 Barrel strengthening into a hurricane Saturday, a day after it formed into a tropical storm in the Atlantic. The storm is churning toward the southwestern Caribbean with forecasters warning that it's expected to strengthen into a dangerous major storm before reaching Barbados late Sunday or early Monday. Major hurricanes considered a Category 3 or higher with winds of at least 111 miles an hour. Barrel's already a Category 1, marking the furthest east that a hurricane's formed in the tropical Atlantic in June.