Winds have increased markedly today as an Arctic air mass arrives in the Mid-Atlantic/Northeast US from the eastern part of Canada. Temperatures will plunge in the overnight hours and Friday promises to be the coldest day of the winter season so far with continuing biting-cold NW winds. The Arctic cold will stick around well into the upcoming weekend and attention will turn to the west as the next winter storm crosses the nation. That storm poses a threat for significant accumulating snow in the Mid-Atlantic region and it could turn out to be a long duration event with potential impact all the way from Sunday into Tuesday.
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Increasingly strong N-NW winds today will signal the arrival of an Arctic blast that will halt temperatures in their tracks today and result in overnight lows in the teens and tomorrow will turn out to be the coldest day of the season so far. The Arctic cold will stick around well into the upcoming weekend in the Mid-Atlantic region and attention will turn to the west as the next winter storm crosses the nation. That next storm system poses a threat for accumulating snow in the Mid-Atlantic region from later this weekend into the early part of next week and its impact could actually extend from Sunday into Tuesday…stay tuned for more details on this upcoming and complex winter storm threat.
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Yesterday’s light wintry mix in the Mid-Atlantic region has pushed off to the northeast and a look ahead includes an Arctic blast and a potential major winter storm. Increasingly strong NW winds later tomorrow will signal the arrival of an Arctic blast that will bring temperatures down to the teens by early Friday and the last day of the work week will turn out to be the coldest so far this season. The Arctic cold will stick around well into the upcoming weekend in the Mid-Atlantic region and attention here will turn to the west as the next winter storm crosses the nation. That storm poses a threat for accumulating snow in the Mid-Atlantic region beginning late in the upcoming weekend and it could turn out to be a significant and long duration event with an impact all the way into late Tuesday.
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After high pressure takes control of our weather today, low pressure will intensify near the Carolina coastline late tonight and on Thursday. The pressure gradient between the high pressure system and the intensifying Carolina storm on Thursday will tighten significantly and winds will become quite noticeable around here. The increasingly strong NW winds will usher in a very cold air mass for the end of the week and it’ll stick around for much of the weekend as well. High temperatures on Friday will be confined to the 20's and overnight lows on Thursday night, Friday night and Saturday night are likely to be in the teens. Another storm system will cross the country this weekend and threaten the Mid-Atlantic region with snow or a snow/rain combination in the late Sunday/Monday/early Tuesday time frame. This scenario could feature an initial wave of low pressure headed to the Ohio Valley and then the formation of a secondary storm off the Mid-Atlantic coastline.
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A wintry mess of snow, sleet, freezing rain, and/or plain rain continues in parts of the Mid-Atlantic region at mid-day and temperatures remain near the freezing mark in many locations. As a result, there can be slick spots this afternoon and evening on untreated surfaces in suburban locations along the I-95 corridor even as the precipitation winds down. After a drier and quieter day on Wednesday, low pressure will intensify off the Carolina coastline on Thursday and winds in the DC-to-Philly-to-NYC corridor will pick up noticeably as a very cold air mass pushes in from the northwest. The end of the week and the beginning of the weekend will indeed feature some of the coldest air yet this season and then attention will turn to the next storm threat which could bring snow by late in the weekend or the early part of next week.
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A wintry mix of light snow, sleet and/or rain is likely later today and tonight and there can be slick spots on untreated surfaces given the cold ground conditions. The moisture field from low pressure off the Mid-Atlantic coastline will shift away to the northeast of here on Wednesday and then low pressure will intensify near the Carolina coastline by Thursday. The precipitation from the Carolina storm should stay well to the south of here on Thursday, but this system will help to pull down a very cold air mass from Canada for the end of the week and for the weekend. Another storm will threaten the Mid-Atlantic in the Sunday/Monday time frame and it has potential to have a high impact on the region.
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A wintry mess of snow, sleet, freezing rain, and plain rain is coming to the Mid-Atlantic region as low pressure heads from the south-central states to the Ohio Valley. A dense dry and cold air mass is in place across the Mid-Atlantic region and it will be reluctant to give up its ground as moisture pushes in this direction from the west-to-southwest. As a result, frozen precipitation is a good bet during this event in the entire DC-to-Philly-to-NYC corridor and the progression of the moisture field to the northeast will be quite slow. The arrival time in the DC metro region should be 4 or 5 pm and there is the threat for a burst of heavier snow by early tonight - an hour or two after the onset of the mixed precipitation. Arrival time in the Philly area is late this evening and precipitation will probably hold off until tomorrow morning for the NYC metro region.
Looking ahead, the active weather pattern will continue and another storm is going to intensify near the Carolina coastline Wednesday night/Thursday and its impact in the DC-to-Philly-to-NYC corridor is likely to be limited. Yet another storm could travel across the country this weekend and perhaps have an impact in the Mid-Atlantic region in the Sunday/Monday time frame.
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A cold, dry air mass is in place across the region as we begin a new work week and there is moisture headed in this direction from a low pressure system moving towards the Ohio Valley. The dense cold, dry air mass will inhibit the northeast movement of this moisture and precipitation is likely to hold off here until early Tuesday. Occasional snow is likely on Tuesday and it can linger through tomorrow night at varying rates and it will mix with sleet and/or freezing rain at times. Accumulations of anywhere from a coating to a couple of inches are possible during this event and, given the cold ground conditions, there can be slick spots on untreated surfaces from early tomorrow into early Wednesday.
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A wintry mess of snow, sleet, freezing rain, and rain is coming to the Mid-Atlantic region early this week as low pressure heads from the central states to the Ohio Valley. A cold, dry air mass will still be in place on Monday morning when moisture begins to head in this direction from the west-to-southwest. This dense air mass will be reluctant to give up its ground; consequently, the northeastward progression of the precipitation along the I-95 corridor will be rather slow and some frozen precipitation is a good bet. In addition, the moisture field will tend to break apart some by the time it reaches areas to the north of the PA/MD border. Arrival time in the DC metro region is likely mid-to-late afternoon on Monday, late evening in Philly, but not until early Tuesday in NYC. A late week storm is likely to head towards the Carolina coastline with little impact likely in the DC-to-Philly-to-NYC corridor.
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A frontal passage later today will usher in a very cold, dry air mass for the weekend in the Mid-Atlantic region with highs confined to the 30’s on both days all along the I-95 corridor. This cold, dry air mass will still be in place on Monday morning when moisture begins to head in this direction from a low pressure system over the Ohio Valley. A second low pressure area will form off the Mid-Atlantic coastline by early Tuesday and the combination of these two systems will result in a wintry mess in the Mid-Atlantic region from later Monday into Tuesday.
In areas to the north of the PA/MD border, snow and/or ice are likely to be the primary precipitation types and accumulations of up to a few inches are on the table. To the south of the PA/MD border, there is likely to be a mix of ice and rain with some snow possible at times and small accumulations are possible. Another storm could impact the Mid-Atlantic region later next week; however, its northward reach is still uncertain this far in advance and it could be suppressed to the south. Looking way ahead, there can be yet another storm threat a few days later as the active weather pattern continues into the early part of February.
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