The risk of severe weather will shift farther east through Thursday, centering on the Mississippi Valley area Wednesday evening.
The risk to lives and property will continue with lesser impact ranging from power outages and downed trees to travel disruptions and foiled activities.
There is the potential for thunderstorms with damaging wind gusts, large hail and flash flooding from Indiana southwestward to Louisiana and the upper Texas coast and from Indiana eastward to Pennsylvania, New Jersey and northern Maryland.
There is also the potential for a few tornadoes to be produced. The greatest risk for tornadoes Wednesday evening extends from southern Indiana and southern Illinois to northern Louisiana and northwest Mississippi with central and eastern Arkansas, western Tennessee and southeastern Missouri in the middle.
Cities in the path of the severe thunderstorms into the evening hours Wednesday include Indianapolis, Champaign, Ill., Columbus, Ohio, Scranton, Pa., St. Louis, Paducah, Ky., Memphis, Little Rock, Ark., Greenville, Miss., Shreveport, La., and Houston.
During the overnight hours Wednesday, the storms will continue to march eastward at increasing forward speed.
The risk of a few of tornadoes will continue after dark, adding to the severe weather threat.
During Thursday and Thursday night, strong to locally severe thunderstorms are likely to affect the central and southern Appalachians and Piedmont areas to as far south as northern Florida.
It is possible that downpours and thunderstorms could affect activities during activities at the 2013 Masters Tournament at Augusta, Ga., Thursday afternoon into Friday morning.
The spotty thunderstorms with large hail from Tuesday night over the Plains was becoming more linear in nature and could form a solid line of thunderstorms by later Wednesday. The weather community refers to this as a squall line.
Thumbnail images of an approaching squall line by Flickr user CR Artist.
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