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Boston Weather: 39.0°F | A Few Clouds

Weather: The Highs and Lows of Forecasting

By Michael J. Ring
STAFF METEOROLOGIST -- The competition between two differing pressure masses to the north and south of New England makes this week’s forecast a tricky one.

A cold front currently extends along the east coast of the United States, and two regions of low pressure are located along the front.

The first center is associated with last night’s snow; a second center of low pressure is currently located over Mississippi and is expected to move northeastward along the front.

At the same time, a very strong region of high pressure has moved from the Hudson Bay into Quebec, bringing fair weather to Eastern Canada and trying to block the movement of storms coming into New England. Indeed, Boston received a glancing blow from last night’s storm, with New York bearing the heaviest snowfall.

This week’s weather depends on the ability of the Quebec high to block the northward progression of low pressure systems. If the high remains strong then we should receive a few days of clear (albeit cool) weather; however, it is expected to weaken enough to allow some cloud cover to stream in -- perhaps sparking some rain showers tomorrow -- before the next serious bout with precipitation on Friday.

Extended Forecast

Today: Steady snow ending by noon, but lingering rain and snow showers throughout the day. Cold and windy with highs near 35°F (2°C).

Tonight: Scattered flurries. Lows near freezing.

Tomorrow: Cloudy with a chance of rain showers. Milder with highs near 43°F (7°C).

Tomorrow night: Partly cloudy. Lows near 35°F (2°C).

Thursday: Mostly cloudy with seasonable temperatures. Highs near 52°F (11°C) and lows near 40°F (4°C).