A long duration wintry weather event occurred on Thursday, February 18, 2021 through Friday, February 19, 2021. A frontal wave of low pressure developed off the Middle Atlantic coast on February 18, 2021. The frontal wave combined with a strong upper level to produce a brief period of moderate to heavy snowfall during the morning and early afternoon on Thursday, February 18, 2021. The snow also mixed with sleet at times during the late morning and early afternoon hours across portions of the New York City metro and Long Island. Snowfall rates of 1 inch per hour occurred with locally 2 inches per hour at times. The precipitation became light and changed to spotty freezing rain and freezing drizzle during the late afternoon through the overnight hours on February 18, 2021. The overall weather pattern did not change to much on Friday, February 19, 2021. Weak waves of low pressure continued to track along the frontal zone off the Middle Atlantic coast, combining with the lingering strong jet stream aloft to produce periods of mainly light snow. The light snow persisted into the early evening hours before tapering off just before midnight on Friday, February 19, 2021.

Winter Weather in ORANGE, NEW YORK
From 18-FEB-21 02:00:00 to 19-FEB-21 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 3 to 5 inches of snow.

Winter Weather in PUTNAM, NEW YORK
From 18-FEB-21 08:00:00 to 19-FEB-21 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nearby trained spotters in northern Fairfield County Connecticut reported 3 to 5 inches of snow.

Winter Weather in ROCKLAND, NEW YORK
From 18-FEB-21 06:00:00 to 19-FEB-21 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 3 to 5 inches of snow.

Winter Weather in SOUTHERN WESTCHESTER, NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 3 to 5 inches of snow.  The Westchester County Airport recorded 0.01 inches of freezing rain.

Winter Weather in NORTHERN WESTCHESTER, NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 3 to 6 inches of snow.  The nearby Westchester County Airport recorded 0.01 inches of freezing rain.

Winter Weather in BRONX, NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported 3 to 5 inches of snow.

Winter Weather in NORTHERN QUEENS, NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official NWS Observation at La Guardia Airport was 4.2 inches of snow. Trained spotters and the public 3 to 6 inches of snow.

Winter Weather in SOUTHERN QUEENS, NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official NWS Observation at Kennedy International Airport was 5.0 inches of snow. Trained spotters and the public 3 to 6 inches of snow.

Winter Weather in RICHMOND (STATEN IS.), NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported 4 to 5 inches of snow.

Winter Weather in NORTHERN NASSAU, NEW YORK
From 18-FEB-21 07:30:00 to 19-FEB-21 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 4 to 6 inches of snow. A locally higher amount up to 6.5 inches was reported in Syosset.

Winter Weather in SOUTHERN NASSAU, NEW YORK
From 18-FEB-21 07:30:00 to 19-FEB-21 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 4 to 6 inches of snow.  An NWS Employee also reported a trace of freezing rain in Plainview.

Winter Weather in NORTHWEST SUFFOLK, NEW YORK
From 18-FEB-21 07:30:00 to 19-FEB-21 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters, NWS Employees, and CoCoRaHS reported 4 to 6 inches of snow. A CoCoRaHS observer reported a locally higher amount of snow to 6.8 inches in East Northport.  The nearby Islip Airport ASOS recorded 0.17 inches of freezing rain.

Winter Weather in SOUTHWEST SUFFOLK, NEW YORK
From 18-FEB-21 07:30:00 to 19-FEB-21 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official NWS Observation at the Islip Airport was 5.3 inches of snow. Trained spotters, NWS Employees, and the public reported 4 to 6 inches of snow.  The Islip Airport ASOS recorded 0.17 inches of freezing rain.

Winter Weather in NORTHEAST SUFFOLK, NEW YORK
From 18-FEB-21 09:00:00 to 19-FEB-21 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters, and NWS Employees reported 3 to 6 inches of snow. A locally higher amount of 7.1 inches was reported by a trained spotter in Mattituck.  The nearby Westhampton Beach ASOS recorded 0.18 inches of freezing rain.

Winter Weather in SOUTHEAST SUFFOLK, NEW YORK
From 18-FEB-21 08:00:00 to 19-FEB-21 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and the public reported 3 to 6 inches of snow.  The Westhampton Beach ASOS recorded 0.18 inches of freezing rain.

Winter Weather in KINGS (BROOKLYN), NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media, trained spotters, and the public reported 3 to 5 inches of snow. Broadcast media also reported 0.13 inches of freezing rain 1 mile south-southwest of Flatbush.

Winter Weather in NEW YORK (MANHATTAN), NEW YORK
From 18-FEB-21 07:00:00 to 19-FEB-21 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official NWS Observation at Central Park was 4.4 inches of snow. The Central Park ASOS also recorded 0.08 inches of freezing rain.