 American, Delta, and United all expect to fly a record number of passengers, more than 18 million over the next 11 days, with Sunday, July 7th, likely to be their busiest. The National Hurricane Center says Barrow has strengthened from a tropical storm into a hurricane. Weather Channel meteorologist Kelly Kass. It is forecast to become not just a Cat 1, but a Category 2 hurricane. We'll continue to monitor it as it heads through the Caribbean Sea.