Tornado outbreak sequence of March 26-April 2, 2021 (Blackford)

the Tornado outbreak sequence of March 26-April 2, 2021 was a period of extreme tornado activity that struck the Great Plains of the United States and Canada primarily in late March and very early April of 2021. However, this period was also the most active period for tornado development in Wisconsin state history.

Most well known for a period of extreme tornado activity towards the middle of the sequence, which is often called the 2021 Super Outbreak.

March 26-27 outbreak (Tornado outbreak of March 26-27, 2021)
On March 21, models began picking up a storm system tracking across the central United States from March 26 through 28. The Storm Prediction Center issued a 15% risk of severe thunderstorms for much of the central United States in the Day 5 outlook on March 22.

This was increased to a 30% chance on the Day 4 outlook along a line from Dallas, Texas to Oklahoma City, Oklahoma to Wichita, Kansas, in the Day 4 outlook on March 23, another 15% chance was also marked for the Great Lakes Region. A enhanced risk was introduced, replacing the 30% chance on March 24 for the Day 3 outlook, and this was upgraded to a moderate risk in the Day 2 outlook on March 25, with the enhanced risk being expanded.

Meanwhile, a moderate risk was also introduced in the Day 3 outlook on March 25.

THIS IS A WORK-IN PROGRESS!