Computer-model forecasts generally project the storm to make landfall between northern SC and North Carolina's Outer Banks as a Category 4 on Thursday, although shifts in the track are possible and storm impacts will expand great distances beyond where landfall occurs.
A man walks a flooded street in Old Town Alexandria, Virginia.
"He said that the federal government would be there for North Carolina, and we're certainly going to depend on that".
The weather system is now a category four storm carrying sustained winds of about 215km/h.
After Florence makes landfall, that ridge, now over Washington and NY, will move east - but be replaced by another one forming over the Great Lakes that will likely keep the storm stuck, McNoldy said.
All of this means that, in addition to very strong winds and storm surge beginning Thursday along the Carolina coasts, the southeastern United States will have to prepare for a major, and perhaps historic, flooding event.
"This storm is a monster", North Carolina Governor Roy Cooper told a news conference on Tuesday. "It's big and it's vicious".
"We're going to get a lot of rainfall in a relatively short time", he said, adding flooding could be "life-changing" for many.
As Florence began to strengthen late last week and the Cape Fear region landed in her path, people began posting memes asking when and if Cantore would pop up in the region. While it may or may not officially become a Category 5 storm, it will still be a major Hurricane at landfall.
"The atmosphere overall, before the potential landfall, certainly looks like we are going to have a very unsafe hurricane on our hands", Weather Channel meteorologist Jim Cantore told the Wilmington (N.C.) StarNews.
Novak Djokovic Wins the U.S. Open
The effort took its toll on a suddenly weary-looking Del Potro as a 95-minute set was claimed by Djokovic in the tiebreak. Djokovic admitted that at the start of his career, he did not look forward to playing Nadal, Federer. "I owe it to them".
Jon Gruden Is Getting Crushed For What He Said After The Loss
As he always does, McVay fired up his players in the locker room afterward with a passionate postgame speech. ESPN's power panel picked one new player for each National Football League team who came up big in Week 1.
Elizabeth Smart upset her kidnapper to be freed
Utah Board of Pardons and Parole spokesman Greg Johnson said Barzee will be freed on September 19. She then returned to Utah in 2016 to serve her state prison sentence there.
US President Donald Trump signed declarations of emergency on Tuesday for both North Carolina and SC, freeing up federal money and resources for storm response. More than 1 million residents have been ordered to evacuate from coastal areas of the three states, closing university campuses, schools and factories.
By Saturday, total rainfall could accumulate to 20 inches (51 centimeters) - or even 30 inches in places - in parts of the Carolinas and Virginia, the NHC said.
McMaster rescinded the order Tuesday for Beaufort, Jasper and Colleton counties - less than 24 hours after he placed an evacuation order on the state's entire coastline.
"It can save your life", he said.
Rainfall could be up to 20in (50cm) in some areas. This could worsen if, as some meteorologists predict, Florence stalls after it makes landfall.
Officials in several states have declared states of emergency, including Virginia and Maryland, where coastal areas are still recovering from summer storms. "Plus the battering waves will cause massive damage and destruction".
"Residents in central North Carolina should be prepared to feel the impact of the storm from Thursday night through at least Monday due to threat of flooding and widespread and prolonged power outages", Gov. Cooper said.
North Carolina officials evacuated long-term care facilities and hundreds of prisoners in vulnerable areas, and also closed state parks, museums and other attractions. Ten to 15in (25 to 38 cm) of rain is forecast for the Big Island.