STORM SURGE: The combination of a risky storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline.
A tropical storm warning is in effect for Martinique, Dominica and Guadeloupe, while a tropical storm watch is in effect for Antigua, Montserrat, St Kitts and Nevis, and Saba and St Eustatius. Regardless of the exact path, Florence will be a large system, and impacts such as heavy rain and strong winds will extend well beyond the center and at least into southeast SC.
"At 5:00 a.m, T.S Isaac was located near 15.4N 59.7W or about 159 miles (256 km) north of Barbados". Wind shear, which refers to fluctuations in wind strength in the atmosphere, something that tears storms apart, is present in Isaac's path. The winds of Isaac are not expected to affect the Virgin Islands.
In some areas of southeastern North Carolina officials had measured rainfall totals exceeding 16 inches (41 centimeters), warning that some areas could see totals up to 40 inches. 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. Near the coast, the surge will be accompanied by large waves.
The National Hurricane Center said the storm was expected to become a "major hurricane" by Tuesday as it passes between Bermuda and the Bahamas on Tuesday and Wednesday. This is somewhat uncertain, however, given the strong upper-level winds it's battling now.
A tropical storm warning is in effect for all the Azores as Helene is expected to produce tropical storm-force winds up to 185 miles from its center and heavy rains to the islands as it moves at 22 mph, according to the 8 a.m. advisory.
Meanwhile, Caribbean Airlines has announced that due to Tropical Storm Isaac flights BW 434 BW 435 Port-of-Spain to St. Lucia will be affected and passengers are advised to contact its reservation offices for rebooking on the next available service.