Forecast discussion: After a decent day of clouds and sunshine on Friday, Boston will be seeing gray as we enter the long, holiday weekend. A series of fronts will be passing through the region, giving us muggy, humid conditions and the threat of precipitation almost every day.
For this evening, any clear skies will be taken away by high to mid-level clouds. Also, with the dewpoint rising, patchy fog will form, especially along the coastline, Cape, and Islands. This will be due to a cold front over eastern Canada. This front will remain north of us, but it may help bring an isolated shower or thunderstorm to us during the afternoon. A warm front moving into the Ohio River Valley will stay to our west on Sunday, but it will help enhance the atmosphere to create showers and possible thunderstorms. The activity will be off and on, so there will be dry periods on Sunday. However, you may want to keep one eye on the sky if you are having that last cookout or barbecue.
At this time, all the computer models agree that Labor Day will actually be the wettest day of the long weekend. A cold front will be approaching the region, which will meet with the warmer, muggy air. This will help create scattered showers with isolated thunderstorms and periods of heavy rainfall. The activity will persist into Monday evening, with widespread showers slowly ending by the evening commute Tuesday night.
High pressure will give us a nice day on Wednesday, but a weak disturbance behind the high will bring back cloudy skies and possible showers for Thursday. A high pressure system out of eastern Canada will help clear skies as we enter the following weekend. Temperatures will slowly cool into the lower to middle 70’s for highs by next Friday, with lows in the upper 50’s.
72 hour forecast:
Tonight: Overcast skies after midnight with patchy fog developing around 4 a.m., especially along the coastline. It will be muggy with a possible shower by 4 a.m. We will see a low of 69.
Saturday: Peeks of sunshine through overcast skies, with isolated showers and thunderstorms by the mid-afternoon, especially in the northern and central part of the state. We will see a high of 84 with southwest winds of 10-13 mph.
Fenway Park Forecast (7:10 p.m. vs. Chicago White Sox): Isolated showers and possible thunderstorm, 77.
Saturday night: Overcast with widely isolated showers and thunderstorms. Patchy to dense fog will form before midnight. We will see a low of 71 with winds from the southwest at 9-12 mph.
Sunday: Overcast with scattered showers and an isolated thunderstorm. We will see a high of 81.
Sunday night: Isolated to scattered showers with a thunderstorm possible and a low of 70.
Labor Day: Overcast with scattered showers and isolated thunderstorms through the day, starting in the late morning. We will see a high of 79.
Monday night: Scattered showers, periods of rain, and thunderstorms with patchy fog and a low of 69.
Tuesday: Showers through the day, ending in the late evening. Highs 79-82, lows 63-66.
Wednesday: Mostly sunny. Highs 77-80, lows 62-65.
Thursday: Mostly cloudy with possible showers by the evening commute. Highs 76-79, lows 55-58.
Friday: Mostly sunny. Highs 73-76, lows 57-60.