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Boston weather: Delightful break from winter Thursday

Friday will feature rain locally as strong low pressure moves into Canada.
Friday will feature rain locally as strong low pressure moves into Canada.

Metro Boston, North Shore and Metro West: A burst of moderate to heavy snow developed very quickly during the mid afternoon on Wednesday. However, a sneak snowstorm was not in the cards, not locally anyway. The snow quickly began to transition to rain here on the coast and moved inland and northward during the late afternoon. Although some locations saw a quick one or two inches of snow accumulate the precipitation changed to rain and ended before midnight. That now makes 8 days out of the first 19 of this month that most areas throughout the metro Boston area have seen measurable snow.

Sandwiched between two systems on Thursday but we squeeze out a really nice day before more precipitation arrives tonight.

It has been talked about since last weekend and that is a warm up toward the end of this week. That is still in the cards and will begin Thursday through Friday and into the weekend. As we mentioned yesterday this will come with somewhat of a price with showers and periods of rain Thursday night into Friday, although a wintry mess could develop later tonight across the far interior before the milder air arrives Friday morning.

Thursday is going to be the pick of the week as we can expect a mainly sunny day with those milder temperatures. Expect the mercury to climb into the 40s. Thereafter, the weather conditions begin to deteriorate Thursday night into Friday. With low pressure moving well to our northwest into southern Canada we get into a mild southerly flow as a warm front approaches from our south. Then, as the low moves into Quebec it drags a cold front through here Friday night. With that said expect periods of showers and or steady rain Thursday night and Friday, followed by another dry period Saturday. Some showers may contain heavy bursts of rain and strong gusty winds Friday afternoon. The one complicating factor is across the interior, mainly along and west of Route 495, where a period of icing may develop later tonight into Friday morning as temperatures may just be cold enough to support this. Along the coastal plain we should remain just above freezing through the night.

As of Thursday morning the National Weather Service has issued a Winter Weather Advisory for northern Middlesex County in our forecast area and westward into central and western Massachusetts. This advisory is in effect until 10 am Friday.

With the snow pack and clogged storm drains expect quite a bit of standing water and some flooding of the secondary roads through Friday. Also, areas of fog are likely Thursday night and Friday.

The weekend should feature dry and mild conditions. The air behind the departing cold front is not all that cold and we can expect to remain mild through Saturday then cooling back some on Sunday. Winter is not done with us yet. It will gradually get colder the beginning of next week with the potential for storminess around mid week.

72 Hour Outlook:

Thursday: Mostly sunny, increasing afternoon clouds. Mild, high temperatures in the mid to upper 40s. Southwest winds 5 to 15 mph.

Thursday night: Rain developing, possibly becoming freezing rain and sleet far interior. Areas of fog. Cool, lows in the low 30s inland to mid 30s coast. Light southeast winds.

Friday: Mixed freezing rain and rain interior early, otherwise periods of showers. Some heavy downpours possible in the afternoon. Areas of fog. Mild, highs in the mid to upper 40s inland, possibly low 50s coastal plain. Southeast to south and southwest winds 5 to 10 mph, becoming gusty in the afternoon.

Friday night: Chance of early showers, otherwise partly cloudy and breezy. Patchy fog. Lows in the low 30s. Southwest to west winds gusting to 20 or 25 mph.

Saturday and Saturday night: Partly cloudy. Highs in the 40s. Lows in the upper 20s to low 30s.

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