EF1 tornado, Montrose to Belleville, Wisconsin, June 17, 2026

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating, as surveyed

EF1, preliminary

Date

June 17, 2026

Touchdown

7:10 PM CDT (00:10 UTC)

Lifted

7:15 PM CDT (00:15 UTC)

On the ground

5 minutes

Path length

2.7 miles (4.4 km)

Path width

300 yards (274 m)

Deaths

0

Injuries

0

County

Dane County

Touchdown point

42.879, -89.544

Lift-off point

42.874, -89.491

Highest wind the damage implies

110 mph

Surveyed by

NWS MKX

The office's name for it

Belleville

Survey last edited

June 22, 2026

Record number

None yet. SPC numbers 2026 in the spring of 2027.

Tornado began west of a farm in an open field and moved east southeast through the northern portion of Belleville. Numerous trees were snapped and uprooted. Peeled shingles and siding as well as damage to soffit and guttering on several homes. A garage one on home fell in after its roof was lifted. A garage on another home was breached at the garage door and the structure failed, peeling downwind and taking a large portion of the dwelling's roof decking. The tornado continued east southeast over a farm field damaging corn and a long water sprinkler. The end of the path east of County Road D featured additional trees snapped and uprooted before lifting in the Brooklyn Wildlife Area.

Written by NWS MKX in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.

7 damage points were recorded along this path by NWS MKX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 110 mph.

• Starting point in an open field west of Gehin Road.
• Farm on Gehin Road sustained damage to numerous hardwood and softwood trees. A small portion of a barn roof (metal) was peeled off.
• Several trees snapped, large limbs downed. Shingles off roofs, damage to guttering and soffit, small sections of siding peeled off houses.
• Significant damage to garages on two structures. One garage with bolt anchored walls had it's roof lifted and the walls collapsed in on itself. Another garage was anchored by nails and failed, peeling down wind and removing a large portion of the house's roof covering.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

A cluster of thunderstorms developed within the vicinity of a strong mid-upper level shortwave trough and a surface low. One supercell tracked from southeast Minnesota through northeast Iowa and into southwest Wisconsin while maintaining is strength during the late afternoon. The storm evolved into a line as it trtacked through south central Wisconsin during the early evening and produced a swath of damaging winds and three tornadoes.

Tornado began west of a farm in an open field and moved east southeast through the northern portion of Belleville. Numerous trees were snapped and uprooted. Peeled shingles and siding as well as damage to soffit and guttering on several homes. A garage on one home fell in after its roof was lifted. A garage on another home was breached at the garage door and the structure failed, peeling downwind and taking a large portion of the dwelling's roof decking. The tornado continued east southeast over a farm field damaging corn and a long water sprinkler. The end of the path east of County Road D featured additional trees snapped and uprooted before lifting in the Brooklyn Wildlife Area.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

0 minutes of warning. NWS MKX issued a tornado warning for this county at 00:10 UTC, 0 minutes before the tornado touched down, in force until 01:00 UTC.

The county was under a tornado watch, issued at 22:36 UTC and running to 02:00 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Slight Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 20:04 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

The Milwaukee radar (KMKX), 79 km away, was scanning. The volume nearest the touchdown began at 00:09 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2026 tornado in WisconsinEvery tornado in Wisconsin since 1950Warnings in force in Wisconsin nowThe forecast where you are

27 more have been surveyed in the United States that day, so far.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. A survey can be revised, so the rating, the path and the casualties can all still change.

NWS Damage Assessment Toolkit, the record the survey teams file from the damage, and NOAA Storm Prediction Center storm reports. Neither is the official database for 2026, which SPC publishes in the spring of 2027.