During the afternoon of Monday, March 18th, an area of low pressure moved towards the eastern Ohio Valley.  Precipitation well out ahead of the storm's warm front moved from southwest to northeast across the region.  With enough cold air in place, the precipitation fell in the form of snow during the evening hours. By just after midnight on Tuesday, March 19th, the steady precipitation ended or changed to patchy areas of freezing drizzle or sleet for areas from the Mohawk River southward. Meanwhile, steady snowfall continued across the Adirondacks and Lake George-Saratoga Region for the remainder of the overnight hours.
At the same time, another storm system began to develop along the mid-Atlantic coast.  This low pressure took a track just off the Northeast coast.  The track of this storm allowed some additional moisture off the Atlantic Ocean to be drawn into the region.  During the daylight hours on Tuesday, March 19th, an additional batch of steady snowfall developed across the entire region, as an upper level shortwave moved overhead.  While some additional snow accumulated, the strength of the March sun helped limit the amount of the accumulations, especially on paved surfaces.  Some additional snow showers and squalls lingered into the evening hours, before tapering off for Tuesday night.
At the end of the storm, snowfall amounts ranged from just 2 to 5 inches across parts of the mid-Hudson Valley and Taconics to 10 to 15 inches across the Sacandaga and Saratoga Regions. Most parts of the eastern Catskills and Capital Region received 5 to 9 inches of snow.

Heavy Snow in SOUTHERN WASHINGTON, NEW YORK
From 18-MAR-13 20:00:00 to 19-MAR-13 22:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN ULSTER, NEW YORK
From 18-MAR-13 16:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN ULSTER, NEW YORK
From 18-MAR-13 16:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN DUTCHESS, NEW YORK
From 18-MAR-13 16:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN DUTCHESS, NEW YORK
From 18-MAR-13 16:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN GREENE, NEW YORK
From 18-MAR-13 17:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN COLUMBIA, NEW YORK
From 18-MAR-13 17:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN GREENE, NEW YORK
From 18-MAR-13 17:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN COLUMBIA, NEW YORK
From 18-MAR-13 17:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in SCHOHARIE, NEW YORK
From 18-MAR-13 17:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN ALBANY, NEW YORK
From 18-MAR-13 17:30:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in SOUTHERN HERKIMER, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in MONTGOMERY, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN SCHENECTADY, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN ALBANY, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in WESTERN RENSSELAER, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN RENSSELAER, NEW YORK
From 18-MAR-13 18:30:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in SOUTHERN SARATOGA, NEW YORK
From 18-MAR-13 19:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in NORTHERN WASHINGTON, NEW YORK
From 18-MAR-13 21:00:00 to 19-MAR-13 22:00:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in EASTERN SCHENECTADY, NEW YORK
From 18-MAR-13 18:30:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Winter Weather in NORTHERN HERKIMER, NEW YORK
From 18-MAR-13 19:00:00 to 19-MAR-13 18:40:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in SOUTHERN FULTON, NEW YORK
From 18-MAR-13 18:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in NORTHERN FULTON, NEW YORK
From 18-MAR-13 19:00:00 to 19-MAR-13 12:50:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in HAMILTON, NEW YORK
From 18-MAR-13 19:30:00 to 19-MAR-13 18:40:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in NORTHERN SARATOGA, NEW YORK
From 18-MAR-13 19:30:00 to 19-MAR-13 22:00:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in SOUTHEAST WARREN, NEW YORK
From 18-MAR-13 20:00:00 to 19-MAR-13 22:00:00 (EST-5)
Reported by: Trained Spotter

Heavy Snow in NORTHERN WARREN, NEW YORK
From 18-MAR-13 20:30:00 to 19-MAR-13 22:00:00 (EST-5)
Reported by: Trained Spotter