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Boston weather: Sprinkles and showers around

Forecast discussion: After several days of bright sunshine, Boston began to see more clouds than sun on Thursday. We did see some sunshine through the morning and early afternoon, but the sun began to disappear behind the clouds by the late afternoon.

The extra cloud cover is due to a low pressure system that has been stuck over western New York the last couple of days. The strong high pressure system to our north is beginning to move into the Atlantic, and we are losing its influence. Now, the low can bring extra moisture into our atmosphere. For this evening, we will begin to see some drizzle and isolated showers. But, this will not be widespread and continuous. We may see a shower last five minutes, then end. Or, you may just see a mist. There really is not enough upper level dynamics to make a hard, widespread rainfall.

The low will meander along to the east Friday evening and into Saturday. So, we will continue to see isolated showers into early Saturday morning. However, I feel the shower activity will be offshore by Saturday morning. So, we will just keep cloudy skies and very cool temperatures. The cooler temperatures will be due to the northeast winds, coming off the cooler ocean waters.

As we head into early next week, school will be beginning in several communities in the Ocean State from Monday through Wednesday. But, high pressure will be controlling the weather. As the high moves south from Canada, it will begin to move offshore. Winds turning to the southwest will help warm temperatures back into the lower 80’s by Wednesday.

Finally, we will look into the tropics, where a cluster of thunderstorms have a good chance of becoming the next tropical system. The National Hurricane Center sent a Hurricane Hunter in this afternoon, but the center is still poorly defined. But, they did find a small area of tropical storm force winds on the northeast side of the low. The system may lose some strength passing over the mountainous area of Hispaniola on Saturday, before gaining strength passing near the Bahamas. There is a 60% chance the system will become a tropical system within 48 hours according to the 8 p.m. ET update.

72 hour forecast:

Tonight: Cloudy with drizzle and isolated showers. We will see a low of 62.
Friday: Mostly cloudy with isolated showers from time to time. We will see a high of 68 with east-northeast winds of 9-12 mph.
Fenway Park Forecast (7:10 p.m. vs. Seattle): Cloudy, isolated showers and drizzle, 64.
Friday night: Scattered showers and drizzle until midnight. We will see a low of 62 with northeast winds of 8-11 mph.
Saturday: Mostly cloudy skies with partial clearing by the early evening. We will see a high of 73.
Saturday night: Partly cloudy with a low of 58.
Sunday: Mostly sunny with a high of 73.
Sunday night: Clear skies with a low of 59.

Extended Forecast:
Monday: Mostly sunny with a little more humidity. Highs 76-79, lows 59-62.
Tuesday: Mostly sunny. Highs 79-82, lows 61-64.
Wednesday: Mostly sunny. Highs 81-84, lows 62-65.
Thursday: Partly sunny. Highs 78-81, lows 63-66.

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