Have you ever looked up at the sky and noticed how clouds often form in distinct layers, with some huddled close to the ground while others seem to float high above? The stratification of clouds in ...

Douglas Kreutz Feb 23, 2018 Feb 23, 2018 Updated Mar 9, 2018 Southern Arizona skies have hosted a sort of Festival of Clouds over the past week — with the overhead show serving up everything from ...