The winter storm could impact up to 170 million people across more than 20 states from the southern Plains to the Midwest and East, AccuWeather said.
The National Weather Service issued a tornado watch that includes New Orleans and Baton Rouge metro areas until 7 p.m. Tuesday. The threat of severe weather prompted New Orleans Mardi Gras parades to roll early Fat Tuesday and attention is now turning what is in the forecast this afternoon and evening.
NWS suggested tornadoes are possible, with wind gusts to 75 mph and isolated storms with large hail up to 1.5 inches in diameter.
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