Yet even with this months 3 hurricanes, this season seen lower average activity with just 9 named storms. "The flip side is one time out of three it won't be in the cone. But on rare occasions, the steering patterns can line up such that a storm slips into a dead zone between troughs and ridges".
The storm is located 725 miles west of the southernmost Cabo Verde Islands and about 1,515 miles south-southwest of the Azores, moving northwest at 12 mph.
By Sunday, Isaac was still expected to be a tropical storm as it continues straight west across the Caribbean south of Jamaica. And with little wind shear to pull the storm apart, Florence's hurricane wind field was expected to expand over the coming days, increasing its storm surge and inland wind threats, and raising the likelihood of life-threatening freshwater flooding.
The remains of the tropical storms are expected to trigger a surge in temperatures, bringing a freakish end to the warm spell of weather in the south of Britain.More news: As Trump fumes over leaks, Woodward pushes back on criticism
SC coastal areas can expect tropical storm force winds by Thursday morning on the storm's latest track, according to John Quagliariello from the National Weather Service in Columbia.
"This is going to be big", said Victoria Oliva, a meteorologist with the National Weather Service in Wilmington said early Monday morning. "If you end up not needing (hurricane supplies), great, but now is the time to start preparing".
Florence could hit the Carolinas harder than any hurricane since Hazel packed 130 miles per hour (209 kph) winds in 1954.
Since reliable record-keeping began more than 150 years ago, North Carolina has only been hit by one Category 4 hurricane: Hazel, with 130 miles per hour winds in 1954.More news: Canada, U.S. NAFTA Talks Appear to be Progressing
"The chances of it going out to sea are extremely slim at this point", she said.
On its current track Florence is expected to slam the Carolinas and Virginia the hardest - and all three states have issued emergency declarations to speed preparations.
Though Isaac is expected to weaken before making landfall and return to a Tropical Storm by late Thursday, numerous islands are still rebuilding following Hurricane Maria and are expected to experience heavy rain, winds, rough surf and increased rip currents in the oncoming days.More news: Hurricane Florence top winds dip to 130 miles per hour
The University of North Carolina at Wilmington, near the shore, canceled its upcoming alumni weekend and all classes starting at noon Monday, encouraging its students to leave campus for a safer location.