Areas of fog will reduce visibility early Friday, so allow some extra time as you head out. Fog could be dense in spots, with ...

In the wake of a cold front that crossed the state Saturday evening, cooler and drier air filtered into the region.

Overnight: Humidity is expected to slowly climb, which could lead to patchy fog by morning, Storm Center 7 Chief Meteorologist McCall Vrydaghs said. Outside of any fog, skies will remain mostly clear ...

We can get two main types of fog here in Northern Illinois. Advection fog and radiation fog. Advection fog forms when warm, ...

It's the cool water from the California Current and upwelling that usually allows the dense coastal fog to form. The ocean water is cooler than the air above it, and lowers the air temperature down to ...

Dense fog is expected to clear Wednesday morning, but heat indexes could reach the mid- to upper 90s Sunday and Monday.