by Anjelica Partridge CHATTANOOGA, Tenn (WTVC) - Many people driving across the Tennessee Valley noticed a hazy look in the skies Friday afternoon. The area's surrounding mountains look a bit foggier than normal. And there is a pretty unusual explanation for that.NewsChannel 9's David Glenn says the hazy appearance is being caused by a dust plume that originated in Kansas, Nebraska and Oklahoma because of strong winds there Thursday. And some of that dust has made it hundreds of miles across the country, to the Tennessee Valley. Glenn says that wind speeds should pick up this Friday afternoon, and clear most of the dust out.