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Boston Weather: 40.0°F | A Few Clouds and Breezy

Weather: Frosty Forecast

By Veronique Bugnion
STAFF METEOROLOGIST -- The first frost warning of the year for Southern New England was issued last night, with the following recommendation: “act now to protect tender vegetation.”

The high pressure system responsible for these clear skies and low temperatures will not be sufficiently strong to prevent clouds from rolling in again soon. A warm front will past through on Saturday, bringing temperatures back to normal. The next perturbation will begin to be felt on Sunday with possible showers late during the day.

Meanwhile, the tropics are still active: hurricane Irene is slowly moving away from Cuba and heading for the Florida Keys. It is predicted to strengthen as it moves over the warm waters of the Florida Straits.

Weekend Summary

Today: Mostly sunny. High 55°F (13°C) to 60°F (16°C).

Tonight: Becoming partly cloudy. Low 45°F (7°C) to 50°F (9°C).

Saturday: Mostly sunny. High in the mid 60s (14 - 20°C).

Sunday: Partly cloudy, chance of showers late. High in the 60s.

Monday: Rain likely. High in the 50s. (11 - 14°C)