The risk of dangerous and damaging thunderstorms will continue Thursday from Detroit and Indianapolis to Little Rock, Shreveport and Memphis.
The storms will organize along an advancing cold front pushing eastward from the Plains and swinging into the Mississippi and Ohio valleys to near the upper Gulf Coast. The line of storms, also called a squall line, is over 1,000 miles long.
The most widespread characteristic of the storms will be strong wind gusts, frequent lighting strikes and sudden downpours. Some communities will be hit with downed trees, power outages and flash flooding. People should seek shelter indoors, away from windows as the storms approach.