Tropical Storm Chantal, which formed off the coast of South Carolina on Saturday, July 5, is expected to bring heavy rainfall across the coastal Carolinas Saturday night and Sunday, the National Hurricane Center said.

The storm's center was located about 65 miles east of Charleston, South Carolina, on Saturday night, and 120 miles south of Wilmington, North Carolina.

Tropical storm warnings have been extended up to Surf City, North Carolina, as Tropical Storm Chantal is offshore from the southeastern U.S. on Saturday, according to the National Hurricane Center.The storm has maximum sustained winds of up to 50 mph and is moving north at just 8 mph.