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Boston Weather: 42.0°F | Fair

Weather: The Winds of Change

By Michael J. Ring
STAFF METEOROLOGIST -- The Boston area has experienced some wild swings in temperatures over the past week. Yesterday’s raw weather, with daytime temperatures struggling to maintain 40 F (5 C) and periods of sleet in Boston, seemed unbelievable considering last week the city reached 93 F (34 C), smashing an old record by over 10 F (6 C).

The culprit for the swings in temperature is changes in the direction of prevailing wind. During last week’s record heat, the wind was generally out of the southwest (except immediately along the coast, where a sea breeze occurred). After the passage of a cold front (manifested by the strong thunderstorms on Friday afternoon), the wind shifted from the warm south to the cold north, and temperatures responded, falling to near-winter-like levels yesterday.

With the wind shifting to the west tomorrow night and Wednesday, the weather should be dry and seasonably mild for the next few days. The next chance of precipitation is associated with a cold front currently over the Great Plains, which might bring showers Thursday evening.

Extended Forecast

Today: Mostly cloudy with a few lingering sprinkles. High near 50 F (10 C).

Tonight: Partly cloudy and cool. Low near 38 F (3 C).

Wednesday: Partly sunny with more seasonable temperatures. Highs approaching 55 F (13 C).

Wednesday night: Partly cloudy. Lows near 42 F (6 C).

Thursday: Mostly cloudy, with showers possible at night. Highs around 58 F (15 C) and lows near 43 F (6 C).

Friday: Mostly sunny, with continued near-normal temperatures. Highs near 60 F (16 C) and lows in the lower 40s F (5 to 7 C).