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Boston weather: Snow expected for Tuesday

The high temperatures for Southern New England on February 18, 2014.
The high temperatures for Southern New England on February 18, 2014.

Forecast discussion: Is it me, or has winter lasted longer than usual? It only feels that way. Consider this: the average amount of snow Boston receives up to this point in winter is 29.5 inches. As of yesterday, we have already measured 53.5 inches of snow. Yup, you are correct, we have received 2 feet of snow above the normal. Sadly, on Tuesday, we will be adding to the totals.

Tuesday's predicted snowfall totals in inches from 1 p.m. to 7 p.m. on 2/17/14

High pressure that brought us two sunny days will begin to move offshore. We will be seeing a low pressure system over Indiana bring increasing clouds after midnight. The morning commute for Tuesday looks cloudy, but dry. However, I am expecting light snow to begin falling over part of eastern Massachusetts by about 10 a.m. Due to this system a Winter Weather Advisory is in effect for Essex County from 7 a.m. Tuesday until 8 p.m. The snowfall will move into Boston before noon. The heaviest snow will occur into the early start of the evening commute. By 8 p.m., all the snow should end, as the low moves quickly out to sea. South of Boston will see about 1-3 inches, while the city itself gains 2-4 inches. The heavier amounts will be north and west of the city. This time, the Cape and Islands will remain mostly rain. To view a total snowfall map, click here.

A warm front behind the low will slowly move towards eastern Massachusetts on Wednesday. However, this front will actually help lift our daytime temperatures above 40 degrees. Also, any precipitation we will see on Wednesday afternoon will be rain only. However, we may wake up to some black ice on the roads Wednesday night and early Thursday morning, as temperatures fall below freezing. However, we will continue to see this thaw continue into Friday afternoon. We will see some heavy rain on Friday, as a cold front works its way through Southern New England.
Looking at the weekend, once the cold front passes through, we will return to some cooler temperatures. However, the newest computer models suggest dry weather for the weekend. Temperatures will also stay above freezing during the day, meaning more melting. But, the chance for some more snow returns by Monday night, as a low pressure system south of the area moves out to sea.

72 hour forecast:

Tonight: Increasing clouds after 3 a.m. and a low of 18.
Tuesday: Light snow by the end of the morning commute, with moderate to heavy snow through the afternoon. The south coast will see a mix or change to rain. We will see a high of 35 with southeast winds of 15-18 mph.
Tuesday night: Snow ends around 8 p.m. Snowfall amounts include 1-3 inches south of Boston, with 3-5 inches north of Boston. Plymouth County will see a coating to 2 inches, with the Cape and Islands remaining as rain. Mostly cloudy with a low of 28 with winds shifting to the west-northwest at 8-11 mph.
Wednesday: Cloudy with showers arriving by noon and might mix with snow after the evening commute. We will see a high of 43.
Wednesday night: Precipitation ends by 10 p.m. with clearing skies and a low of 30.
Thursday: Mostly sunny with a high of 46.
Thursday night: Mostly cloudy with a low of 35.

Extended Forecast:
Friday: Cloudy with showers/light rain around 2 a.m. and ending by the evening. Highs 49-52, lows 32-35.
Saturday: Partly to mostly sunny and cooler. Highs 43-46, lows 28-31.
Sunday: Mostly sunny. Highs 39-42, lows 25-28.
Monday: Cloudy with possible light snow. Highs 35-38, lows 24-27.

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