Forecast discussion: A frontal boundary over southern New Hampshire helped create some thunderstorms this morning, and parts of eastern Massachusetts received some passing showers and thunderstorms Sunday morning. As of writing this report, the radar was quiet over Boston. Unfortunately, the weather pattern will not change over the next couple of days.
That frontal boundary has a low pressure center attached to it, and is currently over eastern Maine. The boundary will slowly move northward by Monday morning, but the boundary will still help create isolated showers and thunderstorms this evening and into Monday. Some areas may see pockets of heavy rainfall, so minor street flooding is possible. The chances for more rainfall will continue into Tuesday, as a cold front is expected to pass through the region during the afternoon. The cold front will move offshore late Tuesday night, allowing for some partial clearing early Wednesday morning.
A strong high pressure system now over central Canada will move over the Northeast U.S. during Thursday and Friday. The high will also bring some cooler air for the weekend, as our high temperatures fall into the upper 60’s to middle 70’s. Overnight lows will be cool as well, with temperatures falling into the lower to middle 50’s. There is the slight chance for a passing shower Thursday afternoon, as a cold front with little moisture passes through Southern New England. At this time, I believe the chance is quite low.
The high will give us nice weather for Friday, with a few more clouds in the sky by Saturday afternoon. This is due to a cold front coming down from Canada into New England on Sunday. We will see increasing clouds throughout the afternoon, with the chance for some showers by Sunday night. At this time, the American model keeps the front relatively dry. The European model brings showers into the area by the morning. For now, I will stay with the evening hours, as the European model has been inconsistent with its forecast the last few model runs.
72 hour forecast:
Tonight: Overcast with isolated showers and a possible thunderstorm. Patchy fog will develop after 11 p.m. We will see a low of 70.
Labor Day: Overcast with scattered showers and thunderstorms through the day. We will see a high of 79 with south-southeast winds of 8-11 mph.
Fenway Park Forecast (1:35 p.m. vs. Detroit Tigers): Showers and isolated thunderstorms possible, 76.
Monday night: Scattered showers, periods of rain, and thunderstorms with patchy fog and a low of 68. Winds will come from the southwest at 5-8 mph.
Tuesday: Showers and isolated thunderstorms with isolated pockets of rain through the day and a high of 79.
Tuesday night: Showers ending around 2 a.m. with clearing skies and a low of 63.
Wednesday: Mostly sunny with the high reaching 79.
Wednesday night: Partly cloudy with a low of 63.
Thursday: Mostly sunny in the morning before becoming partly sunny in the afternoon with a late afternoon shower possible. Highs 76-79, lows 52-55.
Friday: Mostly sunny. Highs 69-72, lows 54-57.
Saturday: Mostly sunny. Highs 74-77, lows 60-63.
Sunday: Sunny in the morning, with cloudy skies by the afternoon and possible evening showers. Highs 75-78, lows 58-61.