I have been seeing some of the same questions posted wrt patterns lately and been getting some PMs about it so I thought I would post some stuff I have been working on for a while wrt snow climo and patterns.  Others can add to this also.  I did a study of all warning level snowfall events at BWI going back to 1948 and I will post the results below but first I thought I would give some info. One disclaimer:  most of this research and information is focused on warning criteria snowfalls.  We