Areas of fog will greet us Friday morning, some will be locally dense, so take it slow during the morning commute.
Warm air made a spring-like grand entrance back into the area today with a band of heavy rain and thunderstorms.
Fog prevented visibility beyond a couple of hundred yards, at best.
The foggy weather threw a wrench into air travel on the East coast, resulting in flight delays and cancellations.
It’s lurking in the nation’s sewers, and even as close as the sewage line that runs from your house to the main. It’s called FOG — for accumulated fats, oils and grease. In Philly, it’s FROG, since the water department includes tree roots.