New research shows how advanced weather models can warn about tornado danger earlier and help communities prepare with more time.
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Why some storms turn into tornadoes
Not all thunderstorms can produce tornadoes - only about 30% of supercell thunderstorms actually spawn these rotating columns of air. Supercells are severe thunderstorms with intense, rotating ...
A time-lapse video showed a rotating storm in Winnebago, Iowa, that brought heavy rain and flooded streets while tennis-ball-sized hail fell in Watertown, Minnesota.
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