Miami - Tropical Storm Joyce strengthened to a hurricane yesterday, one of two hurricanes that threatened shipping in the open Atlantic but posed no immediate danger to land, forecasters said.
Joyce, the sixth hurricane of the Atlantic season, charged toward the islands of the south-eastern Caribbean while Isaac, the fifth, regained some strength on a course that could take it near Bermuda.
With maximum winds of 80 m.p.h., Joyce crossed the 74 m.p.h. threshold to become a hurricane but it was not expected to affect the Caribbean islands for another three or four days.