If you're wondering whether winter storm Niko will affect your flight, the answer is nearly certainly yes, provided you're flying into or out of one of the cities impacted by the storm.
A combined 115 flights were cancelled in and out of San Francisco by 10 a.m., duty manager Bob Rotiski said. Storm Team 4 breaks down the timeline here. More than a dozen accidents were reported before 9 a.m., he said.
"A Blizzard Warning is now in effect for Nassau and Suffolk County". By mid-morning, 6.4 inches had accumulated in Danbury and Newtown.
Temperatures were expected to fall to single-digit Fahrenheit levels (below -12.8 C) overnight in the Boston area.
Wednesday saw temperatures of almost 60 degrees in New York City, and Thursday will be a little, er, different.
Alternate-side parking is suspended to facilitate snow-removal operations. By 7:20 a.m., Central Park had already recorded 2 inches of snow, and heavy flakes blanketed Times Square. "We are asking folks to stay off the roads tomorrow and not travel unless absolutely necessary", he said. "Visibility in many areas is down to a quarter-mile", Gov. Charlie Baker said earlier this afternoon from the bunker of the Massachusetts Emergency Management Agency in Framingham."This is a large, but fairly typical annual event", Baker said.
The storm has affected several major freeways along the northeast corridor - including Interstates 68, 70, 76, 78, 80, 81, 83, 84 and 95.
The flight-tracking site FlightAware.com says more than 2,000 flights for Thursday have been canceled.
A low pressure system, impacting much of the Atlantic coast, is bringing heavy snow to the New England states, as well as the the northern Appalachians, according to the National Weather Service.
The storm is so rapidly intensifying with winds gusting to 45 miles per hour that it is "making air travel hard, if not impossible", the Capital Weather Gang reported. In Suffolk County, Bellone said up to 50 miles per hour gusts were reported. At least one woman used skis to get around. A winter storm warning is in effect, covering the entire state.
The change in weather follows a spring-like day when much of the Northeast was enjoying 60 degree temperatures.
Samhuel said the temperature in Boston is now 20 degrees and it will be dipping into the teens very shortly, dropping into single digits by early evening.