A slow moving coastal storm impacted all of eastern New York with a variety of winter weather starting on Tuesday, December 9th and continuing through early in the day on Thursday, December 11th.
An area of low pressure developed off the Mid-Atlantic coast on Tuesday, December 9th.  With cold air in place at the surface, the precipitation initially began as freezing rain and freezing drizzle during the early morning hours.  Some sleet also mixed in, especially over the higher elevations.
As surface temperatures slowly warmed above freezing, the precipitation changed to a plain cold rain for valley areas and fell heavily at times by the afternoon. High terrain areas continued to see a wintry mix of snow, sleet and freezing rain.
Towards evening, the heavy nature of the precipitation allowed precipitation to change to snow for the Capital Region.  Snow fell at rates of several inches per hour and was even accompanied by lightning and thunder in some locations.  While other valley areas continued to see a cold rain, snow and a wintry mix continued over the higher elevations through the evening hours.
On Tuesday night, precipitation varied between rain, snow and a wintry mix, depending on elevation and precipitation intensity. However, with colder air working into the area aloft, precipitation began to change to mainly snow for during the day on Wednesday, especially for areas from the Capital Region on north and west. The snow was steadiest during the afternoon and evening hours, with snowfall rates close to one inch per hour at times.
Precipitation began to taper off to just snow showers for Wednesday night and ended by Thursday morning.  By the end of the storm, snowfall amounts greatly varied from just a few inches in the mid-Hudson Valley to nearly two feet in the Catskills and Helderbergs. Parts of the Capital Region, Mohawk Valley, Adirondacks and Lake George region saw six to twelve inches of snow in total.
The heavy, wet snow associated with long duration event caused some traffic accidents and power outages across the region, especially in Saratoga and Washington Counties.  Many schools were delayed or cancelled due to the wintry weather.

Winter Storm in HAMILTON, NEW YORK
From 09-DEC-14 11:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in SOUTHERN FULTON, NEW YORK
From 09-DEC-14 07:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in SOUTHERN SARATOGA, NEW YORK
From 09-DEC-14 06:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in SCHOHARIE, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in WESTERN ALBANY, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in WESTERN SCHENECTADY, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in EASTERN SCHENECTADY, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in EASTERN ALBANY, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in SOUTHERN WASHINGTON, NEW YORK
From 09-DEC-14 07:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in NORTHERN WASHINGTON, NEW YORK
From 09-DEC-14 10:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in WESTERN RENSSELAER, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in EASTERN RENSSELAER, NEW YORK
From 09-DEC-14 04:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in WESTERN GREENE, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in NORTHERN SARATOGA, NEW YORK
From 09-DEC-14 08:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in SOUTHEAST WARREN, NEW YORK
From 09-DEC-14 09:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in MONTGOMERY, NEW YORK
From 09-DEC-14 06:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in SOUTHERN HERKIMER, NEW YORK
From 09-DEC-14 07:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in NORTHERN HERKIMER, NEW YORK
From 09-DEC-14 11:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in NORTHERN FULTON, NEW YORK
From 09-DEC-14 08:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Storm in NORTHERN WARREN, NEW YORK
From 09-DEC-14 11:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN ULSTER, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN ULSTER, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 04:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN DUTCHESS, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 04:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN DUTCHESS, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 04:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN GREENE, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 04:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN COLUMBIA, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 04:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN COLUMBIA, NEW YORK
From 09-DEC-14 03:00:00 to 11-DEC-14 06:36:00 (EST-5)
Reported by: Trained Spotter