This Is a Tornado Emergency in the Making: Several Tornadoes Expected Across Minnesota and Wisconsin Today Including an Isolated EF2-Plus Significant Tornado — and Northern Illinois Is Now Being Added to the Threat Zone
MINNESOTA AND WISCONSIN — The tornado threat across the Upper Midwest today has escalated to a level that demands immediate and urgent attention. Multiple tornadoes are expected across Minnesota and Wisconsin today — not just possible, not just conditional — expected. The forecast includes the potential for an isolated significant EF2-plus tornado, and forecasters are now flagging an increasing chance for tornado activity in northern Illinois as well, with the SPC likely to adjust their maps accordingly. This is one of the most serious tornado setups the Upper Midwest has seen in years.
Three Distinct Tornado Threat Zones — All Active Today
The tornado outlook map, valid April 13, 2026 at 15:00Z, defines three separate and clearly labeled tornado threat zones across the Upper Midwest. Each zone carries a different level of tornado activity expected — and all three are active today.
| Tornado Zone | Label | Areas Covered |
|---|---|---|
| Core highest danger | Several Tornadoes | Rochester, Fairmont, Mason City, Mankato, Eau Claire, Wabasha, Mauston, West Bend, Madison, Milwaukee, Oshkosh, Green Bay, Stevens Point, Wausau area |
| Surrounding elevated zone | A Couple Tornadoes | Saint Cloud, Willmar, Redwood Falls, Watertown, Sioux Falls, Spencer, Ladysmith, Rhinelander, Marinette, Wausau outer areas |
| Expanding outer zone | Isolated Tornado | Dubuque, Davenport, Waterloo, Fort Dodge, Rockford, Kenosha, Janesville, Chicago, Joliet, Kalamazoo, Coldwater, and northern Illinois corridor |
The word several in the core zone is not casual language. It means forecasters are confident that multiple discrete tornadoes will develop across the Rochester, Mankato, Eau Claire, Madison, and Milwaukee corridor today — not just one or two, but several organized tornado events from what are expected to be long-lived and violent supercell storms.
The EF2-Plus Significant Tornado Threat
The most alarming element of today’s forecast is the explicit identification of an isolated significant EF2-plus tornado as part of the expected tornado activity across Minnesota and Wisconsin. This designation means forecasters believe the atmospheric environment today is capable of supporting a violent, long-track tornado in the EF2 range or higher.
To put that in perspective:
| Tornado Rating | Wind Speed | Damage |
|---|---|---|
| EF1 | 86-110 mph | Roof damage, mobile homes destroyed, trees snapped |
| EF2 | 111-135 mph | Roofs torn off well-built homes, mobile homes demolished, large trees uprooted |
| EF3 | 136-165 mph | Entire floors of well-built homes destroyed, cars lifted and thrown |
| EF4 | 166-200 mph | Well-constructed homes leveled, cars thrown significant distances |
An EF2 tornado is powerful enough to tear the roof off a well-constructed home, demolish mobile homes completely, and snap or uproot nearly every tree in its path. When forecasters say EF2-plus is possible, the plus sign means EF3 or stronger cannot be ruled out from the most extreme storm in today’s outbreak.
Northern Illinois — Being Added to the Threat
Forecasters are explicitly stating that there is an increasing chance for tornado activity in northern Illinois today and that the SPC will likely adjust their maps accordingly. This means the current outlook is already considered insufficient to capture the full scope of today’s tornado threat — and an upgrade covering northern Illinois is anticipated.
Cities in northern Illinois that fall within or near the expanding Isolated Tornado outer zone include:
- Rockford
- Chicago
- Joliet
- Kenosha
- Janesville
- Dubuque — on the Iowa-Illinois border
Residents across northern Illinois who are not yet treating today as an active tornado threat day need to reconsider that position immediately. The outlook is moving in a more dangerous direction for this area, not a less dangerous one.
The Several Tornadoes Zone — Cities in the Direct Bullseye
The Several Tornadoes core zone represents the area where today’s tornado activity is most expected and most concentrated. Every city inside this zone should be treating today as a tornado emergency preparation situation right now.
Cities sitting inside the Several Tornadoes core zone include:
Minnesota: Rochester, Mankato, Fairmont, Wabasha
Wisconsin: Eau Claire, Stevens Point, Wausau, Mauston, West Bend, Madison, Milwaukee, Oshkosh, Green Bay
Iowa border: Mason City
This is a large and densely populated corridor — from Rochester and Mankato in southern Minnesota through the entire length of central Wisconsin and into the Milwaukee metro area. Several tornadoes expected across this corridor today means that tornado warnings will be issued, tornadoes will touch down, and anyone in their path without shelter will be in mortal danger.
The A Couple Tornadoes Zone — Still Extremely Dangerous
Surrounding the core Several Tornadoes zone is the A Couple Tornadoes zone — still a designation that reflects expected, not merely possible, tornado activity. Cities in this zone include:
Minnesota: Saint Cloud, Willmar, Redwood Falls, Watertown, Sioux Falls, Spencer
Wisconsin: Ladysmith, Rhinelander, Marinette and outer areas near Wausau
Even a couple of tornadoes from an environment capable of producing a significant EF2-plus event means that any tornado that touches down in this zone could be a violent, long-track storm. The A Couple Tornadoes label should not create complacency — it reflects a genuine and serious threat to life and property across southern Minnesota and the surrounding corridor.
Full Tornado Threat Summary by City
| City | State | Tornado Zone |
|---|---|---|
| Rochester | Minnesota | Several Tornadoes |
| Mankato | Minnesota | Several Tornadoes |
| Fairmont | Minnesota | Several Tornadoes |
| Wabasha | Minnesota | Several Tornadoes |
| Mason City | Iowa | Several Tornadoes |
| Eau Claire | Wisconsin | Several Tornadoes |
| Stevens Point | Wisconsin | Several Tornadoes |
| Wausau | Wisconsin | Several Tornadoes |
| Mauston | Wisconsin | Several Tornadoes |
| West Bend | Wisconsin | Several Tornadoes |
| Madison | Wisconsin | Several Tornadoes |
| Milwaukee | Wisconsin | Several Tornadoes |
| Oshkosh | Wisconsin | Several Tornadoes |
| Green Bay | Wisconsin | Several Tornadoes |
| Saint Cloud | Minnesota | A Couple Tornadoes |
| Willmar | Minnesota | A Couple Tornadoes |
| Sioux Falls | South Dakota | A Couple Tornadoes |
| Ladysmith | Wisconsin | A Couple Tornadoes |
| Marinette | Wisconsin | A Couple Tornadoes |
| Rockford | Illinois | Isolated Tornado — increasing |
| Chicago | Illinois | Isolated Tornado — increasing |
| Joliet | Illinois | Isolated Tornado — increasing |
| Kenosha | Wisconsin | Isolated Tornado |
| Janesville | Wisconsin | Isolated Tornado |
| Dubuque | Iowa | Isolated Tornado |
| Davenport | Iowa | Isolated Tornado |
| Kalamazoo | Michigan | Isolated Tornado outer zone |
| Fort Wayne | Indiana | Outer zone |
What Everyone in the Threat Zone Must Do Right Now
The language in today’s forecast has moved from conditional to expected. Several tornadoes are expected. An EF2-plus significant tornado is possible. Northern Illinois is being added. There is no more time to wait and see.
- Get to your tornado shelter now and know exactly where it is — basement or lowest interior floor room away from all windows — and communicate the plan to every person in your household before storms arrive
- Do not be in a mobile home or manufactured home at any point during today’s tornado threat window — these structures offer no protection from EF2 or stronger tornadoes and must be evacuated to a substantial structure
- Keep your weather radio on and phone alerts active throughout the entire afternoon and evening — several tornado warnings will be issued across this corridor today and you need to receive them the instant they drop
- If you are in the Several Tornadoes core zone — Rochester, Mankato, Eau Claire, Madison, Milwaukee, Green Bay — treat every hour from now until tonight as a potential tornado warning window
- Northern Illinois residents — the SPC upgrade is coming, the threat is increasing, and you need to be prepared today just as much as residents in the core zone
Today’s Tornado Threat — Final Summary
| Factor | Details |
|---|---|
| Outlook valid | April 13, 2026 at 15:00Z |
| Tornado expectation | Multiple tornadoes expected — not just possible |
| Core zone label | Several Tornadoes |
| Surrounding zone | A Couple Tornadoes |
| Outer zone | Isolated Tornado — northern Illinois being added |
| Significant tornado potential | Isolated EF2-plus tornado expected |
| Northern Illinois status | Increasing threat — SPC upgrade likely |
| Most dangerous cities | Rochester, Mankato, Eau Claire, Madison, Milwaukee, Green Bay |
Several Tornadoes Are Expected — Not Possible, Expected
Today is not a watch-and-wait day for Minnesota, Wisconsin, and now northern Illinois. Several tornadoes are expected. An EF2-plus significant tornado is part of the forecast. The threat zone is expanding into northern Illinois and an SPC upgrade is anticipated. This is a life-threatening tornado outbreak in progress across the Upper Midwest.
Get underground. Stay underground. Keep alerts active. Today’s tornado threat is as serious as the language in the forecast suggests — and that language is as serious as it gets.
Stay with CabarrusWeekly.com for live tornado outbreak coverage, confirmed tornado reports, and real-time warning updates across Minnesota, Wisconsin, and northern Illinois throughout today’s dangerous and evolving severe weather event.
