NEW YORK (CBSNewYork) — A mix of sleet and freezing rain caused slick road conditions and delays at area airports on Monday evening, and the hazard was expected to continue overnight in many areas.

A winter weather advisory was to remain in effect until 6 a.m. for parts of southern Connecticut, and 7 a.m. for many upstate New York counties.

Snow fell all across the area Monday morning, and while the city only received a trace, spots such as Brewster, Putnam County; and Phillipsburg, N.J., received 1.5 inches.

But during the evening rush, icy pockets caused havoc on the roads in Westchester, Rockland counties, and in Northern, N.J. where temperatures were below freezing.

Due to the weather, departing flights were also subjected to ground delays at Newark-Liberty International, John F. Kennedy International, and LaGuardia airports.

Due to the continuing threat of freezing drizzle on top of snow, a risk for icy roads continued overnight – especially at higher elevations and on bridges and overpasses, CBS 2 Meteorologist Elise Finch reported.

A dense fog was expected in the overnight hours, and was expected to remain for the morning commute. The overnight low was expected to drop to 55.

CHECK: Traffic and Transit | Airport Conditions

CHECK: Radar | Forecast & Alerts | Listen: 1010 WINS | WCBS 880

Watch & Listen LIVE