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Boston Weather: 38.0°F | Fair

Weather: Caution: Rain Ahead

By Greg Lawson
STAFF METEOROLOGIST -- This past weekend and yesterday’s beautiful weather and mild temperatures will continue for most of today, though the cirrus clouds we see high above this afternoon serve to remind us that change is inevitable, especially in autumnal New England weather patterns. A tight, strong lower-level shortwave (i.e. an embedded small-scale disturbance) is ripping up the east coast. It will arrive in the Middle Atlantic states sometime late Tuesday evening, about the same time as an upper-level cut-off low coming from the west. As these two strong-willed features duel off, the shortwave will be overtaken and swept northward towards New England, but not without a fight. Increasing cloudiness and stronger winds will precede their arrival here. Once here, sometime early Wednesday morning, there’s the potential for even dangerous weather. We’ll receive rain (heavy at times), cooler air (but still above average), strong southerly winds with very strong gusts (possibly in excess of 50 mph), and even the possibility of some thunderstorms. Thankfully, this should pass out to sea sometime by late afternoon or early evening, leaving us in a cooler air mass. However, the slowing winds will shift to westerly and help dry out the air, allowing things to slowly warm up again. Look for a pleasant and seasonable weekend, perfect for foliage viewing and hiking.

Today: Warm and pleasant. Cirrus clouds rolling-in in the afternoon.

Southerly winds increasing in strength. High of 68°F (20°C).

Tonight: Cloudy and windy. Rain beginning sometime after midnight,

heavy at times. Strong, gusty southerly winds. Low of 57°F (14°C).

Wednesday: Rain and possible thunderstorms continue through afternoon.

Strong, gusty winds continue then subside as storm passes. Clouds break-up as

well. Clear, chilly night. High of 60°F (16°C). Low in the upper 30s (2-4°C).

Thursday: Intermittent cloudiness and still a bit breezy. High only in the

low 50s (10-12°C). Low in the mid 30s (1-3°C).

Friday and Beyond: Partly cloudy. Warming back up to high 50s and low 60s.