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Boston weather: Slow warming trend ahead

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Forecast discussion: After some cloudy skies during the early morning on Saturday, we woke up to some sunshine and mid-level clouds. However, as the day warmed up, this helped to heat the atmosphere, and create cloudy conditions by 11 a.m., according to weather observations from Logan Airport. But, the sun returned by the mid-afternoon, making for a nice sunset.

A strong high pressure system will come down from Quebec, Canada and keep a strong ridge over New England for the next several days. Temperatures will be slowly warming into the lower 80’s by Tuesday, as winds turn to the southwest. A weak cold front may bring some scattered showers late Wednesday night. A new high pressure system will bring clearing skies by Thursday afternoon. Cooler air behind the front will return us to seasonable temperatures by the end of the week. We will see increasing clouds by Saturday afternoon, in anticipation of a new cold front bringing some showers for next Sunday.

Meanwhile, the National Hurricane Center has finally started advisories on Tropical Depression Four. The first advisory for the system came out as of 5 p.m. EDT. As of 8 p.m. EDT, Four was centered at 22.0N 72.4W, or about 80 miles northeast of Great Inagua Island. Maximum sustained winds are at 35 mph, and is moving northwest at 11 mph.

Watches and Warnings are in effect for many islands in the central Bahamas. The forecast calls for the system to become a hurricane by Tuesday afternoon. The current tracks actually take the system towards the east coast. Four will eventually turn to the north and northeast by Wednesday afternoon. However, several hurricane models move the system into the Carolinas and make landfall by early next week. Also, we may see some showers and rainfall should the tropical remain moving north into the Mid-Atlantic. I will continue to monitor the system and provide you with a new update tomorrow night.

72 hour forecast:

Tonight: Partly cloudy with a low of 59.
Sunday: Mostly sunny with a high of 78. Winds will come from the east-northeast at 9-12 mph.
Fenway Park Forecast (1:35 p.m. vs. Seattle): Mostly sunny, 74.
Sunday night: Clear skies with a low of 61. Winds will turn to the west-southwest at 5-8 mph.
Monday: Mostly sunny with the humidity slowly rising. We will see a high of 83.
Monday night: Partly cloudy with a low of 64.
Tuesday: Mostly sunny with a high of 84.
Tuesday night: Partly cloudy with a low of 64.

Extended Forecast:
Wednesday: Mostly sunny through the afternoon, with increasing clouds and a chance for scattered showers by the evening. Highs 83-86, lows 65-68.
Thursday: Scattered showers end by the late morning, with partly sunny skies during the afternoon. Highs 80-83, lows 62-65.
Friday: Mostly sunny. Highs 76-79, lows 59-62.
Saturday: Mostly sunny with increasing clouds by mid-afternoon. Highs 75-78, lows 61-64.

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