Trent Nelson | The Salt Lake Tribune From Ensign Peak, the view of an inversion over Salt Lake City. Tuesday, December 7, 2010.Trent Nelson | The Salt Lake Tribune From Ensign Peak, the view of an inversion over Salt Lake City. Tuesday, December 7, 2010.Trent Nelson | The Salt Lake Tribune From Ensign Peak, the view of an inversion over Salt Lake City. Tuesday, December 7, 2010.Trent Nelson | The Salt Lake Tribune From Ensign Peak, the view of an inversion over Salt Lake City. Tuesday, December 7, 2010.