Brrr, it's cold out there. If recent storms in the U.S. weren't enough of a sign, be assured that winter has arrived. Should the change in season mean grounding your bird until the swallows fly home to Capistrano? Winter flying has its own set of challenges, but also brings with it many rewards as long as a pilot is properly prepared. AVweb's Rick Durden takes on the season's challenges in a detailed discussion of the many planning and operational considerations pilots should think about this time of year.