Some of the coldest temperatures are expected in Montana, and avalanche warnings have been issued in Utah, Colorado and ...

The multi-vortex tornado grew to a maximum width of nearly a mile and spent 45-plus minutes on the ground. More than 150 deaths were recorded, making it one of the deadliest tornadoes in history.

The visualization of the leading edge vortex on this and 31 other specimens of maple seeds show that the robotic model maple seeds accurately predicted the presence of a strong tornado-like vortex ...

For Tuesday in the Louisville region, multiple tornadoes were observed ... There may have also been a multi-vortex tornado containing smaller, rapidly spinning whirls. We'll have more confirmation ...

More than 1.4 million Kentucky residents received alerts about an imminent tornado set to hit part of ... more than a dozen schools in the possible vortex path. The counties under alert include ...