Tropical Storm Joyce forms, stays in open Atlantic

Christmas in August

Map locates Tropical Storm Isaac and its projected path for the next five daysPuerto Rico and the U.S. Virgin Islands braced for torrential rains on Thursday as Tropical Storm Isaac whipped up waves as high as 10 feet (3 meters) in the Caribbean and threatened to become a hurricane that could take a shot at Florida just as Republicans gather for their national convention.

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