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Boston weather: Showers/thunderstorms ahead

Forecast discussion: Well, Boston finally felt a little bit of that early August weather on Tuesday. Thanks to bright sunshine and high dewpoints, the temperature for the day reached a high of 82 degrees. It was the perfect day to head to the beaches, if you happened to have the day off. We will see one more day of warm, humid weather, before a cold front helps sweep the humidity away in time for the weekend.

A cold front now passing into central New York will bring some isolated showers and thunderstorms just after midnight into eastern Massachusetts. Also, we could see some patchy fog during the overnight, especially along the coastline. This front will slowly push through Southern New England, so there is a good chance to see some showers, periods of rain, and a thunderstorm across the region. The front will linger offshore on Thursday, so there is a very slight chance for a shower or thunderstorm to form by the afternoon.

By Thursday night, the cold front will move offshore, allowing for drier and slightly cooler air to move back over New England. A strong high pressure system will be in charge, and it will also be moving very slowly. It will remain around the Mid-Atlantic region, and becoming quasi-stationary. Once again, we will not be seeing any hot and hazy weather, but rather bright sunshine with temperatures reaching the upper 70’s to lower 80’s. There is a good chance we will see the sea breeze develop during the afternoon.

The weekend looks fine, and the start of next week will be about the same. The only difference will be Tuesday, when a little moisture begins to move northward. So, we will begin to see the sunshine become milky as some mid-level clouds begin to move into the area. There is the chance of seeing showers next Wednesday.

Meanwhile, Tropical Storm Bertha is centered at 36.2N 70.3W, or about 415 miles northwest of Bermuda. Maximum sustained winds are at 50 mph, and is moving to the north-northeast at 21 mph. The system will continue to track to the northeast, and move far away from the east coast. However, Southern New England will feel some effect from Bertha. The strong seas and swells it is creating will reach the south facing beaches early Thursday morning. Because of this, a special Rip Current Statement has been issued for the south facing beaches along southern Rhode Island, Nantucket, and Martha’s Vineyard. So, please be careful of moderate to high rip tides if you are heading to out to this area over the next few days.

72 hour forecast:

Tonight: Mostly cloudy with patchy to dense fog forming, especially along the coast. Showers and isolated thunderstorms will be arriving after midnight. It will remain humid with a low of 66.
Wednesday: Partly sunny with the chance for showers/thunderstorms, starting in the late morning. We will have a high of 81 with northwest winds of 7-10 mph.
Wednesday night: Showers/thunderstorms end during the early morning. We will see a low of 63. Winds will come from the northwest at 6-9 mph.
Thursday: Partly to mostly sunny with a widely isolated afternoon shower or thunderstorm. We will see a high of 79.
Thursday night: Partly cloudy with a low of 62.
Friday: Mostly sunny with a high of 80.
Friday night: Partly cloudy with a low of 62.

Extended Forecast:
Saturday: Mostly sunny. Highs 79-82, lows 60-63.
Sunday: Mostly sunny. Highs 81-84, lows 62-65.
Monday: Mostly sunny. Highs 81-84, lows 63-66.
Tuesday: Mostly sunny in the morning, with partly sunny skies through the afternoon. Highs 79-82, lows 64-67.