A surprise snowstorm has walloped Westchester County forcing the closure of one roadway and delays of many schools due to the icy accumulation.

Last evening, portions of the Saw Mill River Parkway had to be shut down following numerous accidents and spinouts as DPW crews moved in to salt down the treacherous roadway.

Snow began falling around 10 p.m. Monday night and continued through the night, causing many road crews to scramble to the get roads in passable condition in time for the morning rush. Numerous schools in Westchester opened on a 1-2 hour delay due to the inclement weather.

The speed limit on the Tappan Zee Bridge was lowered to 45 miles per hour.

Forecasters say the worst is behind us, but the National Weather Service says there remains a 20% chance of snow showers today.

Police are reminding motorists to give themselves plenty of time to get to their destinations and to drive slowly and be on the alert for possible black ice on the roadways.