As of 8 a.m. EDT (1200 GMT), Dorian has maximum wind speeds of 160 mph (260 km/h) as the storm churns about 35 miles (55 km) east of Great Abaco Island, the NHC wrote in the update.
The hurricane was approaching the eastern end of Grand Bahama island in the evening, forecasters said.
Hurricane-force winds extend outward up to 30 miles from the center and tropical-storm-force winds extend outward up to 105 miles.
It has sustained winds of 175mph, with wind gusts of 200mph. The storm was moving west (275 degrees) at 8 miles per hour.
Jeffrey Allen, who lives in Freeport on Grand Bahama, said he had learned after several storms that damage predictions sometimes don't materialize, but he still takes precautions.
Hurricane Dorian on Sunday became the strongest storm of its kind to hit the Bahamas - and Atlantic Ocean's most intense in almost 85 years - with sustained reported winds of 185 miles an hour and gusts over 220mph.
Despite Dorian appearing to spare the United States a direct impact, the NHC warned the Category 5 storm on the five-step Saffir-Simpson Wind Scale would lash millions from Florida to the Carolinas with strong winds and punishing surf.
Strong winds and driving rain have been pounding the Bahamas as the powerful Category 5 storm begins to move across the region.
Hurricane Dorian is Category 5, Tropical Storm Warning for Sebastian, Vero Beach
People tracking the storm believe it will travel up the Florida coast and through the Carolinas through next week.
"The hurricane will then move dangerously close to the Florida coast late Tuesday through Wednesday evening and then move dangerously close the Georgia and SC coasts on Wednesday night and Thursday", NOAA forecasters wrote.
"Although the official track forecast does not show landfall", the advisory states, "users should not focus on the exact track since a Florida landfall is still a distinct possibility". The storm was expected to slow even more as it continues moving west over the next day or two. The same area was also put under a storm surge watch.
A tropical storm watch means that tropical storm conditions are possible within the watch area, generally within 48 hours.
The latest EURO model shows Dorian tracking north after the Bahamas, sparing Florida.
Meanwhile, forecasters have revised their forecast track a bit more to the west, increasing the threat to Florida.
A tropical storm warning was issued between Deerfield Beach and Sebastian Inlet on southern Florida's east coast, while a tropical storm watch was issued between Deerfield Beach down to Golden Beach.
People along the Florida east coast should continue to prepare for hurricane conditions, including the risk of property damage, coastal flooding, flooding from heavy rainfall, beach erosion, large waves and loss of power.
"That could produce life-threatening storm surge and hurricane force winds", DeSantis said.
The official forecast path for Dorian curves the storm away from the area before it strikes land.
In Washington, US President Donald Trump met with his emergency management chiefs and declared "this looks monstrous".
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