* WHAT...Heavy snow expected. Total snow accumulations between 3 and 6 inches.

* WHERE...Portions of southern New Jersey and southeast Pennsylvania.

* WHEN...From 1 AM Monday to 1 AM EST Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions will impact the Monday morning and evening commutes.

* ADDITIONAL DETAILS...Snow will overspread the region late Sunday night and intensify through Monday morning, potentially coming down at rates approaching 1 inch per hour for a brief period. It will then gradually taper off Monday night.