In some extreme cases, thunderstorms can spawn a derecho, a long-lived windstorm with gusts over 100 mph, strong enough to ...

Scientists said the storm's strength and potential for far-reaching impacts is notable, but its timing isn't unusual.

A massive storm system in the US is causing severe weather in the Mississippi Valley and Deep South, with tornadoes, strong ...

Dozens of tornadoes are reported from thunderstorms that lit up the radar from Wisconsin to Mississippi in the early hours ...