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Boston weather: Summer time is here, but quickly leaves

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Forecast discussion: For the longest time, I have been asked by several people when the warm weather was going to come to Boston. Although the high temperature reached 83 degrees at Logan Airport, the dewpoint temperature reached the upper 60’s. This high humidity will remain around New England for the next couple of days, as well as the chance at seeing some showers and thunderstorms.

At this time, a warm front pushing through the eastern Great Lakes will bring the chance for an isolated shower or thunderstorm this evening. But, the precipitation will be short lived, as the precipitation shield will move offshore by the end of the morning commute. A cold front associated with the same system will not arrive until tomorrow night, so I am expecting some sunshine and very warm temperatures through the day. Some inland areas may reach 90 degrees. With the humidity, the heat index will make it feel like the lower 90’s. We may see a passing shower or thunderstorm tomorrow night. Some thunderstorms may create heavy periods of rainfall.

By Thursday morning, the cold front will be offshore, and cooler air from Canada will begin to move into New England. I am expecting high temperatures to reach the lower 80’s on Thursday, and into the middle 70’s on Friday. At this time, there are no significant weather features around New England, except for a weak high pressure ridge. However, temperatures will be cool, as daytime highs only reach the lower to middle 70’s.

As we head into next week, the computer models are very unsure about the next weather system. At this time, the American model brings a weak cold front from the north down through Rhode Island. The model feels we will see some isolated showers by the evening commute. However, the European model feels the front will move faster, giving us isolated showers by Monday morning. At this time, I am not sure which model is correct. So, I will split the difference and call for isolated showers in the afternoon. As we head into next Tuesday, a low pressure system over the Tennessee River Valley may bring some showers and thunderstorms to our area by Tuesday night. High temperatures will only reach the seasonable level, as they approach the middle 70’s.

72 hour forecast:

Tonight: Mostly cloudy with scattered showers and thunderstorms after midnight. It will be humid with patchy fog and a low of 69.
Wednesday: Showers/thunderstorms end by 8 a.m. Partly sunny skies expected with the slight chance for isolated afternoon showers and thunderstorms. It will be extremely warm with a high of 87. Winds will come from the northwest at 11-14 mph.
Fenway Park Forecast (1:35 p.m. vs. Minnesota): Partly sunny, humid, chance for an isolated shower or thunderstorm, 84.
Wednesday night: An isolated shower or thunderstorm before 2 a.m. Clearing skies expected for the rest of the overnight hours. We will only have a low of 66 with northwest winds at 5-8 mph.
Thursday: Mostly sunny skies with a high of 82.
Thursday night: Partly cloudy with a low of 60.
Friday: Mostly sunny with a high of 76.
Friday night: Partly to mostly cloudy with a low of 59.

Extended Forecast:
Saturday: Partly sunny. Highs 71-74, lows 57-60.
Sunday: Mostly sunny. Highs 72-75, lows 60-63.
Monday: Cloudy with isolated showers by the mid-afternoon. Highs 71-74, lows 60-63.
Tuesday: Partly sunny with the chance for evening showers/thunderstorms. Highs 74-77, lows 62-65.

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