Isaac is becoming less organized over the Eastern Caribbean Sea according to the U.S. National Hurricane Centre.
Isaac is moving west at 21 miles per hour.
Florence blew ashore early Friday in North Carolina with 90 miles per hour winds, buckling buildings, deluging entire communities and knocking out power to more than 900,000 homes and businesses as it crawled inland and weakened into a still-lethal tropical storm. "Intermittent rain bands are expected on St. Croix as Isaac passes south of the big island".
WIND: Tropical storm conditions are expected on Martinique, Dominica, and Guadeloupe by tonight or early Thursday.
Tropical-storm force winds have been battering the Outer Banks and SE coastal NC for most of the afternoon, but as Hurricane Florence veers closer to the Carolinas coastline, hurricane-force winds are also inching closer to land.
The public is encouraged to continue monitoring the Met Office via its social media accounts and website at www.metoffice.gov.tt for updates. It was traveling west at 14 miles per hour.
"As this weather system moves westward across the tropics, warm ocean air rises into the storm, forming an area of low pressure underneath", the NOAA adds.
Storm surge occurs when the hurricane-force winds blow over the ocean water.
But the good news is that Florence may be the last real hurricane threat for the USA, at least for a while.
That's almost double the wave heights documented on Tuesday, when the NHC said satellites had observed "an expansive area of wave heights 12 feet or greater" circulating around Hurricane Florence and peak waves of 45 feet near its center.
Morehead City, North Carolina, had received 23 inches (58 centimetres) of rain by Friday night, and forecasters warned Saturday morning that parts of the Carolinas could get up to 15 inches (38 centimetres) more.
The agency is also monitoring a tropical disturbance that has a 60 percent chance of forming a tropical storm.