A "very active and complex mid-May weather pattern" is settling over states from the central United States through the ...

More than 1,000 tornadoes sprout up across the US in the average year, causing billions of dollars in damage and killing scores of Americans. Track them here.

An incredibly dangerous day of severe thunderstorms including the potential for long-lasting, powerful tornadoes and hurricane-strength wind gusts is underway in the eastern half of the United States.