1:30 PM | **Slow-moving and intensifying storm to affect the Mid-Atlantic through the weekend*

Discussion

A slow-moving and major storm system will affect the I-95 corridor right through the weekend and in some areas (e.g., Philly, NYC), as long as into Monday morning. Up to three inches of rainfall is possible in some spots by the time the system winds down early on Monday. Intensifying low pressure is now centered over eastern Tennessee and it will move slowly along a stalled out frontal boundary zone to a position near the Delmarva Peninsula by early tomorrow morning. Rainfall will become steadier and heavier as evening approaches, continue heavily through much of the night, and then there will be additional periods of rain on Sunday and Sunday night in most of the Mid-Atlantic region as the storm grudgingly moves to a location off of the Mid-Atlantic coastline by later tomorrow night.

One other factor to mention with this upcoming major storm, colder air will wrap into the system during the day on Sunday with increasing northerly winds. It is not out of the question that snowflakes and ice pellets mix in with the rain later tomorrow and tomorrow night along the I-95 corridor as the storm hangs around; especially, in higher elevations in the far northern and western suburbs of the big cities – and perhaps there can even be a changeover to all snow in some of those interior, higher elevation locations with small accumulations. The overall weather improves dramatically later in the day on Monday and the “Tuesday/Wednesday/Thursday” time period looks quite nice with mild conditions throughout the Mid-Atlantic region.