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Dense fog advisory for Delaware, Philadelphia counties Saturday morning

National Weather Service warns of limited visibility early Saturday; advisory effective 5:29–8 a.m.

Published Mar 21, 2026, 5:32 AM EDT | LehighValleyLive

A dense fog advisory was issued by the National Weather Service on Saturday at 5:29 a.m. in effect until 8 a.m. for Delaware and Philadelphia counties.

The weather service adds to expect, "Visibility as low as one quarter mile in dense fog."