Strong Tornadoes crossed four states in middle USA on December 11, 2021.

Image by FY-3D on December 13, 2021.

Image by GEOs shows the evolution of this system.

Image by GEOs at 10:00 (UTC) on December 11, 2021 shows several mesoscale convective cloud cluster with lowest bright temperature colder than -70°C, which is relatively rare in winter.