As a ridge of high pressure extending from north of the Great Lakes southeast across southern New England moved slowly northeast, a low pressure system developed off the Carolina coast.  As this low moved north to northeast just off the mid Atlantic coast, it rapidly intensified during Wednesday morning.  This low moved across eastern Long Island during the early afternoon hours.
These systems produced snow, sleet, freezing rain, rain, strong gusty winds, and minor tidal flooding across the region.
Light snow developed from southwest to northeast during Tuesday evening between 5 p.m. and 10 p.m.  It mixed with sleet and freezing rain, first across eastern Long Island between midnight and 3 a.m. and then across the remainder of the area between 3 a.m. and 6 a.m.  By 6 a.m., a mixed bag of sleet and freezing rain occurred everywhere with temperatures ranging from the lower 30s across eastern Long Island, to 10 degrees in the Lower Hudson Valley, to 19 degrees at Central Park.
As the deepening low moved more to the northeast, cold air was locked in west of the storm track, prompting the issuance of Ice Storm Warnings for Brooklyn, Queens, Nassau, and NW Suffolk between 10 a.m. and 10:15 a.m.  Six hour precipitation totals between 7 a.m. and 1 p.m. were between 0.50 and 0.75 inches.  This fell as mainly plain rain across the twin forks, and much of Suffolk County; a combo of sleet and freezing rain fell across Nassau; and mainly sleet with some freezing rain elsewhere including NYC.

Winter Storm in QUEENS, NEW YORK
From 13-FEB-07 19:00:00 to 14-FEB-07 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet during the early morning hours. A moderate to heavy sleet developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of sleet caused major mass transit problems along with severe delays at the major airports.

Winter Storm in QUEENS, NEW YORK
From 13-FEB-07 19:00:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet during the early morning hours. A moderate to heavy sleet developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of sleet caused major mass transit problems along with severe delays at the major airports.

Winter Storm in SOUTHERN WESTCHESTER, NEW YORK
From 13-FEB-07 21:00:00 to 14-FEB-07 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet and freezing rain during the early morning hours. A moderate to heavy mix of snow, sleet and freezing rain developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of snow and ice caused major mass transit problems, especially during the morning and evening commutes.

Ice Storm in NASSAU, NEW YORK
From 13-FEB-07 21:00:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet and freezing rain during the early morning hours. A mixture of heavy sleet and freezing rain developed Wednesday morning, Feb. 14, and continued through noontime before ending as some light snow. A significant accretion of ice, especially across the northern half of the county, where nearly half an inch of ice accumulated on tree limbs, power lines, and roadways. In addtion, this was further compounded by 1 to 2 inches of accumulated sleet. This resulted in major mass transit problems.

Winter Storm in KINGS (BROOKLYN), NEW YORK
From 13-FEB-07 19:00:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet during the early morning hours. A moderate to heavy sleet developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of sleet caused major mass transit problems along with severe delays at the major airports.

Ice Storm in NORTHWEST SUFFOLK, NEW YORK
From 13-FEB-07 21:00:00 to 14-FEB-07 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Light snow began during the late evening on Tuesday Feb. 13, then quickly changed over to a mix of snow, sleet and freezing rain. A heavy freezing rain developed Wednesday morning, Feb. 14, and continued until around noontime before ending as some light snow in the late afternoon. Ice accumulated to 0.5 inches across northwest Suffolk County with severe icing on roadways, tree limbs, and power lines. This resulted in major mass transit problems during the morning rush hour.

Winter Storm in NEW YORK (MANHATTAN), NEW YORK
From 13-FEB-07 20:00:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet during the early morning hours. A moderate to heavy sleet developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of sleet caused major mass transit problems along with severe delays at the major airports.

Winter Storm in ORANGE, NEW YORK
From 13-FEB-07 20:54:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A mixture of heavy snow, sleet, and freezing rain fell across the county from late Tuesday evening, Feb. 13, through Wednesday afternoon, Feb. 14. Snow and ice totals ranged from 6 to 8 inches.

Winter Storm in BRONX, NEW YORK
From 13-FEB-07 20:00:00 to 14-FEB-07 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow began during the late evening on Tuesday Feb. 13, then mixed with sleet during the early morning hours. A moderate to heavy sleet developed Wednesday morning, Feb. 14, and continued into the early afternoon before ending as some light snow. The accumulation of 2 to 4 inches of sleet caused major mass transit problems along with severe delays at the major airports.