Instability creates rapid storm development, moisture drives updraft speed, and wind shear generates mesocyclone rotation. Stronger updraft speeds in the supercell create larger hailstones.

A supercell thunderstorm loomed over York County Tuesday, impressively captured in a dramatic drone photo by Kari Smith.

Now, this tornado formed from what is known as a supercell, which essentially is a rotating thunderstorm. But how do we get the necessary rotation in the first place? A supercell thunderstorm ...

The rotating updraft in a thunderstorm is key to the development of a supercell and eventually a tornado, NOAA said. "There are many ideas about how this rotation begins. One way a column of air ...

The photograph was taken in west Texas by photographer Laura Rowe and shows a supercell thunderstorm ... that rotate about a vertical axis. This rotation is derived from shear in the environmental ...

it's sometimes tough to spot rotation. One such storm occurred in September 2023 when a weak tornado formed from a low-topped supercell near New Glarus.