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Boston weather: Extremely mild Monday, but much cooler on Tuesday

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Forecast discussion: I hope all their moms enjoyed the brilliant sunshine and the 80 degree high temperature Boston received on Sunday. It is a little tough to put into a neat little package. However, you may want to bottle this weather for a future time. The weather pattern will become a little unsettled through the rest of the week.

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Right now, a high pressure system over the Mid-Atlantic is controlling the weather. This high will slowly move to the south, as we await a cold front moving south from Quebec, Canada. We will still see temperatures near 80 degrees for high temperatures on Monday, but the front will quickly change that by Monday night. This “back door” cold front will not change our temperatures too much late Monday night, but the change will be felt on Tuesday. Temperatures will drop over 20 degrees as the high temperature on Tuesday barely reaches 60 degrees. Also, the front will help create a few showers early Wednesday morning.

As we move into Wednesday evening, a strong cold front forming in the north central U.S. will begin to trek towards the east. This front will help create scattered showers for Thursday. According to the American model, a low pressure center will form over the Delmarva Peninsula Thursday night, and move into the Mid-Atlantic for Friday. This low will help bring moisture from the Atlantic, and the front will extend south into the Gulf of Mexico. Getting two significant bodies of water to feed the low, we will have the opportunity to see heavy rain and scattered thunderstorms into Saturday morning.

The low will slowly be pushed out to sea, and precipitation will taper off to showers by Saturday afternoon. Eventually, the rainfall will end by early Saturday evening. A weak ridge of high pressure will give us limited sunshine for next Sunday, with the chance for more showers by the evening. Temperatures will rebound after Tuesday’s below seasonable conditions. But, temperatures will fall to the lower 60’s for high temperatures by next Sunday.

72 hour forecast:

Tonight: Partly cloudy with a low of 57.
Monday: Mostly sunny in the morning with increasing clouds in the afternoon. We will have a high of 81 with southwest winds of 14-17 mph.
Monday night: Cloudy with isolated showers just before midnight. We will see a low of 54 with winds shifting to the north-northeast at 7-10 mph.
Tuesday: Partly sunny and cooler with a high of 57.
Tuesday night: Mostly cloudy with isolated showers by 4 a.m. and a low of 47.
Wednesday: Overcast with scattered showers by the morning commute. We will see a high of 60.
Wednesday night: Scattered showers with a low of 54.

Extended Forecast:
Thursday: Scattered showers. Highs 69-72, lows 58-61.
Friday: Mostly cloudy with moderate to heavy rain and scattered thunderstorms. Highs 67-70, lows 54-57.
Saturday: Heavy rain and thunderstorms in the morning, tapering to showers in the afternoon, before ending in the early evening. Highs 67-70, lows 50-53.
Sunday: Partly sunny with evening showers. Highs 62-65, lows 52-55.

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