Tropical Storm Chantal forms over Central Tropical Atlantic: NHC Sun Jul 7, 2013 11:34pm EDT (Reuters) - Tropical Storm Chantal was formed over the Central Tropical Atlantic on late Sunday, U.S. government forecasters said. Chantal was swirling over about 865 miles of the east-south-east of Barbados, and packing maximum sustained winds of 40 miles per hour, the Miami-based National Hurricane center said. Reporting by Shrutee Sarkar in Bangalore; Editing by Supriya Kurane