Forecast weather for Monday, March 18. 2013.

Snow/ rain mix for New York, New Jersey metro changing to plain rain.  Some ice / sleet possible.  New England gets heavy snow.

From Upton, NY, NWS:

 

There is still some uncertainty as to exactly how much snow/sleet 
will fall before change over to freezing rain...and how long the 
freezing rain will linger into Tuesday morning. Because of these 
uncertainties and that the freezing rain will be occurring during 
morning rush hour - have a 30 percent chance that a Winter Storm 
Warning could be needed - so will highlight this threat over the 
interior in the severe weather potential statement.