Usually, tornadoes in the U.S. rotate counterclockwise. Coriolis force, imparted due to the Earth’s rotation, causes air around low centers to circulate counterclockwise in the northern hemisphere.

Tornadoes do occur in the Southern Hemisphere, albeit at a greatly reduced frequency than in the Northern Hemisphere, primarily because it includes the U.S., which hosts about 75 percent of the ...

This week's question comes from Morning Brief reader Robert, who asks, "Do tornadoes rotate clockwise or counterclockwise? And why?" Meteorologist Jonathan Belles: The answer is both. Low pressure ...