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Boston weather forecast for Jan. 18, 2014

The weather map for Southern New England at 1 p.m. EST on January 18, 2014.
The weather map for Southern New England at 1 p.m. EST on January 18, 2014.

Forecast discussion: An area of high pressure ridging gave Boston sunny skies for Friday, with temperatures reaching the middle 40’s. We will see one more day of milder weather, before we see a return of the polar vortex over New England next week.

High temperature forecast for January 18, 2014

An occluded front over western New York will bring some scattered showers during the overnight hours early Saturday morning. We will continue to see rain showers during the morning, with more scattered showers into the afternoon. Showers will end by the late afternoon, as the front moves offshore. A weak area of high pressure will bring partly cloudy skies for Saturday night.

An Alberta Clipper will bring a few snow showers during Sunday afternoon. The moisture will move offshore before midnight, with some drier air moving in for the holiday on Monday. We will see limited sunshine, but a weak high pressure system will keep any storm systems away from New England.

By Tuesday, high pressure ridging to our north will keep a developing low pressure system from bringing any significant snowfall to Boston. There is a slight chance of some ocean effect snow showers for Tuesday evening, lasting into the middle of Wednesday morning. However, the computer models are all starting to agree that this low will be too far offshore to bring any precipitation to the area. If the models stay consistent tomorrow night on their forecasts, I will be taking the snow showers out of the forecast.

The computer models do agree that we will be seeing some very cold air return to New England by Tuesday night. Although the air will not be as cold as the first polar vortex, temperatures will remain well below normal. Daytime highs will range from the upper teens to the middle 20’s. Overnight lows will start off in the upper single digits Tuesday night, before slowly rising to the middle teens by next Friday night.

72 hour forecast:

Tonight: increasing clouds with a passing rain shower by 4 a.m. and a low of 34.
Saturday: Rain showers through the morning, ending around 3 p.m. We will see a high of 43 with winds turning to the west-southwest at 12-15 mph in the afternoon.
Saturday night: Partly cloudy and colder with a low of 28. Winds will come from the west at 11-14 mph.
Sunday: Mostly cloudy with scattered snow showers in the afternoon and a high of 38.
Sunday night: Light snow ends by midnight with a low of 26 with partly cloudy skies by 3 a.m.
Martin Luther King Jr. Day: Partly sunny with a high of 36.
Monday night: Partly cloudy and colder with a low of 17.

Extended Forecast:
Tuesday: Increasing clouds during the mid-afternoon, with possible snow showers during the evening. Highs 22-25, lows 7-10.
Wednesday: Partly sunny. Highs 18-21, lows 7-10.
Thursday: Mostly cloudy with possible snow showers. Highs 19-22, lows 9-12.
Friday: Snow showers during the early morning, with partly to mostly sunny skies by the late morning. Highs 23-26, lows 13-16.

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