Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. However, cloudiness and showers trailing Tropical Depression Isaac will continue to affect the Lesser Antilles including Saint Lucia during the next 24 hours. The National Hurricane Center says Florence is producing tropical storm-force wind gusts in Florence, South Carolina, about 60 miles from the coast.
"Regardless of development, heavy rainfall and gusty winds are expected across portions of northeastern Mexico, Texas, and Louisiana on Friday and Saturday", the hurricane center said.
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While a tropical storm watch is in effect for St. Kitts and Nevis, at Pond Hill, Nevis, forecaster Harry W. Hallstrom said, "Isaac is getting ripped apart with wind shear".
Although Helene is now a hurricane, it will weaken and be downgraded to a tropical storm by the time it reaches the Azores.
"The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves", the NHC said.
The flooding soon spread into SC, swamping places like North Myrtle Beach, in a resort area known for its white sands and multitude of golf courses.
Officials have confirmed four deaths in North Carolina as a result of Hurricane Florence.
The National Hurricane Center is advising Isaac could deliver 4 to 6 inches of rain to Jamaica with the possibility of flash floods.
North Carolina alone is forecast to get 9.6 trillion gallons (36 trillion liters), enough to cover the Tar Heel state to a depth of about 10 inches (25 centimeters).
Hurricane Helene is likely to head towards the United Kingdom, meteorologists are predicting.
Through the afternoon though, they should begin to fade from Northern Ireland and southern Scotland, as a fresh even strong at first West to South Westerly wind decreases. "These swells are likely to cause life-threatening surf and rip current conditions".
The disaster area was expected to get about as much rain in three days as the 1999 Dennis and Floyd storms dropped in two weeks.