Ten-Years Ago (04-December-2007) — Colorado Boulder: Evening Storm Clouds This was the second night in a row that we had unique storm clouds at sunset. Orange and Black Clouds Over Boulder. Image taken with a Nikon D300 camera and 17-35 mm f/2.8 lens (ISO 200, 35 mm, f/11, 1/8 sec). (David J Mathre)