Arctic air has its grip on the Mid-Atlantic region and it won’t loosen its control anytime soon. Winds will howl today out of the NW and the Arctic cold will stick around through the weekend. A long duration winter storm event will get underway on Sunday and, as a storm intensifies off the Mid-Atlantic coastline, impact can continue all the way into early Tuesday with significant snow accumulations of at least several inches on the table.
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Arctic cold has gripped the Mid-Atlantic region and won’t loosen its control for awhile. Today will turn out to be the coldest day of the winter so far with a biting wind and temperatures struggling to pass the freezing mark for afternoon highs. The Arctic cold will stick around well into the upcoming weekend and attention will turn to the west as the next winter storm as it crosses the nation. That next storm system poses a threat for significant accumulating snow in the Mid-Atlantic region and it can be a long duration event with an impact here from Sunday morning all the way into Tuesday. Snow is likely to arrive here on Sunday morning and there can be 3-5 inches of accumulation by the end of the day at which time mixing of the snow is quite likely to take place. More snow or a wintry mix is possible on Monday and Tuesday as a (secondary) storm intensifies near or just off the Mid-Atlantic coastline.
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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 at or slightly below the 20 degree mark 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. Snow showers caould reach as far as the DC metro region late tonight and a dusting of snow cannot be ruled out. The pressure gradient between the high pressure system and the intensifying Carolina storm will tighten significantly on Thursday 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 lower 30's and overnight lows on Thursday night and Friday night will be within a few degrees of 20. 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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Temperatures are near freezing in many suburban locations as we begin the day with light rain falling in spots so watch for slick spots on untreated surfaces. Later today, temperatures rise well above the freezing mark and only light plain rain will fall at times. 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 associated with the Carolina storm will stay primarily 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 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, but there is plenty of moisture headed in this direction from low pressure moving towards the Ohio Valley. A mix of snow, ice and/or rain is likely to push into the area during late afternoon hours and it could change to all snow for awhile. In fact, there is a chance for a burst of heavier snow an hour or two after the onset of the precipitation as "evaporative cooling" will cause a quick drop in temperatures. Accumulations of anywhere from a coating to 2 or 3 inches are possible during this event with the higher amounts associated with spots that do receive bursts of heavier snow early this evening. Given the cold ground conditions, there can be some slick spots from late today through tomorrow morning. Another storm system will head towards the Carolina coastline by Thursday and its precipitation shield is likely to stay to our south and east.
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