MIAMI (AP) — The Latest on Hurricane Dorian (all times local):

7:55 a.m.

Hurricane Dorian is strengthening as it moves west toward the Bahamas and Florida.

The National Hurricane Center in Miami says maximum sustained winds increased Saturday morning to 145 mph (230 kph), up from 140 mph (220 kph).

As of about 8 a.m. EDT Saturday, the Category 4 storm was 280 miles (450 kilometers) east of the northwestern Bahamas and 445 miles (715 kilometers) east of West Palm Beach, Florida. The storm was traveling west at 12 mph (19 kph).

The hurricane center says the core of Dorian is expected to be near or over the northwestern Bahamas on Sunday and near the Florida east coast late Monday. Strong winds and life-threatening storm surge are also possible along the coasts of Georgia and South Carolina by the middle of next week.

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5:15 a.m.

Hurricane Dorian continues its slow march toward the Bahamas, and, eventually Florida's east coast.

As of 5 a.m. Saturday, the Category 4 storm was 305 miles (490 kilometers) east of the northwestern Bahamas and 470 miles (755 kilometers) east of West Palm Beach, Florida.

The National Hurricane's advisory says maximum sustained winds remained at 140 mph (220 kph), but the storm's speed picked up slightly, moving west at 12 mph (19 kph), up from 10 mph (17 kph).

Hurricane-force winds still extend outward up to 30 miles (45 kilometers) from the storm's center, and tropical-storm-force winds extend outward up to 105 miles (165 kilometers).

Hurricane conditions are expected in the northwestern Bahamas by Sunday, and the storm is expected to near Florida's coast late Monday.

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2:15 a.m.

Hurricane Dorian is slowly moving closer to the Bahamas, en route to Florida's east coast.

As of early Saturday, the Category 4 storm was 340 miles (545 kilometers) east of the northwestern Bahamas and 510 miles (820 kilometers) east of West Palm Beach, Florida. According to the National Hurricane Center's 2 a.m. advisory, maximum sustained winds remained at 140 mph (220 kph) as the storm continued to move west at 10 mph (17 kph).

The advisory says a slower westward motion will likely begin later Saturday.

Hurricane-force winds are extending outward up to 30 miles (45 kilometers) from the storm's center, and tropical-storm-force winds extend outward up to 105 miles (165 kilometers).

Dorian is expected to near the Florida coast late Monday.

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12:30 a.m.

As Hurricane Dorian makes its way toward Florida's east coast, authorities have begun to schedule mandatory evacuations.

Brevard County Sheriff Wayne Ivey said Friday night that a mandatory evacuation for the county's barrier island will take effect 8 a.m. Sunday. The order encompasses the Kennedy Space Center.

Martin County Fire Rescue Chief Bill Schobel said Friday that mandatory evacuations are scheduled to begin 10 a.m. Sunday for the county's barrier islands.

The director of emergency services for Indian River County, Tad Stone, says officials will recommend a voluntary evacuation of the barrier island when hurricane warnings are issued.

Dorian gained Category 4 strength late Friday, clocking top sustained winds of 140 mph (225 kph). It's unclear where and how Dorian will hit Florida, but it's expected to threaten the peninsula late Monday or early Tuesday.

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12:05 a.m.

Hurricane Dorian has gained fearsome new muscle as an "extremely dangerous" Category 4 storm, bearing down on the Bahamas as it edges closer to Florida's east coast.

Millions of people in Florida, along with the state's Walt Disney World and President Donald Trump's Mar-a-Lago resort, are in the potential crosshairs of the hurricane. Forecasters said Dorian gained Category 4 strength late Friday, clocking top sustained winds of 140 mph (225 kph).

Forecasters say it's still too early to tell whether Dorian would make a direct hit on the state's east coast or inflict a glancing blow. They note some computer models predict a late turn to the north that would have Dorian hug the coast.

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For AP's complete coverage of the hurricane: https://apnews.com/Hurricanes