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Boston Weather: 28.0°F | Overcast

Weather: Mind the Gap

By Greg Lawson
Staff Meteorologist

We are going to spend the next two days delicately in balance between two precipitating weather systems. A large, almost stationary low pressure center has established residency in the Canadian maritimes. Spinning cyclonically, it will pipe in fairly strong northwesterly flow from Canada. The northwesterly flow will be supported by a strong high center to the west of the low. Even though the low is bringing in moist air from off the ocean, the added influence of the high should tend to bring us mainly cold, dry, continental air. This low, however, is carrying moisture and hence will have precipitation associated with it. Being on the fringe, we will only have clouds throughout the day. The low will begin to move out to sea Wednesday morning.

There is precipitation to our south also. A wide rain band roughly following the western edge of the aforementioned high is being advected eastward by a fairly zonal sub-tropical jet stream. Luckily, the jet is east-west enough so that the rain and its associated clouds should stay well to our south, probably reaching no farther north than southern New Jersey. Southern New England is perhaps the only part of the east coast which will survive some form of precipitation over the next two days. It is difficult to say at this point, but it is certainly possible that as the low blows out to sea it could bring in some "wrap-around" precipitation, making Thursday a drizzly, dreary day.

Today: Breezy, northwesterly winds. Cloudiness throughout the day. High 49F (10C).

Tonight: Continued winds and cloudiness. Chilly. Low 34F (1C).

Wednesday: Winds slightly weakening and shifting to westerly. Partly cloudy. High 47F (8C). Low in the low 30s (-11C).

Thursday Outlook: Possibly some drizzle or showers. High in the upper 40s (79C). Low in the mid 30s (13C).