12Z GFS model run takes a major step towards the Euro ie a big storm much closer to the Northeast US coast.  The storm moves from Cape Hatteras, NC early Friday (below #1) to off the southern New England coast by late Friday night (below #2). 

Looking like a southern New England special (e.g. Boston) for massive amounts of heavy snow!  NYC and Long Island are still in the game for possibly a mixture changing to significant accumulating snow.  Philly area on the edge between rain, ice and/or snow which could become accumulating snow on the back end.

A very crucial player to the whole scenario is a strong, cold high pressure system to the north (SE Canada).  That alone is a cause for concern with respect to ice and/or snow as far south as the interior Mid-Atlantic.  Total precipitable water amounts for the storm on bottom map.  Stay tuned.

Paul Dorian/Meteorologist

The SI Organization, Inc.

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