The storm system that brought deadly tornadoes to the South is now moving east, bringing threats of rain and hail with it.

More than 50 million people in the Northeast were under a flood watch on Sunday afternoon as extremely heavy rain moves in to the Northeast this evening and overnight tonight.

As this line of storms continues to push east, they have a likelihood to remain strong to severe in strength, as well, forecasts show. The chance for tornadoes and damaging wind will continue to spread toward the East Coast on Sunday.

A tornado watch remained in effect for millions of people in parts of Alabama, Georgia and the Florida panhandle on Sunday morning, according to the National Weather Service, after six people were killedand dozens more injured from tornadoes that touched down in Tennessee on Saturday.

An observed tornado passed through the southern suburbs of Raleigh, North Carolina, around 12:45 p.m. ET, just before a tornado watch in the region expired at 1 p.m.

Severe weather threats will continue throughout Sunday into parts of the Carolinas.

The areas with a slightly higher risk of seeing the strongest storms include Wilmington and Greenville in North Carolina. Places like Jacksonville, Florida; Charlotte, North Carolina; Baltimore and Washington, D.C., will also have the chance of strong storms. ABC  News