Communities inland were getting hit hardest, with eastern Pennsylvania serving as the bull's-eye for the storm. West Milford, N.J., about 45 miles northwest of New York City, had received 15.5 inches of snow by Saturday night, while Plainfield, Mass., had gotten 14.3 inches. New York City's Central Park set a record for both the date and the month of October with 1.3 inches of snow.
More than 2.2 million customers lost power from Maryland north through Massachusetts, and utilities were bringing in crews from other states to help restore it. More than half a million residents in New Jersey, Pennsylvania and Connecticut were without power, including New Jersey Gov. Chris Christie. By late Saturday, the storm had vacated most of Pennsylvania and was tracking northeast.
In New Jersey, 320,000 people are without power.
Another 320,000 are without power in Connecticut. Connecticut Power & Light say it's the 4th worst storm in Connecticut's history.
According to Con Edison, more than 50,000 customers have lost electric service from Saturday's fall snowstorm.
Nearly 35,000 outages are in Westchester County; Staten Island has approximately 12,000 customers without electricity and The Bronx, about 6,000.
The remainder are scattered in Brooklyn and Queens. As the heavy, wet snow continues to pile on tree limbs, additional outages may occur. The New York City Office of Emergency Management issued another Hazardous Travel Advisory for Saturday afternoon and evening.
The organization also advises that no one should enter any City Park until further notice.
Heavy, wet snow and strong gusts, combined with full leaves still on trees, is damaging thousands of trees in parks throughout the City, creating an elevated and ongoing danger of falling branches and trees.
Forestry crews are working to address the damage and will continue throughout the storm. Throughout the region, officials had warned that the early storm would bring sticky snow on the heels of the week's warmer weather and could create dangerous conditions. New Jersey, Connecticut and Massachusetts declared states of emergencies. Connecticut authorities blamed at least one traffic death on the storm.
"It's a little startling. I mean, it's only October," said Craig Brodur, who was playing keno with a friend at Northampton Convenience in western Massachusetts, which had received about 4 inches of snow by Saturday night.
And the storm was expected to worsen as it swept north. The heaviest snowfall was forecast for later in the day into Sunday in the Massachusetts Berkshires, the Litchfield Hills in northwestern Connecticut, southwestern New Hampshire and the southern Green Mountains. Wind gusts of up to 55 mph were predicted especially along coastal areas.
Some said that even though they knew a storm was coming, the severity caught them by surprise.
"This is absolutely a lot more snow than I expected to see today. I can't believe it's not even Halloween and it's snowing already," Carole Shepherd of Washington Township, N.J., said after shoveling her driveway.
The storm disrupted travel along the Eastern Seaboard. Philadelphia International Airport, Newark Liberty International Airport and John F. Kennedy International Airport all had hourslong delays Saturday. Amtrak suspended service between Philadelphia and Harrisburg, Pa., and commuter trains in Connecticut and New York were delayed or suspended because of downed trees and signal problems.
Residents were urged to avoid travel altogether. Speed limits were reduced on bridges between New Jersey and Pennsylvania. A few roads closed because of accidents and downed trees and power lines, and more were expected, said Sean Brown, a spokesman for the Pennsylvania Department of Transportation.
The storm came on a busy weekend for many, with trick-or-treaters going door-to-door in search of Halloween booty, hunting season opening in some states and a full slate of college and pro football scheduled.
But the snow didn't deter the travel plans of Dave Baker, who's been going to Penn State football games for 45 years and made the 200-mile drive from Warminster, outside Philadelphia. He merely adjusted his packing list: Out went the breakfast fixings ? his group ate early at a restaurant rather than at the tailgate ? in stayed the burgers and hot dogs. And the cold came in handy.
"I didn't have to buy as much ice for the beer," he said.
Elsewhere outside the stadium, 11-year-old Cody Carnes of Pittsburgh made a large snowball as he sweated underneath five layers of clothes ? a rain slicker, coat, sweatshirt, T-shirt and thermal. Another fan wore a foam Donkey Kong costume headpiece as he walked to a tailgate.
"It keeps my head nice and warm," explained Matt Langston, 25, a graduate student from Harrisburg.
In eastern Pennsylvania, snow caused widespread problems. It toppled trees and a few power lines and led to minor traffic accidents, according to dispatchers. Allentown, expected to get 4 to 8 inches, is likely to break the city's October record of 2.2 inches set on Halloween in 1925.
Philadelphia was seeing mostly rain, but what snow fell coated downtown roofs in white. The city was expected to get 1 to 3 inches, its first measurable October snow since 1979, with a bit more in some suburbs, meteorologist Mitchell Gaines said.
The last major widespread snowstorm to hit Pennsylvania this early was in 1972, said John LaCorte, a National Weather Service meteorologist in State College.
Southern New Jersey was soaked with heavy rains and winds that ranged from 20 to 35 mph, while northern communities awaited the arrival of 5 to 10 inches of snow. Jersey Central Power & Light, which was heavily criticized for being too slow to restore power following Hurricane Irene, had hundreds of workers set to be deployed.
Parts of New York saw a mix of snow, rain and slush that made for sheer misery at the Occupy Wall Street encampment in New York City, where drenched protesters hunkered down in tents and under tarps as the plaza filled with rainwater and melted snow.
Technically, tents are banned in the park, but protesters say authorities have been looking the other way, even despite a crackdown on generators that were keeping them warm.
"I want to thank the New York Police Department," said 32-year-old protester Sam McBee, decked out in a yellow slicker and rain pants. "We're not supposed to have tents. We're not supposed to have sleeping bags. You go to Atlanta, they don't have it. You go to Oakland, you don't have it. And we got it."
October snowfall is rare in New York, and Saturday marked just the fourth October day with measurable snowfall in Central Park since record-keeping began 135 years ago, the National Weather Service said.
Along the coast and in such cities as Boston, relatively warm water temperatures could keep the snowfall totals much lower, meteorologist Bill Simpson said, with 1 to 3 inches of snowfall forecast along the I-95 corridor. Washington received a trace of snow, tying a record for the date set in 1925.
But October snow records could be broken in parts of southern New England, especially at higher elevations. The October record for southern New England is 7.5 inches of snow in Worcester, Mass., in 1979.
Rain and snow were due to begin falling on Vermont, New Hampshire and Maine during the day, with the heaviest snow falling overnight. Parts of southern Vermont could receive more than a foot.
The first measurable snow in New England usually falls in early December, and normal highs for late October are in the mid-50s.
But not everyone was lamenting the unofficial arrival of winter.
Two Vermont ski resorts, Killington and Mount Snow, started the ski season early by opening one trail each over the weekend, thanks to the recent snow and cold. Maine's Sunday River ski resort also opened for the weekend.
In State College, 14-year-old Mac Charvala and his brother Will, 10, of South Orange, N.J., were using new body boards to slide along an inch of slushy snow covering a parking lot.
"We've never been to a snow game before," said their father, Mike. "It's an adventure. If you don't want to have fun, stay home."
Associated Press writers Ron Todt in Philadelphia; David B. Caruso and Colleen Long in New York; Jay Lindsay in Boston; Eric Tucker in Washington; Bruce Shipkowski in Trenton, N.J.; and Clarke Canfield in Portland, Maine, contributed to this report.