Most winter visitors to Tucson come here specifically to escape the cold; sunshine and temperatures in the 60's and 70's lure the 'snowbirds.' But winter pays the occasional visit to the cactus-studded landscape. Although snow rarely falls all the way down to the desert floor, the mountains regularly turn white. On this particular January morning, I thought that the storm might clear just in time for sunrise. I ran out the door with the camera, skipping breakfast. When the clouds lifted, there was the combination of cactus, snowcapped peaks, and rainbow: perfect.