Strong storm system moving toward East Coast with more flash flooding possible

There also is the potential for tornadoes in the Carolinas.

Finally, the stagnant stationary weather pattern will begin to move on Thursday, with more heavy rain and severe storms moving from the Midwest into the Northeast Thursday.

Flash flood watches remain in place Thursday morning from Illinois to New Jersey.

There are over 52 million people at risk for more severe storms Thursday, including along the East Coast from New York to Georgia and Alabama. The area will see damaging winds, hail and even a few tornadoes.

Severe storms are also possible in the Plains Thursday, from Colorado to Iowa, where damaging winds and hail will be the biggest threat, but a tornado is possible.