By Justin Drabick

PHILADELPHIA (CBS) — Philadelphia will be on the northern edge of the snow, so the highest amounts will be to the South.

Overnight, temperatures will drop into the 20s, so any snow that falls will stick to untreated surfaces.

The heaviest snow will occur overnight through about 8 a.m. Monday. Expect a slower commute with reduced visibility. The snow will begin to taper off by mid-morning, bringing improving conditions later in the morning and afternoon. Monday’s high temperatures stay well below average only in the mid 30s.

Winter storm warnings are in effect for southern NJ and all of Delaware. Winter weather advisories are in effect for Philadelphia and surrounding PA suburbs. The track is critical for snow amounts since there will be a sharp cutoff right around the Delaware Valley. This depends on where the strong high pressure area to our north sets up. A last minute 50 mile change in track could mean getting no snow at all or more than expected. As of Sunday evening, southern NJ and central and central DE can expect 3-6″ Areas in Cape May county and Kent county Delaware could see locally higher amounts, if heavy snow develops. Expect 1-3 inches for Philadelphia and surrounding suburbs. Areas farther north will see little if any accumulation.

Justin Drabick