Communities in northeast Florida, Georgia and SC raised alert levels, with residents filling sandbags as authorities tested infrastructure and hurricane drills.
"The biggest concern will be Dorian's slow motion when it is near Florida, placing some areas of the state at an increasing risk of a prolonged, drawn-out event of strong winds, risky storm surge and heavy rainfall", NHC said, according to the Sun-Sentinel in Ft.
This graphic shows how much rain is expected to fall in the eastern United States if Hurricane Dorian remains on its current forecast track.
If Dorian had kept to Friday's forecast, meteorologists expected the Keys would experience tropical storm-force winds between 39 and 73 miles per hour. "Based on the storm's trajectory and any warnings issued for our area, we will continue to post updated communications on LEGOLAND.com/florida and our social media channels".
Hurricane Warnings are in effect for the Abacos, Berry Islands, Bimini, Eleuthera, Grand Bahama Island, and New Providence in the Bahamas.
Whether you live in Florida, you're vacationing in Disney World, or you like to keep in touch with the news - you're likely keeping an eye on the Category 4 hurricane on its way to the coast.
The threat for a prolonged period of heavy rainfall across eastern North Carolina is increasing, regardless of the track, with up to 6-10 inches of rain now forecast for Hatteras and Ocracoke islands.
Hurricane Dorian is no small threat. Construction codes require homes to have metal reinforcements for roof beams to withstand winds into the upper limits of a Category 4 hurricane, and compliance is generally tight for residents who can afford it. Risks are higher in poorer communities, which typically have wooden homes and are generally in lower-lying areas.
Hurricane Dorian heads for the US
South Carolina Gov. Henry McMaster declared a state of emergency Saturday, mobilizing state resources to prepare for potential storm effects.
"It's slowed down, we're looking at a multiple day event, we were hoping it would just barrel through and leave", Mr Malik said of forecasts Dorian could sit over Florida for up to two days dumping up to 460 millimetres of water. "2, with proof of residency or a valid ID from the Florida counties under voluntary and mandatory evacuation orders", the theme park said in a Facebook post.
There are no watches or warnings in effect for the Midlands of SC, the weather service said.
Florida's west coast was pummeled by Hurricane Michael just previous year when Mexico Beach and Panama City Beach took the brunt of that Category 5 storm.
"They're buying everything and anything that applies to a hurricane, flashlights, batteries, generators", said Amber Hunter, 30, assistant manager at Cape Canaveral's ACE Handiman hardware store.
Florida Gov. Ron DeSantis and federal officials warned people not to let their guard down.
Raleigh has the potential to begin experiencing sustained winds of 40 miles per hour beginning Tuesday morning and into Thursday morning, though the likelihood of such winds is low. You can access the Cyclocane spaghetti models for Hurricane Dorian here.
Central Florida towns urged residents to remain alert.