A recent study explores the puzzling decline in EF5 tornadoes, contributing it to more strict criteria in the Enhanced Fujita scale introduced in 2007.
A tornado touched down in an open field on Feb. 24 in Codington County, the first time a tornado was documented in February in South Dakota history.
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Dallas weather: How strong were Tuesday's winds?
Dallas-Fort Worth saw hurricane-force winds on Tuesday morning.
Don't treat tornado watches or warnings lightly. Deadly twisters can hit in Mississippi all year. See what the weather data ...