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Boston weather: Sun in the morning, rain by the evening

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Forecast discussion: High pressure well off the east coast brought a strong ridge over eastern Massachusetts on Sunday. The high helped us receive bright sunshine, and the humidity was quite low. We reached a high of 84 degrees, according to Logan Airport in Boston. However as we move into the week, we will see more unsettled weather, and a possible weekend streak come to an end.

A warm front passing into the Great Lakes will reach New England by late Monday night. The change to southwest winds tomorrow will help increase our dewpoint temperatures. This in point will increase the humidity back into the air by tomorrow night. The warm front may help trigger an isolated shower or thunderstorm.

The warm front will remain to our north and east on Tuesday, helping to bring higher humidity into the area for Tuesday and into Wednesday. We may see high temperatures reach 90 degrees on Tuesday, and into the upper 80’s by Wednesday. Right now, the best risk for strong thunderstorms will be Wednesday, as the cold front inches closer to New England.

The cold front is expected to move offshore by Thursday morning. Right now, the American model is moving the front faster than the European model. So, the timing of the precipitation coming to an end may change over the next couple of days. High pressure will bring mostly sunny skies and cooler temperatures for Friday and Saturday.

After looking over the current models, it appears that our streak of five consecutive weekends of dry weather will come to an end next week. A cold front will be passing into New England next Sunday, helping to create some scattered showers and thunderstorms by the morning.

72 hour forecast:

Tonight: Clear skies and humid with a low of 68.
Monday: Mostly sunny in the morning with increasing afternoon clouds. A scattered shower or thunderstorm is possible by the evening commute. It will become windy with a high of 89. Winds will come from the south-southwest at 13-18 mph.
Fenway Park Forecast (7:10 p.m. vs. Chicago White Sox): Windy, cloudy, possible shower/thunderstorm, 83.
Monday night: Cloudy with isolated showers and thunderstorms. We will see a low of 71 with south-southwest winds of 11-14 mph.
Tuesday: Partly sunny skies with scattered showers/thunderstorms by the evening commute. We will see a high of 90.
Tuesday night: Scattered showers and thunderstorms with a low of 73.
Wednesday: Scattered showers and thunderstorms. Some thunderstorms may be strong. We will see a high of 89.
Wednesday night: Scattered showers and thunderstorms with a low of 69.

Extended Forecast:
Thursday: Showers/thunderstorms end by 6 a.m. with partly sunny skies. Highs 84-87, lows 64-67.
Friday: Mostly sunny. Highs 80-83, lows 63-66.
Saturday: Partly to mostly sunny. Highs 81-84, lows 65-68.
Sunday: Showers/thunderstorms. Highs 81-84, lows 64-67.

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