A winter storm is on the way, bringing snow, sleet and freezing rain to the Delaware Valley over the course of just a few hours on Thursday.

A wintry mix that may begin as early as Wednesday afternoon will lead to icy roads, the National Weather Service warns.

The National Weather Service issued an updated winter weather advisory at 2:08 p.m. on Wednesday valid from 11 p.m. until Thursday 10 a.m. for Eastern Montgomery and Lower Bucks as well as Delaware and Philadelphia counties.

The National Weather Service has issued a Winter Weather Advisory for all of the region starting Wednesday night through Thursday morning. Freezing rain is expected across the region with some accumulation of ice expected overnight until temperatures rise above freezing on Thursday morning.

Millions from Iowa to Massachusetts are bracing for the storm, with alerts issued in D.C., Philadelphia, Hartford and Boston. A Winter Weather Advisory has been issued for the Philadelphia region and will go into effect at 11 p.