The St. Vincent and the Grenadines Meteorological Services says Tropical Storm Isaac is moving toward the west near 16 miles per hour and this motion is expected to continue for the next few days.
At 11am the center of Isaac was located near latitude 14.6 North, longitude 49.7 West.
The center of Isaac is now expected to move near or over the central Lesser Antilles (north of St. Lucia/near Martinique) on Thursday, moving into the Eastern Caribbean Sea Thursday night.
Isaac should be passing about 125 miles north of St.Vincent and the Grenadines. However, feeder bands associated with Isaac should bring some showers and isolated thunderstorm activity across St.Vincent and the Grenadines tomorrow.
As the center of Isaac passes north of this island, instability with occasional moderate to heavy showers can be expected Thursday and Friday.
Maximum sustained winds remain near 70 miles per hour with higher gusts. The estimated minimum central pressure is 996 millibars. Tropical-storm-force winds extend outward up to 105 miles from the center.
Isaac could be near hurricane strength when it moves through the central Lesser Antilles, with some weakening forecast on Friday.
A Hurricane Watch is now in place for Guadeloupe, Martinique and Dominica; with hurricane conditions possible within the hurricane watch area by Thursday morning.
A Tropical Storm watch is in place for Antigua and Montserrat, with tropical storm conditions possible early Thursday in both the hurricane and tropical storm watch areas.
Swells generated by Isaac should begin to affect portions of the Lesser Antilles by tomorrow afternoon. These swells are likely to cause life-threatening surf and rip current conditions.
Sea conditions across St. Vincent and the Grenadines are forecast to deteriorate with swells of 3.0 to 3.5 meters possible on our east coasts during Thursday.
Isaac is expected to produce total rainfall accumulations of 1 to 2 inches across portions of the Windward Islands. Models suggest that rainfall accumulations of 2 – 3 inches are possible across parts of St. Vincent and the Grenadines.