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Boston Weather: 38.0°F | Light Rain

Weather: A Cold Shower

By Robert Korty
STAFF METEOROLOGIST -- During autumn synoptic weather maps often feature strong fronts pushing southward through the middle latitudes. Today is no exception, as a front lies across the Ohio River Valley and Southern Plains states. Ahead of this front, southwesterly winds have ushered warm air up the entire Atlantic seaboard. High temperatures reached the lower and middle 80s F (27-30 C) on Thursday in Washington, Philadelphia, New York, and Boston. Behind the front, a Canadian air mass will move across the eastern half of the country, making for a chilly weekend.

High pressure will continue to move offshore today, while southwesterly winds on the western side of the system will advect warm air into New England again today. By Saturday afternoon, the cold front to our west should have pushed through Boston, bringing cloudy skies and a chance for showers. Temperatures will drop precipitously through Sunday as brisk northwesterly winds funnel much cooler air into the region.

The forecast...

Today: Mostly sunny; high 75 F (24 C).

Tonight: Partly cloudy with southwesterly winds. Low 62 F (17 C).

Saturday: Mostly cloudy with showers; windy. High of 71 F (22 C).

Saturday night: Turning much cooler; low 42 F (6 C).

Sunday: Brisk. Partly sunny and breezy. High 52 F (11 C).

High temperatures will be held between 55 F and 62 F (13-17 C) during the first half of next week.