Forecast discussion: Since Sunday, Boston has been seeing the same pattern over the last few days. A low pressure system off the coast of Maine brings mostly cloudy skies with scattered showers by the afternoon. But, during the morning, high pressure controlling the eastern U.S. gives us bright sunshine through the morning. The pattern will repeat itself once again.
Despite northeast winds, temperatures will still reach 70 degrees. We will see sunny skies through the morning hours. But, by the afternoon, the low will bring clouds down into Southern New England, and help create some isolated showers by the middle of the afternoon. Once the sun goes down for the night, we will lose the daytime heating, and the clouds will once again dissipate.
As we head into Wednesday, the low will move offshore, but only to be replaced with a low coming from the Great Lakes. The low will become stationary over eastern New York by late Wednesday afternoon. We will begin to see scattered showers by the middle of the evening commute, before a second low following along the cold front brings heavier rain for Wednesday night into Thursday morning. Once the low moves out to sea, the first low will then slowly push east. The low will bring isolated showers on Friday.
You will also notice that an upper level low just offshore will bring down some very cold air for this time of the year. High temperatures on Thursday will only make it to the upper 50’s. Temperatures may reach 60 degrees on Friday. The surface low will finally move out to sea by Saturday morning. But, some leftover moisture over the region could help produce a couple of scattered showers through the day.
By the time we reach early next week, the weather will improve for the rest of the holiday weekend. Temperatures will rise into the lower 70’s on Sunday under mostly sunny skies, with temperatures reaching the middle 70’s on Monday.
72 hour forecast:
Tonight: Partly to mostly cloudy with an isolated shower. We will see a low of 51.
Tuesday: Partly sunny through the morning, with some isolated showers by the mid-afternoon. We will see a high of 70 with north-northeast winds of 10-13 mph.
Fenway Park Forecast (7:10 p.m. vs. Toronto): Mostly cloudy with passing showers, 63.
Tuesday night: Partly to mostly cloudy with a low of 53. Winds will come from the northeast at 3-6 mph.
Wednesday: Partly sunny with showers arriving by 6 p.m. We will have a high of 69.
Wednesday night: Light to moderate rain with a low of 55.
Thursday: Moderate to heavy rain and an isolated thunderstorm during the morning, with showers by the afternoon. It will be cooler, with the high only reaching 58.
Thursday night: Showers and light rain with patchy fog developing. We will see a low of 52.
Friday: Isolated showers through the day. Highs 59-62, lows 49-52.
Saturday: Showers end by the early morning, with partly sunny skies. There is the chance for some scattered showers by mid-afternoon. Highs 64-67, lows 51-54.
Sunday: Showers end by midnight, with mostly sunny skies. Highs 69-72, lows 54-57.
Memorial Day: Mostly sunny and warmer. Highs 74-77, lows 54-57.