Tornado Alley Expands, Impacting Wisconsin

Climate data shows increased tornado, wind, and hail activity in the Badger State.

Published on Feb. 10, 2026

Got story updates? Submit your updates here. ›

According to data from the National Centers for Environmental Information (NCEI) and Storm Prediction Center (SPC), Tornado Alley has been expanding eastward over the past 70 years, with a higher probability of tornadoes, damaging winds, and hail events now impacting central and eastern portions of the United States, including Wisconsin.

Why it matters

The expansion of Tornado Alley means Wisconsin is now more susceptible to severe weather events like tornadoes, high winds, and hail, which can cause significant property damage and pose risks to public safety. Understanding these changing weather patterns is crucial for meteorologists, emergency responders, and residents to prepare and adapt accordingly.

The details

The data shows that over a 30-year climate period, the probability of any tornado in Wisconsin has shifted slightly southwest, while the frequency of weaker tornadoes has slightly increased. The chance for severe winds (60mph or greater) has moderately increased, with 70% to 80% probability in southwestern Wisconsin and 50% to 60% probability in southeastern Wisconsin. The chance for hail greater than or equal to half an inch has significantly increased to 80% to 90%.

  • Over the past 70 years, climate data has shown the expansion of Tornado Alley.
  • Over a 30-year climate period, the probability of tornado activity in Wisconsin has shifted slightly southwest.

The players

National Centers for Environmental Information (NCEI)

A division of the National Oceanic and Atmospheric Administration (NOAA) that provides climate data and information.

Storm Prediction Center (SPC)

A division of the National Weather Service that is responsible for issuing severe weather watches and forecasts.

Got photos? Submit your photos here. ›

What’s next

Meteorologists and emergency responders will need to continue monitoring the changing weather patterns and adapt their preparedness and response strategies accordingly.

The takeaway

The expansion of Tornado Alley into Wisconsin means residents and local authorities must be vigilant and prepared for more frequent, but potentially weaker, tornado, wind, and hail events in the coming years. Understanding these climate trends is crucial for ensuring public safety and minimizing property damage.