Swells generated by Isaac are affecting portions of the Lesser Antilles. It was located about 345 miles east of Guadaloupe.
Antiguans and Barbudans can feel some relief that Tropical Storm Isaac, which was forecasted earlier as a potential hurricane to hit the twin island state by today had been deemed yesterday to be "poorly organised" and weaker as it moved closer to the Caribbean. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations hard or unsafe.
"It's just extremely busy and it's even busier than a year ago and all at once", Blake said. These conditions could allow for regeneration of the system as it approaches Cuba and the Yucatan Peninsula, but given the uncertainty in whether Isaac will survive long enough to take advantage of these conditions, the official forecast still calls for dissipation, the NHC said. "It's a nasty interplay that makes it very hard".
Data from a NOAA P-3 Hurricane Hunter aircraft indicate maximum winds remain near 40 knots, although the area of tropical-storm-force winds has shrunk since Wednesday.
In the Pacific, Tropical Depression Olivia continues to move west away from Hawaii.
All watches and warnings were discontinued yesterday. Sustained winds slowed slightly to 125 miles per hour Tuesday afternoon, making it a Cat 3 storm.
Given the lack of deep convection to sustain the cyclone, continual gradual weakening is expected.
After forecast models showed steering currents collapsing as the storm nears the Carolina coast Tuesday, forecasters shifted the track slightly south. Depending on the track after Friday, the threat for strong winds could spread beyond the Watch area across southeast SC and parts of southeast Georgia Saturday. Rain chances also increase Saturday afternoon into Saturday night.
By the time it reaches the Azores, it is expected to have slowed down and be re-classified as a tropical storm.
"Just because we have a landfall to the south doesn't mean your out of the woods because the wind around this storm is huge", National Hurricane Center Director Ken Graham said Wednesday morning.
Meanwhile, tropical storm Joyce continues its advance through the southwest Atlantic with maximum sustained winds of 65 kilometers per hour, although it does not represent a threat to populated areas.
Some slight strengthening is possible during the next couple of days. Strong winds and heavy rainfall had already left tens of thousands of residents without power.