Forecast discussion: Over the next few days, summer is going to go away, as we begin to feel autumn a little early in Boston. However, by the weekend, we will return to seasonable temperatures.
A cold front brought some showers through eastern Massachusetts Thursday morning. Now, that front has moved offshore, with high pressure over Michigan now controlling our weather. However, this high is going to bring some cooler air from Canada. We will feel this cooler air tonight, as temperatures fall to near 50 in the capital city, and in the lower 50’s along the coast. Despite bright sunshine on Friday, temperatures will struggle to reach 70 degrees.
By Saturday, some warmer air will return to New England, and temperatures will return to the upper 70’s. A cold front coming down from Canada will help create cloudy skies with passing showers, especially in the morning and early afternoon. However, any precipitation will end by the late afternoon.
Cooler air will return again Sunday night, as temperatures will be in the lower 50’s during the evening, with high temperatures in the lower 70’s Monday. However, summer will try to take over once again by Wednesday, as temperatures climb back into the upper 70’s to lower 80’s. I’m expecting a strong cold front to bring some heavier precipitation Wednesday night into Thursday.
Meanwhile, the Atlantic is getting a little busier in terms of tropical development. However, the latest names tropical system is dying. Tropical Depression Gabrielle, formerly known as Seven, reached tropical storm strength earlier Thursday morning, but is weakening. As of 5 p.m. EDT, Gabrielle was centered at 18.2N 68.6W, or about 30 miles south-southwest of Punta Cana, Dominican Republic. Maximum sustained winds were at 30 mph, and was moving northwest at 9 mph. The forecast is for the system to become a remnant low within 24 hours, as Gabrielle is hitting westerly shear and a drier air mass. Right now, the computer models suggest a new tropical forming south or southwest of Bermuda in the next 2-4 days. However, no one is sure if it is Gabrielle re-forming, or if it is another low pressure center strengthening into a new tropical system.
Also, in the western Gulf of Mexico, a broad low pressure center about 150 miles east of Tampico, Mexico, did not have a well-defined circulation. But, it is possible it could become a tropical system before moving inland along the Mexican coast on Friday.
72 hour forecast:
Tonight: Clear skies and much cooler with the temperature falling to 49.
Friday: Mostly sunny with a high of 69. Winds will shift to the southeast at 5-8 mph.
Friday night: Partly cloudy with a low of 53. Winds will come from the south-southwest at 5-8 mph.
Saturday: Mostly sunny with increasing clouds near midnight. We will see a high of 78.
Saturday night: Mostly cloudy with showers developing after 3 a.m. and a low of 61.
Sunday: Mostly cloudy with passing showers starting in the morning, before ending in the late afternoon. We will see a high of 77.
Sunday night: Partly cloudy with a low of 50.
Monday: Mostly sunny. Highs 69-72, lows 51-54.
Tuesday: Mostly sunny. Highs 74-77, lows 60-63.
Wednesday: Becoming overcast by mid-afternoon, with showers developing in the late evening. Highs 78-81, lows 63-66.
Thursday: Showers/rain and a possible thunderstorm. Highs 77-80, lows 64-67.