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Boston Weather: 49.0°F | Mostly Cloudy

Weather: Fall Rains

Weather

Fall Rains

By Marek Zebrowski
Staff Meteorologist

Following several weeks of tranquil conditions, there are strong indications of changes in flow pattern, with more active systems to affect our region over the next week. These changes are due to a high pressure ridge over the western Atlantic staying put (and perhaps even retrograding westward) and deep, slow-moving low pressure systems over the Great Lakes, which are poised to approach the eastern seaboard over the next few days.

A negative tilted (positioned on a southeast-to-northwest axis) trough will progress from the mid-sections of the country toward our area on Friday and set up a stormy weather scenario for the weekend. The resulting flow of moist, maritime air will cause widespread, possibly copious amounts of rain in the Berkshires and the Appalachian region, whilst a tightening pressure gradient will kick up the seas, causing higher than normal tides and some beach erosion in many coastal locations. The indications of a secondary low pressure system, developing along the surface cold front on Saturday, point to potentially heavy local rains here as well. Sunday, too, will remain unsettled, as the upper low pressure system over the eastern Great Lakes makes very gradual eastward progress.

Alas, raingear will be de rigueur for the regatta.

Today: Mostly cloudy and damp with onshore winds. Coastal fog and drizzle developing in the afternoon. High 58F (14C).

Tonight: Cloudy, with fog, drizzle and spotty rain. Raw easterly winds. Low near 52F (11C).

Saturday: Cloudy and rainy, with increasing southeasterly winds. High 58F (14C). Saturday night will be rainy, windy and raw. Low 52F (11C).

Sunday: Rain slowly tapering off to showers with some breaks possible. Highs in the mid-60s (17-19C), lows in the mid-40s to around 50F (7-10C).