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Jim Reed

A supercell thunderstorm strikes in South Dakota. Among the most severe storms, supercells can bring strong winds, hail, and even tornadoes.

A supercell thunderstorm takes over the landscape in South Dakota, producing cloud-to-ground bolts of lighting as it stretches across the twilight sky. Supercell thunderstorms are dangerous storms characterized by strong winds, hail and tornadoes.

Concurrent landspout tornadoes swirl side-by-side across cropland. Landspout tornadoes are a type of non-supercell thunderstorm that are typically weak and are less likely to cause damage.

A lone lightning bolt strikes the ground beneath an isolated supercell thunderstorm at sunset. Supercell thunderstorms are one of two types of thunderstorms that produce tornadoes. They’re the most common and the most dangerous.

A landspout tornado grinds across a farm field. Though they can cause damage, typically landspout tornadoes – or narrow, rope-like condensation funnels that form underneath a growing cumulus cloud – are weak in strength.

A supercell thunderstorm strikes in South Dakota. Among the most severe storms, supercells can bring strong winds, hail, and even tornadoes.