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...Jackson, Mississippi, is in the center of the severe weather risk area, with other cities to watch being Memphis, Tennessee; New Orleans; Birmingham, Alabama; and Shreveport, Louisiana.

Given that sunsets are before 5 p.m. in most of the risk area, the majority of the dangerous storms will occur in the dark. This will compound the danger as nocturnal tornadoes are 2.5 times more likely to be fatal than daytime ones.

Flood watches are also in effect along parts of the east-central Gulf Coast, where storms could cause flash flooding through Wednesday morning.

The storm system will shift east on Wednesday, bringing strong thunderstorms, heavy rain and wind to the East Coast. Rain and wind will be the main weather drivers for the Mid-Atlantic to New England area, with strong storms possible from Georgia to northern Florida. ...