A Significant Winter Storm Will Impact Western & Central Mass From Sun Afternoon Through Mon Night

For The Rest Of Today: A large high pressure system centered over Ontario will give the entire area a sunny to partly sunny rest of the day. High temperatures this afternoon will be near 40 Degrees. Northwest winds will gust up to 20 to 30 mph at times.

Tonight Through Saturday: An area of high pressure will move right over our area during tonight and Saturday.

Clear to partly cloudy skies are expected tonight with low temperatures near 20 Degrees.

Saturday will be sunny to partly sunny with high temperatures between 35 and 40 Degrees.

A Significant Winter Storm Will Impact Western & Central Mass From Sunday Afternoon Through Sunday Night, Monday & Monday Night: A significant and long duration winter storm is expected to impact Western and Central Mass starting Sunday afternoon and continuing through all of Sunday night, all of Monday and much of Monday night. The storm looks to come to an end early Tuesday morning.

It should be noted that there is still quite a bit of uncertainty with the exact low pressure track and the temperature profile of the atmosphere. An area of low pressure is expected to develop near Delaware and New Jersey Sunday afternoon and then move northeastward reaching either southeastern Mass or Nantucket during Monday. It then looks like this storm system will slowly move east-northeastward towards Nova Scotia late Monday night and Tuesday.

Snow is expected to overspread Western and Central Mass between about 1 pm and 3 pm Sunday afternoon and then continues throughout the rest of Sunday afternoon.

On Sunday night, there is a considerable amount of uncertainty as to how far north milder air will move and thus how far north the snow to sleet/freezing rain line will move. The higher resolution weather forecast guidance shows the snow changing to a period of sleet and freezing rain as far north as the Mass Pike while some of the other model guidance keeps much of Western and Central Mass as all snow throughout all of Sunday night. One factor that makes me think that we will see some freezing rain and sleet on Sunday night is that the ocean water temperatures are relatively warm & the wind direction will be an easterly direction allowing for this ocean modified air to cause the snow to change to freezing rain and sleet.

On Monday, as that storm system begins to depart, it will pull down some cold air causing everybody to changeover to all snow during Monday afternoon and Monday night. I do have concerns that bands of moderate to heavy snow may set up somewhere across the region leading to locally higher snow accumulations than are currently forecast.

Here Is A Break Down On What I Think May Happen With This Storm: I think that this will be a 3 part storm:

Part 1 is when the snow begins across Western and Central Mass between about 1 pm and 3 pm Sunday afternoon and continues for several hours Sunday afternoon into Sunday evening.

Part 2 is I think that the intensity of the precipitation will lighten up dramatically from about midnight Sunday night into Monday morning. This precipitation looks to be light snow north of the Mass Pike and a mixture of light snow, sleet and freezing rain along and south of the Mass Pike.

Part 3 Of This Storm will occur from Monday afternoon through Monday night when the light mixture of snow, sleet and freezing rain changes to all snow during Monday afternoon. In addition, the intensity of the snow will increase and the snow may fall at a moderate to heavy rate at times. In addition, some bands of locally heavier snow may occur late Monday afternoon and Monday night. Where exactly these heavy snow bands set up remain to be seen & it is something that is almost impossible to forecast until the storm begins.

Snow will come to an end during Tuesday morning.

All-in-all, this will be a significant, long-duration (36-40 hours in length) that will bring significant travel problems to Western and Central Mass throughout Sunday afternoon, Sunday night, Monday and Monday night. Widespread activity and school cancellations are expected.

If you have travel plans from Sunday afternoon through Sunday night, Monday and Monday night, you may want to think about either leaving earlier (Saturday, Saturday night or even first thing Sunday morning) or delaying your trip until later Tuesday, if you can.

You will find my latest forecast total snow amount map below. Be aware that these forecast amounts WILL probably change some more over the next day or so. There is the possibility that I may have to increase my forecast snow amounts some more, so stay tuned.

Keep checking back for updates on this upcoming significant winter storm.

Thank you for reading our latest forecast for Western and Central Mass.

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