An area of low pressure is rapidly developing to our south and spreading moisture into New England. A cold high pressure system to our north is retreating but not after it places enough cold for most to see snow as the storm starts. For most in Eastern Massachusetts the snow will flip to rain quickly as a stiff east wind is coming in off a relatively warm ocean. Water temps just offshore are all in the mid to upper 40s…that air will offset the cold and rain will be the big player for most inside of Rt. 128. Beyond 128, it will take a little longer for the milder ocean air to arrive…this means a lengthier period of snow and sleet…1-3″ from 128 to just inside 495. From 495 west and north there will be a rapid rise in snow amounts…this is where the warm ocean air will have a very tough time penetrating, thus snow will be intense and pile up with the mountains and higher terrain of Interior New England getting walloped.
The track of the surface low will pass over SE Mass…this will not only change much of Eastern MA to rain during the overnight but it will also allow for warmer air to work in aloft changing snow in Central and Northern MA to sleet and or some freezing rain…in fact the all snow zone will likely be close to Manchester, NH. Once the precip changes to rain, it will be heavy and windswept with much if not all of the snow in Eastern MA turning to slop then washing down the drain.
Winds will howl early tomorrow morning also as the storm center closes in on the South Coast…gusts could exceed 50 mph and scattered power outages are likely. The storm will slowly pull away during the day and rain will taper off as flurries Thursday evening.
Another storm will try to take shape over the weekend. It isn’t a question of who gets rain and who gets snow but will it hit us at all…it will be cold enough for all snow with whatever we get. Right now the track is grazing us with some snow Saturday night into Sunday morning.