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Boston weather: Partly sunny, calmer winds for Friday

The weather map for Southern New England at 2 p.m. EDT on April 25, 2014. Partly sunny skies and lighter winds are expected.
The weather map for Southern New England at 2 p.m. EDT on April 25, 2014. Partly sunny skies and lighter winds are expected.

Forecast discussion: Boston received what looked to be a gorgeous spring day, with bright sunshine. However, it might have been a nicer day if we did not have so much wind. The strong winds are due to a high pressure ridge building into New England. But, the low pressure system that brought showers and thunderstorms on Wednesday is only over the Canadian Maritimes. The clash of the two pressure systems helped create a tight pressure gradient, which then created the strong winds. Logan Airport received gusts as high as 44 mph at 2 p.m. A Wind Advisory was put in effect until 7 p.m.

High temperature forecast for April 25, 2014

However, the low continues to make its way east, allowing winds to diminish through the overnight. However, with clear skies expected tonight, there is a Frost Advisory in effect for southern Bristol and southern Washington Counties from 3 a.m. to 7 a.m. The reason for the advisory is due to the start of the growing season in the area. Temperatures may fall to near freezing near the coast, so please bring in potted plants, and cover any vegetation that remains outside.

We will see partly sunny skies for Friday, as a low pressure system makes its way out of eastern Missouri. However, we will have two low pressure systems within the same storm system, creating the storm to rotate near Southern New England Friday night into early Saturday morning. We will see showers early Saturday morning, with the second low staying over Northern New England. This will allow for scattered showers and light rain through the day. The system will move offshore Sunday morning, with partly sunny skies by noon.

A low of cold air will come down from Canada after Monday afternoon, thanks to a strong upper level low which will remain over the Northeast U.S. Despite late April sunshine, high temperatures will only reach the upper 40’s to lower 50’s for next week. A new low pressure system will slowly move over the Northeast by early Wednesday morning, and we will see showers and light rain throughout Wednesday. Right now, the long range computer models suggest showers will remain overhead for all of next Thursday. However, the European model suggests the precipitation will be lighter and will end before the end of the day. For now, my confidence in the forecast after Wednesday afternoon is low. The American model is suggesting this low will remain stationary, and continue to give us rainfall into the weekend.

72 hour forecast:

Tonight: Clear skies with winds diminishing and a low of 40.
Friday: Sunny through the morning, but partly sunny by the late afternoon. We will see a high of 59 with winds shifting to the south-southeast at 10-13 mph by the afternoon.
Friday night: Cloudy with scattered showers by midnight and a low of 44. Winds will come from the southeast at 7-10 mph.
Saturday: Showers with intermittent rain and a high of 48.
Saturday night: Cloudy with isolated showers and a low of 41.
Sunday: Isolated showers by 7 a.m. with partly sunny skies by the late morning. We will see a high of 52.
Sunday night: Partly cloudy with a low of 43.

Extended Forecast:
Monday: Mostly sunny. Highs 53-56, lows 43-46.
Tuesday: Mostly sunny. Highs 51-54, lows 41-44.
Wednesday: Increasing clouds during the overnight, with showers/light rain by mid-morning. Highs 48-51, lows 42-45.
Thursday: Showers throughout the day. Highs 50-53, lows 44-47.

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