from
http://www.mattnoyes.net/new_england_weather
As for cold air, maybe enough draining south for high elevation mountain snow in NH and ME, but that should be about it. As for flooding, heaviest precip axis is south of the snowpack and with precip broken into two chunks, there will be time for runoff. Some snowmelt may result in minor flooding for North Country, but I don't see a widespread event.
Sunday still looks the same as it did before, and Monday I'd mentioned in passing it could be cooler than Sunday - looking like a good bet with the northeast flow and cool Canadian air advecting south while lots of moisture gets locked in the lower levels for plenty of clouds and perhaps even a day of drizzle and light rain.