Here we go again: the first snow of the year, and the crazy sky color effect - see http://twitpic.com/16ztir - is back, in the middle of the night. Still clueless regarding the precise optics involved but guessing that some (close-by? distant?) sodium lights must be multi-reflected by snowy landscape and atmosphere.

Here we go again: the first snow of the year, and the crazy sky color effect - see http://twitpic.com/16ztir - is back, in the middle of the night. Still clueless regarding the precise optics involved but guessing that some (close-by? distant?) sodium lights must be multi-reflected by snowy landscape and atmosphere.