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Boston Weather: 35.0°F | A Few Clouds

Weather: Fair Weather February

By Greg Lawson

There's little of major interest on the weather front for the next day or so. We have a fairly zonal jet stream centered just to our south. Today a weak occluding low to our northwest will ride a short surface thermal wave by us just to our north. The leading edge of the wave's ridge is the low's warm front and its trailing edge is the cold front. Both will pass before tomorrow. Neither front has yet produced any serious precipitation and we can count on a dry afternoon and evening as well, though there will be some thick clouds early on. After the late evening passage of the cold front, the smooth zonal profile will be restored and a high pressure system from the mid-west will begin settle in over us. And here it will remain through late Thursday, ushering in with it mostly sunny skies and unseasably warm temperatures.

The really interesting phenomena follow closely behind the high. A very deep trough is developing in the jet stream out over the west. As it travels eastward it will deepen further. By Thursday we will be under the ridge and hence will have very warm temperatures, probably in the mid to upper 50's. But, as with all waves, the trough will be in close pursuit from the looks of the models, we could be in for a frigid weekend. There may be some organized rain and/or snow forming, but it is too early in the week to tell for sure. In the meantime, enjoy the clear skies and warmth.

Tuesday: Cloudy early on then clearing. Southwesterly winds picking up. High 45F (7C).

Tuesday Night: Clear and warm. Moderate westerly winds. Low 35F (2C).

Wednesday: Beautiful. Mostly sunny and unseasonably warm. High 48F (9C). Low in the mid 30s (1-3C).

Thursday: Even warmer. High pressure center eventually pushed out to sea. High in the mid to upper 50s (13-15C).

Friday and Weekend Outlook: Arctic air on its way. Possible precipitation associated with very deep trough.