Storm Weakens, Another Strengthens

Hurricane Isaac was losing power and posed no threat to land, Eric Blake, a forecaster at the National Hurricane Center (news - web sites) in Miami, said.

Tropical Storm Joyce, however, was likely to become a hurricane in the next few days, he said.

``The Caribbean islands should monitor it but it's still a long ways away -- six days if it moves at its current speed,'' he said.

Isaac was located 1,140 miles east of the Leeward Islands, or near latitude 18.8 north and longitude 44.4 west at 11 a.m., according to the NHC. It was heading west-northwest at 12 mph with maximum sustained winds of 90 mph.

Joyce meanwhile was moving west at 14 mph with winds of 40 mph. Blake said the system was getting better organized and was expected to strengthen by early Wednesday.

Joyce was about 1,660 miles west of the Lesser Antilles at 11 a.m. or near latitude 11.7 north and longitude 34.9 west.