Friday will feature essentually a very stormy day. Rain at the immediate coast and snow in the mountains with mix in between.

Going in depth a little more… A low will intensify as it moves NE out of the Ohio valley and into New England Friday morning. Snow will overspread the region Thursday night and will stay snow across the entire forecast area untill ~8am. This is where the forecast becomes very tricky. The coast south of Portland will experiance the changeover first with rain overrunning that area and remaining locked in place as warm air pushes north. Meanwhile a secondary low undergoes cyclogenesis over Cape Cod. Depending on how strong this low gets, the warm air could stall or even retreat slightly.

         There are 3 dominant senarios for the secondary low development: 1) 2nd low deepens more rapidly and pulls in significant cold air therefore resulting in more significant coastal snows. 2) 2nd low fizzles and gets absorbed by intensifying main low therefore pulling in little to no cold air resulting in minimal coastal snows and hevier upslope snow. 3) 2nd low deepens at a marginal rate resulting in a moderate amount of cold air being pulled in and causing the warm air to be bottled up resulting in a sharp coastal front with a steep temperature difference. The exact placement of this front will likely determine the rain snow line if senerio 3 plays out

Stay tuned!

-JAck