Heavy rain, flash flooding and severe weather threat associated with astrengthening storm system to continue this afternoon and tonight in theSoutheast......Powerful storm system to foster heavy rain and high wind potential overmuch of the eastern U.S. on Thursday; severe weather and flash floodthreats forecast in parts of the Southeast and upper Ohio Valley......High winds along with widespread moderate to heavy rain expected toimpact the entire Eastern Seaboard into the Great Lakes Thursday...