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Boston weather: Wednesday, early sun to a mixed bag late

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Yesterday marked the seventh day this month that measurable snow has fallen in the local area through the first 18 days of February. Milder air is on the way but it will come with a price as showers and periods of rain are expected Thursday night into Friday.

Wednesday presents us with another challenging forecast. Low pressure is going to track out of the eastern Great Lakes and should be centered over eastern Massachusetts late day or this evening. After some early sun, clouds move in and showers break out in the afternoon with a mix of rain and snow inland. Snow could mix all the way to the coast before the precipitation shuts off tonight and there is a possibility that up to an inch of snow may accumulate across the interior.

Partial clearing takes place after midnight and Thursday is looking to be the nicest day of the week with a combination of sunshine and milder temperatures as high pressure pays a brief visit. Although temperatures will actually be milder on Friday the expected rain will put a damper on the day. So, Thursday is our pick of the week. However, clouds and later on showers move across the area Thursday night as a warm front lies to our south. This signals what is ahead for Friday which is an unsettled day for the most part.

Friday, a vigorous and intense low pressure system takes a track across the western Great Lakes during the morning. The attendant warm front will extend eastward all the way to the south coast of New England. How far north that front actually gets is still in question but we expect that it will lift north of our area allowing for a mild day. Periods of rain can be expected for a good portion of the day as the low moves well to our north and in doing so drags a cold front through here Friday night.

We can expect quite a bit of standing water along many of the roadways where drains remain clogged from snow banks both on Wednesday and especially Friday when it will be even milder and the rain heavier. Also, fog could be dense in some locations due to the snow pack and cold ground with the milder air riding over the top. One last note, temperatures are expected to fall below freezing most everywhere Wednesday night thus creating black ice in many locations which could also be an issue for you early Thursday morning commuters. Watch out for those potholes!

Drier weather Saturday as another high pressure gives us a break from the unsettled conditions of Friday. Showers are possible on Sunday.

Next week will gradually turn colder and who knows, more snow may lie ahead later in the week.

72 Hour Outlook:

Wednesday: Becoming cloudy this morning. Chance of snow far interior to rain and snow mixed elsewhere, mostly rain on the coast later this afternoon. High temperatures near 40 along the coast to the mid 30s far interior. Southeast winds 5 to 15 mph.

Wednesday night: Mixed precipitation ending before midnight, followed by partial clearing overnight. Low temperatures mid 20s inland to low 30s on the coast. West to northwest winds 10 to 15 mph.

Thursday: Mostly sunny with an increase in clouds later in the day. Milder, highs in the low 40s. West winds less than 10 mph.

Thursday night. Becoming cloudy with showers developing. Lows in the mid 30s. South to southwest winds around 10 mph.

Friday: Periods of rain and mild. Highs around 50.

Friday night: Chance of showers early, remaining mostly cloudy overnight. Lows in the low to mid 30s.

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