Input (grade 12): On July 30 it was classified as Tropical Depression Three and was named Tropical Storm Chantal shortly thereafter while south of Nova Scotia.
Output (grade 12): Late on July 30, it was upgraded to a tropical depression, the third of the season, after developing deep convection near the center for most of the day. On July 31, the system strengthened into a tropical storm south of Nova Scotia, the first storm in nearly two months after Barry.