By Tammie Souza

PHILADELPHIA (CBS) — Severe storms are possible Monday afternoon and evening as a cold front approaches the area. The atmosphere will be unstable with highs near 90 and dew points in the 70s.

Southeastern Pennsylvania has been upgraded to a Slight Risk for severe weather. South Jersey and Delaware are under a Marginal Risk.

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It will be uncomfortably muggy, hot, summer day. As the front approaches, isolated storms will form near the Lehigh Valley and slowly move eastward to the Shore.

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The window for storms is 4 p.m. to midnight. These will be slow moving storms that can produce 60 mph damaging winds, isolated tornadoes and torrential downpours that could lead to brief flash flooding.

Have a safety plan ready for you and your family.

Philadelphia Weather: Severe Storms Could Bring Damaging Winds, Downpours, Isolated Tornadoes On Monday

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Make sure kids know what to do if you are not at home and give special care to pets.