Just one comment...as a long-time reader and life long resident of Carroll and Frederick counties...there is no rain shadow/downslope/orographic effect created by the Catoctin Mts; they're simply not high enough. Emmitsburg, Frederick and Thurmont receive less snow than Westminster/Manchester merely due to minor elevation changes. IF there was this sort of effect, Wolfsville would benefit from upslope in a similar fashion to DCL.