Campers often expect campfire smoke to rise straight up or drift gently with the wind, but mountain valleys behave very differently. Their narrow walls, shifting temperatures, and irregular terrain ...

If you are sitting in the wrong spot, the prevailing wind blows smoke directly in your face. This horizontal movement is called advection. Small fires often don’t generate enough heat to loft their ...

Have you ever been sitting around a campfire, get up and move, only to have the smoke you were trying to avoid follow you? Well, as Ray Petelin explains, there's a scientific reason for that!

Add Yahoo as a preferred source to see more of our stories on Google. Satellite shows dense wildfire smoke blanketing the Northwest on Tuesday morning, with a plume of light to moderate smoke moving ...