Supercell thunderstorms, explained

Supercell thunderstorms are dangerous storms that unleash large hail, roaring winds and powerful tornadoes.
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Bomb cyclone will bring heavy snow and hurricane-force winds to the Southeast. Coastal New England could be in its path, too

(CNN) — A rapidly strengthening coastal storm is expected to develop this weekend and bring heavy snow, strong winds and coastal flooding to the Southeast amid an outbreak of deadly cold temperatures.