Yesterday afternoon the clouds thickened and dimmed the sun, and our high temperature struggled only into the mid-50s. What cloud was that? Here it is, with Twin Peaks on the horizon. Our names for clouds, originating with English pharmacist, Luke Howard, are based on visual attributes from the ground. Here, “Altostratus” (As) does RESEMBLE its… Continue reading Altostratus: a misunderstood cloud and for good reason
Category: Ice crystals
Arizona: Colorado temperatures, Colorado clouds
It was a mind-boggling, hiking-challenging -30 F at Grand Canyon AP yesterday morning. Overhead of Flagstaff, at 5 AM MST yesterday it was -38 C (-36 F) and that temperature was the lowest temperature at 500 millibars in all of the US. It is really, really rare to see -38 C over Arizona! … Continue reading Arizona: Colorado temperatures, Colorado clouds