A strong area of low pressure tracked well offshore of the eastern seaboard, but tracked   close enough to eastern Long Island to bring heavy snow bands during the morning and early afternoon on Tuesday, March 13, 2018.  Snowfall rates were 1 to 2 inches per hour at times in the morning across eastern Long Island. A deep upper level trough over the northeast also aided in bringing lighter snow over the Lower Hudson Valley and portions of New York City, despite the low pressure tracking several hundred miles off the coast.

Winter Weather in ROCKLAND, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS and the public reported 2 to 4 inches of snow.

Heavy Snow in NORTHEAST SUFFOLK, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters, COOP observers, CoCoRaHS observers, and the public reported 6 to 12.5 inches of snow.  The highest amount was reported by a trained spotter in Orient with 12.5 inches of snow.

Heavy Snow in SOUTHWEST SUFFOLK, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The FAA Contract Observer at the Islip Airport reported 6.4 inches of snow. Trained spotters and the public reported 5 to 8 inches of snow.

Heavy Snow in SOUTHEAST SUFFOLK, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 18.3 inches of snow in Southampton. The public reported 10.3 inches of snow in East Hampton.

Winter Weather in SOUTHERN NASSAU, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts across southern Nassau ranged from 2 to 5 inches. However, there were isolated higher amounts around Plainview where a trained spotter reported 11.0 inches of snow.

Winter Weather in NORTHERN NASSAU, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters, CoCoRaHs observers, and the public reported 1 to 5 inches of snow. An isolated report of 6 inches was reported in Jericho by a trained spotter.

Winter Weather in ORANGE, NEW YORK
From 12-MAR-18 20:30:00 to 13-MAR-18 12:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observers, trained spotters, and the public reported 3 to 5 inches of snowfall. Isolated reports of 6 inches occurred in Monroe and Greenwood Lake.

Winter Weather in PUTNAM, NEW YORK
From 12-MAR-18 23:30:00 to 13-MAR-18 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer and a COOP Observer reported 4 to 5 inches of snow. An isolated 6.8 inch of snow report occurred 3 miles south of Fishkill by a CoCoRaHS observer.

Winter Weather in NORTHERN QUEENS, NEW YORK
From 13-MAR-18 00:00:00 to 13-MAR-18 13:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 2 to 4 inches of snow.

Heavy Snow in NORTHWEST SUFFOLK, NEW YORK
From 12-MAR-18 23:00:00 to 13-MAR-18 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An NWS Employee in Stony Brook reported 8.3 inches of snow. Trained spotters,  CoCoRaHS observers, and the public reported 6 to 11 inches of snow.