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.

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.

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.