CNE/NNE will wait until the block relaxes some, I don't see any chances until after the 15th or so up here, 12/12 looks to be more of a SNE deal down thru NY.
Just looking briefly because i've been extremely busy, It looks like its rehashing all the same scenarios over and over again for the next 3 systems, Carry on, See you soon..........
Better clown maps coming............
GFS overestimates the accumulated snow depth for mixed precipitation events with marginal temperatures and underpredicts for events with very cold temperatures. The undesired snow depth predictions are associated with GFDL microphysics and the improper density used in the Noah land surface model for different frozen precipitation types. In this upgrade, the land surface model is addressed first by providing proper density to various frozen hydrometeors.
A mega block is not a requirement up here, Actually, We can get away with none and have before but it does slow systems down to give the big dog potential which usually end up further south.