Millions under tropical storm warnings and flash flood watches as Elsa moves up the East Coast
(CNN) -- After walloping the Southeast, Tropical Storm Elsa is heading north and predicted to affect all major cities in the coastal Northeast.
Early Friday morning, Elsa was about 5 miles east of Atlantic City, New Jersey, according to the National Hurricane Center, and racing to the northeast.
Elsa is bringing heavy rain, gusty winds and a tornado threat to the region. It will be near Boston in the afternoon and move into the Atlantic off Canada late Friday evening, CNN meteorologist Monica Garrett said.
As Elsa moves near Long Island and southern and coastal New England, heavy rainfall could lead to considerable flash and urban flooding. Flash flood watches are posted for more than 40 million people from New Jersey to Maine.
Winds could gust up to 65 mph, and rotating storms moving inland from the outer bands could cause some brief tornadoes from Long Island to New England.
A tropical storm warning is still in effect from southern New Jersey to near Boston.
Elsa already has caused tornadoes, multiple injuries and at least one death in Florida and Georgia this week.
In New York, roads and subways looked "straight out of a disaster movie Thursday," CNN affiliate WCBS reported. Cell phone video showed water streaming down the steps of 149th Street subway station, and waist-high water at 157th Street.
"The concrete above ground does not absorb the water. The water comes through the vents down the stairs in those waterfalls, and then if the drains at the street level can't handle the water, it goes over the curb and makes things even worse," Metropolitan Transportation Authority Chair Sarah Feinberg said, according to WCBS.
The MTA was pre-positioning crews and equipment in Long Island, where the storm was forecast to be most pronounced.
The MTA, which manages the subway system and other rail lines, bridges and tunnels, also banned empty tractor-trailers and tandem trucks on its seven bridges and in its two tunnels until at least noon Friday.
The storm was moving at 25 mph and has maximum sustained winds of 50 mph, according to the National Hurricane Center. Much of the Northeast will likely see 2 to 4 inches of rainfall by the weekend.
Even when Elsa's center passes an area, residents there can still expect to see heavy bands of rainfall on the outskirts.
Tornadoes reported across the South
Tornadoes were reported across northern Florida and southeastern Georgia on Wednesday, including an EF-2 tornado that caused multiple injuries and damage at Naval Submarine Base Kings Bay in Kings Bay, Georgia.
Elsa's first US target was Florida -- and it caused damage and one death near the Georgia-Florida border.
The system made landfall Wednesday along the Gulf Coast in Taylor County, Florida, the NHC said. Roads flooded in Steinhatchee, CNN affiliate WCTV reported.
In Jacksonville, winds from Elsa caused a tree to fall on two cars during an afternoon commute, killing one person, Jacksonville fire rescue Capt. Eric Prosswimmer said. A possible tornado touched down Wednesday evening, according to Mayor Lenny Curry.
Correction: An earlier version of this story misstated the flash flood alert for portions of the Northeast. It is a flash flood watch.
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