850mb temperatures will drop to near -30 to -40 C across the SNE region.  Cape and Islands could see a nasty band of ocean enhanced snowfall as a large upper low develops a surface low to the east of Maine and drops southeastward.  The location of this surface low will determine how close the band can get to the Cape and Islands later Friday.  With the massive cold pool aloft, winds will bring a ton of moisture, question becomes how strong will the lift become, and snow growth.  Right now, it is a toss up! DAMN!