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 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.

"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."