackson County in west central Wisconsin...

* Until 830 PM CDT.

* At 742 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Millston, or 9 miles southeast of Black River
  Falls, moving northeast at 25 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 dangerous storm will be near...
  Millston around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Seventeen Flowage, Bear Bluff Township, Pigeon Creek Campground, and
Potters Flowage.

This includes Interstate 94 between mile markers 123 and 130.
 
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 4416 9075 4420 9080 4435 9054 4421 9040
TIME...MOT...LOC 0042Z 239DEG 23KT 4419 9074 

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

$$

Baumgardt
3 follow-up statements
508 
WWUS53 KARX 280048
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
748 PM CDT Mon Apr 27 2026

WIC053-280130-
/O.CON.KARX.TO.W.0036.000000T0000Z-260428T0130Z/
Jackson WI-
748 PM CDT Mon Apr 27 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN JACKSON COUNTY...

At 747 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Millston, or 8 miles southeast of Black River Falls,
moving northeast at 25 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
southeastern Jackson County, including the following locations...
Seventeen Flowage, Bear Bluff Township, Pigeon Creek Campground, and
Potters Flowage.

This includes Interstate 94 between mile markers 123 and 128.
 
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 4418 9071 4421 9078 4435 9054 4423 9042
TIME...MOT...LOC 0047Z 226DEG 22KT 4421 9071 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Baumgardt
927 
WWUS53 KARX 280056
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
756 PM CDT Mon Apr 27 2026

WIC053-280130-
/O.CON.KARX.TO.W.0036.000000T0000Z-260428T0130Z/
Jackson WI-
756 PM CDT Mon Apr 27 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EAST
CENTRAL JACKSON COUNTY...

At 755 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Millston, or 10 miles east of Black River Falls,
moving northeast at 30 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 Jackson County, including the following locations...
Seventeen Flowage and Potters Flowage.

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 4423 9066 4425 9069 4435 9054 4427 9046
TIME...MOT...LOC 0055Z 228DEG 25KT 4426 9064 

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

$$

Baumgardt
188 
WWUS53 KARX 280104
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
804 PM CDT Mon Apr 27 2026

WIC053-280114-
/O.CAN.KARX.TO.W.0036.000000T0000Z-260428T0130Z/
Jackson WI-
804 PM CDT Mon Apr 27 2026

...THE TORNADO WARNING FOR EAST CENTRAL JACKSON 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.

&&

LAT...LON 4423 9066 4425 9069 4435 9054 4427 9046
TIME...MOT...LOC 0102Z 239DEG 23KT 4429 9057 

$$

Baumgardt

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 Apr 27, 6:43 PM CDT, 59 minutes earlier. Its key messages:

  • While the local severe weather threat is decreasing, still cannot fully rule out an isolated severe storm before 8pm this afternoon. The tornado threat is quite conditional but still non-zero.
  • Cooler and drier for the remainder of the work week with highs in the 50s and lows in the 30s. Warming up next weekend.
Area forecast discussion, Apr 27, 6:43 PM CDT, 59 minutes before
Area Forecast Discussion
National Weather Service La Crosse WI
643 PM CDT Mon Apr 27 2026

.KEY MESSAGES...

- While the local severe weather threat is decreasing, still
  cannot fully rule out an isolated severe storm before 8pm this
  afternoon. The tornado threat is quite conditional but still
  non-zero.

- Cooler and drier for the remainder of the work week with highs
  in the 50s and lows in the 30s. Warming up next weekend.

&&

.DISCUSSION...
Issued at 1247 PM CDT Mon Apr 27 2026

This Afternoon: Convective Evolution Details

A 998-mb quasi-barbell surface low structure was noted along a
cold front advancing through southwestern MN and northwestern IA
early this afternoon, with broad east to southeast flow ahead
of these low centroids and veering flow on the south side of
these lows behind a warm front. A corridor of clearing developed
within the dry slot ahead of the cold front, allowing for some
airmass recovery in the wake of our morning convection. While
only a few degrees, this insolation was enough to trigger
convective initiation along the front shortly before midday in
northwestern Iowa. With the 850-mb jet already displaced to the
east and surface flow veered to the SSW ahead of the front, the
storms are encountering a vertical wind profile unfavorable for
sustained updraft longevity, featuring compressed and complex
hodographs per HRRR/RAP profiles.

An additional line of convergence along the de-facto warm front
lifting into northeastern Iowa could also spark showers and
storms over the next few hours. While these storms will develop
in a more favorable wind profile featuring looped and elongated
hodographs, the lack of daytime heating ahead of the line will
result in struggling updrafts if any do manage to get going at
all. Thus is the story of our current weather setup--two
potential areas of convective development, but neither has both
the favorable thermodynamic and kinematic profiles in place to
support an organized severe weather threat.

While a very low probability (< 10%) given the relatively
progressive nature of the low/front, should sufficient clearing
take place ahead of the front, there could be enough 0-3-km
MLCAPE and surface vorticity pooled along the front to generate
landspout tornadoes with any convection rooted along the
boundary. However, the degree of recovery ahead of the front
will be key and the window of opportunity for such a setup will
be only an hour or two at any given location.

The threat for severe weather departs once the cold front
passes, which looks to be between 3pm and 8pm tonight.

Rest of the Week: Cooler and Drier

Broad longwave troughing with multiple embedded shortwaves resides
over the north-central U.S. through the remainder of the week,
keeping a continued fetch of polar air in place and temperatures
roughly 10 degrees below normal. Several of these aforementioned
undulations bring periods of clouds and possibly light showers
from Tuesday through Thursday, but the probabilities for
measurable precipitation is quite low and impacts should be
minimal. Lows will be dictated by cloud cover and winds with the
surface high pressure centroid remaining upstream, but the need
for Frost/Freeze headlines will increase from Tuesday through
Friday nights. The pattern shifts for next weekend as ridging
builds in, allowing for more seasonal temperatures to creep
northward.

&&

.AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 636 PM CDT Mon Apr 27 2026

Area of TSRA from EAU to DBQ is moving east as of issuance time.
Expect these to clear east of a AUW to DLL line during the 02z
to 03z hour. Lingering MVFR to potentially (20%) IFR stratus
will continue in the wake of a cold frontal passage through
Tuesday morning. Northwesterly winds with gusts to 20-30 knots
will also be predominant behind the front.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.

&&

DISCUSSION...Skow
AVIATION...Ferguson
Hazardous weather outlook, Apr 27, 1:53 PM CDT, 5 hours 49 minutes before
Hazardous Weather Outlook
National Weather Service La Crosse WI
153 PM CDT Mon Apr 27 2026

IAZ008>011-018-019-029-030-MNZ088-095-096-WIZ041>044-053>055-061-
282300-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Winona-Fillmore-Houston-La Crosse-Monroe-Juneau-Adams-
Vernon-Crawford-Richland-Grant-
153 PM CDT Mon Apr 27 2026

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

.DAY ONE...This Afternoon and Tonight

A line of storms moves through this afternoon, some of which could
be severe. A few damaging wind gusts and an isolated tornado
cannot be fully ruled out.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Overnight low temperatures may fall below freezing later this
week, which could damage sensitive vegetation.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

MNZ079-086-087-094-WIZ017-029-032>034-282300-
Wabasha-Dodge-Olmsted-Mower-Taylor-Clark-Buffalo-Trempealeau-
Jackson-
153 PM CDT Mon Apr 27 2026

This Hazardous Weather Outlook is for portions of southeast
Minnesota...central Wisconsin...north central Wisconsin and west
central Wisconsin.

.DAY ONE...This Afternoon and Tonight

A line of storms moves through this afternoon, but severe weather
is not expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Overnight low temperatures may fall below freezing later this
week, which could damage sensitive vegetation.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

KDS

In the hours before

Special weather statement, Apr 27, 4:47 PM CDT, 2 hours 55 minutes before
Special Weather Statement
National Weather Service La Crosse WI
447 PM CDT Mon Apr 27 2026

IAZ009-010-272230-
Winneshiek IA-Howard IA-
447 PM CDT Mon Apr 27 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN HOWARD AND NORTHERN
WINNESHIEK COUNTIES THROUGH 530 PM CDT...

At 447 PM CDT, Doppler radar was tracking a strong thunderstorm near
Ridgeway, or near Cresco, moving east at 35 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...
  Ridgeway around 450 PM CDT.
  Decorah around 505 PM CDT.

Other locations impacted by this storm include Vernon Springs County
Park, Vernon Springs, Hesper, Highlandville, County Roads V 58 And A
46, Burr Oak, Bluffton, Chimney Rock Campground, Locust, and Sattre.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4350 9192 4350 9161 4334 9161 4334 9160
      4330 9160 4330 9161 4320 9208 4321 9208
      4321 9209 4339 9218
TIME...MOT...LOC 2147Z 250DEG 32KT 4332 9207

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

Baumgardt
Local storm report, Apr 27, 5:19 PM CDT, 2 hours 23 minutes before
Preliminary Local Storm Report
National Weather Service La Crosse WI
519 PM CDT Mon Apr 27 2026

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

0431 PM     Hail             1 N Lourdes             43.27N 92.30W
04/27/2026  M1.00 Inch       Howard             IA   Public

&&

Nearby

Tornado Warnings in Wisconsin, 2026Every tornado warning in 2026Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.