The cold front that pushed through the local area Monday will slow and stall south of New England. The door has been opened for cooler air to overspread southern New England as we begin a cooling trend that will be here all week. A couple of waves of low pressure will ripple along the frontal boundary to our south, while high pressure builds to our north.
The first wave of low pressure may bring precipitation as far north as Cape Cod and the islands Tuesday. The second wave should bring its precipitation shield further north into the metro Springfield area and northward into southern Vermont and New Hampshire, with a very messy morning commute possible Wednesday morning. What initially looked to be a miss to our south is now becoming an event with accumulating snow likely. As of now it appears 2 to 4 inches of snow can be expected. However, this has become a tricky forecast and those amounts will probably need adjustment early Tuesday. We will keep a close watch on additional computer model runs tonight and update the snow totals, if warranted, Tuesday morning.
The next weather feature will be a strong cold front that approaches Thursday. It should be offshore by evening and could set off a snow flurry or snow shower in the afternoon or evening hours. More importantly, colder air arrives setting up Friday to be the coldest day of this week. With high pressure in place behind the front we should remain generally fair and dry into Saturday, although another cold front may bring a flurry or two at some point over the weekend.
Much has been made of the very cold air in Canada. We only get a glancing blow from this air mass late in the week, although there are some signs another southward push of the arctic air could bring much colder temperatures early next week.
Five Day Forecast:
Tuesday: Partly cloudy and much cooler. High temperatures near 40 degrees. Northwest to north winds about 5 mph.
Tuesday night: Becoming overcast. Chance of snow showers or light snow after midnight. Lows about 25. Winds near calm.
Wednesday: Snow is likely, possibly mixing with a bit of rain or sleet. Precipitation ends later in the day. Cold, highs around 35. Light winds.
Wednesday night: Decreasing clouds and cold. Lows 20 to 25. Winds turn west and gust to about 20 mph.
Thursday and Thursday night: Partly cloudy and cold. Chance of a flurry or snow shower late in the day or evening. Highs around 35. Overnight lows 16 to 22.
Friday and Friday night: Partly cloudy and colder. Highs near 30. Lows 14 to 20.
Saturday and Saturday night: Fair skies and seasonably cold. Highs around 35. Lows 20 to 25.