“Snow, black ice, rain and wind are a bad combination,” he said in a statement.

Sunday morning’s wintry mix of snow and freezing rain turned into rain by the evening. By midday Monday, the rain will turn back to snow, forecasters at the National Weather Service said.

[Read more here about how the storm is affecting the greater Northeast.]

Early on Sunday morning, the icy conditions caused some travel mishaps. At Buffalo Niagara International Airport, a Delta Air Lines plane flying in from La Guardia Airport slid off the taxiway because of ice, according to local news reports. No injuries were reported.

The Twitter account for the New York State Police said troopers had responded to more than 500 storm-related crashes around the state and urged drivers to stay home if possible.

The New York State Thruway Authority’s Twitter account said the speed limit on the road would be reduced “from exit 45 to exit 19 until further notice.” The authority announced that the speed limit on the Governor Mario M. Cuomo Bridge had been reduced to 35 miles per hour in both directions.

The National Weather Service issued storm warnings for much of the lower Hudson Valley, southern Connecticut and northeast New Jersey, which could see one to two inches of snowfall per hour for parts of Sunday and Monday.

“We want everybody to take it safe today before the worst of it hits us,” said New Jersey Gov. Philip D. Murphy at a news conference on Sunday morning.

Travelers should not expect any major issues with New Jersey Transit, according to the state’s Department of Transportation.