Tropical Storm Chantal was downgraded to a depression Sunday but raised concerns of possible flash flooding as it makes its way through central North Carolina toward south-central Virginia.

A tropical storm watch stretches along the coast from Edisto Beach, S.C., to the South Santee River. The hurricane center said those elsewhere along the southeast coast of the United States should also keep an eye on Chantal. Chantal is expected to track slowly to the north and then northwest and move onshore in South Carolina by Sunday morning.