The threat for a snowstorm is increasing from Philly to Boston and accumulating snow is likely down to the DC metro region. The weather pattern will be very active in the I-95 corridor over the next 48 hours ranging dramatically from near record warmth in some spots to accumulating snow. It’ll be much warmer today in the southern Mid-Atlantic region and those unusually warm conditions will extend on Wednesday into the rest of the Mid-Atlantic region and there will be some shower activity to go along with the warm up. Colder air will then push into the region tomorrow evening at the same time low pressure forms in the Mid-Atlantic region. Rain is likely for awhile tomorrow night, but then as colder air moves in a changeover to snow will take place from northwest-to-southeast. By early Thursday morning, intensifying low pressure will be just off the Mid-Atlantic coastline and the snow could be falling heavily; especially, in places north of the PA/MD border. When all is said and done, this is likely to be the heaviest snowfall this season in many areas north of the PA/MD border with several inches of snow on the table. This storm will likely head all the way up along the coastline dumping accumulating snow on eastern New England as well.
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The weather pattern will be very active in the I-95 corridor over the next few days ranging from rain and high temperatures in the 60’s to the potential for some accumulating snow. It’ll turn much warmer for today and Wednesday and the warm up will be accompanied by some shower activity. Colder air will then push into the region late tomorrow and this temperature transition may result in a period of rain changing to snow. The greatest chance for accumulating snow in the DC metro region late Wednesday night and early Thursday will be in the northern and western suburbs.
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The weather pattern will be very active in the I-95 corridor over the next few days ranging wildly from rain and high temperatures in the 60’s to the potential for some accumulating snow. It’ll turn much warmer on Tuesday and Wednesday in the DC-to-Philly-to-NYC corridor and the warm up will be accompanied by some rainfall. Colder air will then push into the region late Wednesday night and early Thursday and this temperature transition may result in a period of rain changing to accumulating snow. The greatest chance for accumulating snow late Wednesday night and early Thursday in the I-95 corridor will be in the northern and western suburbs and likely to the north of the Pennsylvania/Maryland border.
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Quite an active few days is in store for the Mid-Atlantic region and it is within the realm of possibility that the DC metro region transitions from highs in the 60's on Wednesday to accumulating snow by early Thursday. Temperatures will take quite a swing over the next few days with a big upswing later tomorrow and Wednesday and then a sharp drop off on Thursday. A warm front will generate some rain late tonight and Tuesday and then a cold front will produce showers and windy conditions on Wednesday. Winds will remain pretty strong on Wednesday night and Thursday as colder air floods into the region from our northwest. In addition to the change back to cold, it is likely that a storm forms along the frontal boundary zone and heads towards the Mid-Atlantic coastal waters late Wednesday night and early Thursday morning and this could result in some accumulating snow for the I-95 corridor region; especially, to the N and W of the big cities.
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The next couple of days will be quite cold in the Mid-Atlantic region and well below normal for this time of year. A weak area of low pressure will arrive on Sunday and it could generate a rain or snow shower in the region, but nothing significant. A more important system will arrive for the Tuesday/Wednesday time frame and it will feature a decent amount of precipitation for the entire Mid-Atlantic region. After a mild and wet couple of days on Tuesday and Wednesday, much colder air will sweep into the region for the latter part of next week.
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A cold front will cross the region today and high pressure will build into the region as we approach the weekend. Temperatures will drop down a notch today compared to the very mild conditions of yesterday and then the next two days and nights should turn out to be quite cold. A weak area of low pressure will arrive on Sunday and this could generate a couple of rain or snow showers, but nothing significant. Another system will approach the area next Tuesday/Wednesday and it looks like it will likely be a plain rain event around here.
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A “clipper” system passed by well to our north on Tuesday and there will be a couple of additional weak disturbances moving along in the fast-moving upper-level jet stream over the next couple of days. High pressure will then build into the region by Friday and it’ll turn colder as we head towards the weekend. An area of moisture is likely to arrive in the region on Sunday - perhaps as a snow/rain mix - but it does not look like it will be anything significant.
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A fast-moving (a.k.a., clipper) low pressure system will spread snow into the Mid-Atlantic region this morning; primarily, on the north side of the PA/MD border. There can even be some snow shower activity this morning across far northern sections of the DC metro region with little or no accumulation expected around here. The pattern quiets down some later this week and remains generally on the cold side of normal.
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Low pressure is pulling away from the Mid-Atlantic coastline at this time, but it is intensifying as it does, and there will be enough instability in the atmosphere behind it to produce scattered snow showers in the DC-to-Philly-to-NYC corridor over the next few hours. There can also be a heavy snow squall or two this afternoon which would quickly drop visibilities, whiten the ground, and cause slippery road conditions. By tonight, this area of instability will push off the coast and attention will turn upstream where a fast-moving system will be dropping southeastward from the Northern Plains.
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Low pressure will pull away from the Mid-Atlantic coastline this morning, but the atmosphere will remain unsettled and there can be a snow shower at just about anytime and maybe even a heavier snow squall this afternoon. Another system will slide into the Northeast US on Tuesday from the Great Lakes region and bring with it the chance for snow; primarily, north of the PA/MD border, but it could extend to our northern sections.
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