Our friends out of Boston..
Potential for a winter storm still on the map but still a lot of
uncertainty on how it all plays out given it is still a Day 5/6
forecast. Lots of spread in low track among ensemble guidance and
there are timing issues as well. System responsible for the storm
still over the central Pacific and it will take until Mon or Tue
before it is better sampled by upper air network in US. The extent
of downstream ridging over north Atlantic also a factor to how
amplified this system becomes and how strong and how close it tracks
to New Eng. Deep cold air is firmly in place suggesting all snow
event, except for portions of SE New Eng where some rain could get
involved if storm track gets close to New Eng