Travelers leave the Back Bay train and subway station during a winter nor'easter snow storm in Boston on Friday. Nearly two feet of snow fell in parts of Massachusetts. Brian Snyder/Reuters A man clears snow from a sidewalk in Brooklyn following a snow storm that dumped up 8 inches of snow in parts of New York on Friday. Spencer Platt/Getty A snow plow clears the road of snow along the New York State Thruway Interstate 87 in Tarrytown, New York on Friday. Mike Segar/Reuters Cars cautiously move down a snow covered highway in Brooklyn following a snow storm that left up to 8 inches of snow on Friday in New York City. Spencer Platt/Getty New York City Mayor Bill de Blasio shovels the sidewalk in front of his Brooklyn house on Friday. Seth Wenig/AP A woman walks up snow covered subway stairs in Brooklyn on Friday. Dangerously cold temperates are predicted for the day and evening hours. Spencer Platt/Getty A woman walks down a snow covered street in Brooklyn on Friday. Spencer Platt/Getty A man plows snow in a parking lot covered in snow on Friday in Jersey City, N.J. New Jersey Gov. Chris Christie declared a state of emergency Thursday, urging residents to stay home. Schools were closed as temperatures reached below 20 degrees with wind-chills below zero in some places. Julio Cortez/AP A woman uses a shovel to dig her car out a snowbank on Friday in Queens, New York. The New York City Office of Emergency Management issued a hazardous travel advisory into Friday, warning that roads likely would be icy and snow would continue to drift. Frank Franklin II/AP Heavy machinery clears the snow at New York's LaGuardia Airport, where nearly seven inches of snow accumulated. Zoran Milich/Reuters A couple takes an evening stroll through the snow on Thursday evening in Frederick, MD. Katherine Frey/The Washington Post, via Getty A bicycle is buried by overnight snowfall on Friday in Queens, New York. New York City public schools were closed Friday after up to 7 inches of snow fell by morning in the first snowstorm of the winter. John Minchillo/AP People walk on the snow covered hill of Leonard Gordon Park as snow falls over them on Thursday in Jersey City, N.J. Julio Cortez/AP A tourist catches snowflakes on her tongue during snow fall in Times Square, New York on Thursday. Darren Ornitz/Reuters People walk through the snow in lower Manhattan on Thursday. Allison Joyce Milo Bloom, 10, skis over a snowbank next to a parked car during the snowtorm Thursday in Portland, Maine. Robert F. Bukaty