Typically this happens in the interior of large continents, in a protected river valley or on mountain slopes shrouded in mist.

BBC: The quest to see China��s extraordinary frozen fog

After a four-hour search in mist and darkness by Killin Mountain Rescue Team, the man was found several kilometres south of Beinn Each.

BBC: Rescuers warning to hill walkers

Even in the flagging soda biz, Mountain Dew Code Red (sales surged 232% in January and February) and Diet Sierra Mist (ahead 50%) are winners.

FORBES: Magazine Article