Forecast discussion: After temperatures reached the upper 70’s in Boston Sunday afternoon, a dry cold front passed through the state. This created strong northwest winds, and temperatures are falling. We will feel autumn like temperatures over the next few days, before a hint of summer returns by midweek.
Northwest winds reached as much as 22 mph Sunday afternoon, and cooler air from Canada is moving over the region. Our low temperatures will fall to near 50 degrees, with high temperatures trying to reach 70 degrees by Monday afternoon. More moisture will move over New England starting Tuesday night, as a low pressure system makes its way into the region. With higher dewpoints, our temperatures will increase. Overnight lows on Wednesday will only fall to the upper 60’s to lower 70’s, as a warm front moves over New England.
However, this front will also bring some showers and possible thunderstorms Wednesday evening. The precipitation will continue into Thursday, before the front moves offshore Friday morning. We will see autumn like weather next weekend, as high temperatures only reach the upper 60’s to lower 70’s. Overnight lows will fall into the upper 40’s to lower 50’s.
Meanwhile, Tropical Depression Nine has formed off the west coast of Africa. As of 8:00 p.m. EDT, Nine was centered at 13.1N 21.4W, or about 190 miles southeast of the Cape Verde Islands. The system will reach tropical storm strength within the next 12 hours, and then reach hurricane strength within 72 hours, reaching winds of 80 mph. The track has the system moving in a northwest track after 48 hours. After Nine passes the Cape Verde Islands, it will not be around any islands or land for the next five days.
72 hour forecast:
Tonight: Clear skies and cool with a low of 50.
Monday: Mostly sunny with a high of 70. Winds will shift to the south-southwest at 9-12 mph in the afternoon.
Monday night: Partly cloudy with a low of 58. Winds will come from the south-southwest at 7-10 mph.
Tuesday: Partly sunny and warmer with a high of 80.
Tuesday night: Mostly cloudy with possible showers after midnight and a low of 70. Patchy fog may develop along the coast.
Wednesday: Morning sunshine, with skies becoming cloudy by the late afternoon. We will see a high of 88.
Wednesday night: Showers, isolated periods of rain, and a possible thunderstorm with a low of 71.
Thursday: Showers/thunderstorms. Highs 82-85, lows 62-65.
Friday: Showers/rain ending by the late morning. Partly to mostly sunny skies expected through the afternoon. Highs 70-73, 51-54.
Saturday: Mostly sunny. Highs 66-69, lows 46-49.
Sunday: Mostly sunny. Highs 68-71, lows 49-52.