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.
Essentially into Wednesday night, thunderstorms will fire on the rim of the summerlike warmth.
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.
Two children were killed and at least another 15 people were injured Monday evening, as strong storms forced a circus tent to collapse in Lancaster, New Hampshire.
Unsettled weather responsible for flooding downpours in Florida last week will gradually lessen over the next several days.
Tropical Storm Guillermo will continue its path toward Hawaii in the coming days bringing large swells and enhanced rainfall to the islands.
After a very hot end to July, some relief is on the way this week for Seattle and other areas of the Northwest.
Building heat across Europe this week will approach monthly and all-time record high levels in several cities.
Public officials are in the process of eliminating Naegleria Fowleri, a brain-eating amoeba, from two drinking water supplies in Louisiana.
Dallas, TX (1980)
A high of 95 degrees, breaking the string of 42 consecutive days of 100 degrees or higher.
Casper, WY (1990)
A total of 0.84" of rain. The normal rainfall for all of August is 0.63".
Alexandria, VA (1992)
80 mph wind gust from a thunderstorm.