 Barrels strengthening into a hurricane Saturday, a day after it formed into a tropical storm in the Atlantic. The storm is headed toward the southeastern Caribbean, with forecasters warning that it's expected to strengthen into a dangerous major storm before reaching Barbados late Sunday or early Monday. A major hurricane is considered a Category 3 or higher, with winds of at least 111 mph. Barrels already a Category 1, marking the furthest east that a hurricane has formed in the tropical Atlantic in June.