"A more tropical air mass starts to stream northward Sunday night into Monday morning,“ the National Weather Service said in a forecast update Saturday afternoon. ”There will also be some moisture moving northward from what will be left of Tropical Storm Chantal as it is expected to dissipate over North Carolina Sunday night into Monday morning."

Tropical Storm Chantal formed in the Atlantic on Saturday morning and is projected to reach South Carolina's coast on Sunday, the National Hurricane Center said.

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.