Tropical storm warnings were extended up to Surf City, North Carolina, as Tropical Storm Chantal churned off the coast of the southeastern U.S. on Saturday, according to the National Hurricane Center.

Tropical Storm Chantal has grown slightly in strength as it nears the southeast U.S. coast. The National Hurricane Center issued warnings for parts of the Carolinas on Sunday.

Forecasters with the National Weather Service said Tropical Storm Chantal is expected to move across the coast of South Carolina on Sunday.