On average, about 800 tornadoes occur in the United States each year. They can appear and disappear in moments, and key details about their formation are unknown. These factors make the research ...

How tornadoes form and how they die is not fully understood, yet scientists probing those mysteries—and aiming to improve warning systems—have pinpointed key risk factors. A tornado ...

A tornado that forms with plenty of humid air around it will likely form a thick cloud that may look dark, grey, or white depending upon whether it is lit from the front or from behind ...