Forecast discussion: In Boston, the air definitely changed on Wednesday. A high pressure system helped bring cooler, drier air into the capital city during the early morning. The drier air did bring temperatures down today, as the high in Boston was only 83. The next few nights will be perfect for sleeping, and we can shut the fans and air conditioners off for the next few nights.
However, we will still experience above normal temperatures during the day, making it a little warm for our students returning to schools without air conditioning and for those who work outside. Things will begin to feel muggy again by Friday, as winds from the southwest help to push moisture from the Gulf back into New England. The dewpoint temperatures will return to oppressive conditions on Friday. We will also see increasing clouds by the late afternoon, as a cold front approaches Southern New England.
At this time, it appears we will see scattered showers and thunderstorms on Saturday, starting a few hours before dawn. The precipitation will be off and on throughout the day, so I would not call it a washout. Despite partly sunny skies, temperatures will still try to reach the middle 80’s. The computer models are beginning to agree that a new high pressure system will help push the cold front out into the Atlantic before the Patriots start the 2014 football season in Miami.
By Sunday, we will also see an end to the high temperatures reaching the 80’s. Colder air coming down from Canada will help keep our temperatures in the lower to middle 70’s into the middle of next week. The high will bring bright sunshine right into Tuesday. By Wednesday, a developing low over southwest Iowa Tuesday night will push east. It will try to bring some extra moisture along with it. There is the threat of seeing some showers by the end of the evening commute. It could become wet next Thursday, as a frontal boundary brings the chance for some heavy rainfall into part of next Friday.
72 hour forecast:
Tonight: Clear skies and not as humid with a low of 65.
Thursday: Mostly sunny and remaining very warm with a high of 86. Winds will come from the south-southwest at 10-13 mph.
Thursday night: Partly cloudy with a low of 67. Winds will come from the west-southwest at 8-11 mph.
Friday: Mostly sunny with increasing clouds by the evening. We will see a high of 87.
Friday night: Mostly cloudy with showers arriving by 4 a.m. We will see a low of 71.
Saturday: Scattered showers/thunderstorms off and on through the day. We will see a high of 85.
Saturday night: Showers/rain during the overnight with a low of 64.
Sunday: Rain tapering to showers before ending by 11 a.m. Partly sunny skies expected the rest of the day. Highs 71-74, lows 57-60.
Monday: Mostly sunny. Highs 73-76, lows 56-59.
Tuesday: Mostly sunny. Highs 72-75, lows 57-60.
Wednesday: Partly sunny with possible evening showers. Highs 73-76, lows 59-62.