How does fog form?

Weather 101: What Causes Fog?

What is fog?

Videocast: Dense fog to start the day

Chicago Weather Alert: Dense Fog Advisory, rain and ice threat lingers

Delhi's Cold Wave: Dense fog Engulfs City And Trains, Flights Affected; What Causes It?

Dense Fog Advisory

Dense fog advisory in effect

Dense fog, warm temps to start the week

Dense fog to start but more sunshine is on the way

Dense fog to start but sunshine is the story this forecast

Dense Fog Advisory, weekend rain and storms

Dense Fog Advisory Extended

Patchy Dense Fog Tonight, Calm Start to Work Week

Dense Fog Advisory

Dense Fog Advisory before strong afternoon storms get going

Dense fog across the Valley

Forecast: Chilly Start With Dense Fog

Dense fog to start your work week

Dense fog is already developing