A winter storm is set to have a major impact on the Philadelphia area and Delaware Valley Monday, with 3-5 inches of snow​ expected in the city and surrounding counties.

Here is the hourly forecast for snow estimates in Philadelphia, New Jersey and Delaware ahead winter weather warnings and significant snowfall Monday.

There is a Winter Storm Watch throughout the Philadelphia region from Saturday night through Sunday. The Winter Storm Watch can become either a Winter Storm Warning or a Winter Weather Advisory on Sunday depending on the track.