Fata Morgana in Mountains of Montana
December 27, 2016
Note the fog in the mid-ground that resulted when the temperature in the valley dropped below the dew point. A layer of relatively warm air lies above the cool air that drained into the valley overnight. This classic temperature inversion allowed the sorceress to do her handiwork. In reality, all mirages are due to refraction (bending, redirecting) of light from distant objects. As light waves pass through layers of air that have different densities and temperatures, the waves change direction. In this case, the strange looming shapes are the result of light waves from the distant mountains that are bent downward as they traveled through different layers of air to the viewers' eyes.