A couple of systems will bring an extended wintry weather event to the Mid-Atlantic region resulting in significant snow and/or ice. The first system will generate precipitation in the region from later this evening into early Monday morning and, with little down time in between, a second and stronger system will bring heavier precipitation amounts from later tomorrow into late Tuesday. Given the expected combination of snow and ice and very cold ground-level conditions, travel may become hazardous for commutes on both Monday and Tuesday in much of the region.
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A couple of systems will bring wintry weather to the Mid-Atlantic region and while neither may be major snow producers, they both can be quite impactful. It appears each of these two systems may bring some snow and ice to the DC-to-Philly-to-NYC corridor in the period from Sunday night into late Tuesday. One disturbance will arrive on Sunday night with precipitation mainly in the form of snow north of the PA/MD border and a mix of snow and ice south of the Mason-Dixon Line. A second and stronger system with more moisture will bring snow, ice and rain to the Mid-Atlantic region from late Monday afternoon into late Tuesday. Given the expected combination of snow and ice and the cold ground-level conditions, roads may become an issue for commutes on both Monday and Tuesday in much of the region. Accumulations of up to a few inches of snow and ice are possible with each event north of the PA/MD border and from a coating to an inch or two south of the PA/MD border.
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An active and complex weather pattern will bring back-to-back threats to the Mid-Atlantic region early next week and there can be some accumulating snow in each event. The first system will be rather weak, but it can still generate some accumulating snow from Sunday night into early Monday in the DC-to-Philly-to-NYC corridor. The second and stronger system will have much more available moisture compared to the first and its main impact will likely take place from later Monday into Tuesday night. This second event could feature a snow-to-ice-to-rain scenario with snow and ice accumulations possible on the front end before any changeover to plain rain.
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The overall weather pattern looks quite active in coming days with multiple waves likely to trek across the country. One wave will arrive in California by the early part of the weekend and then reach the Great Lakes region by Sunday evening. This system will spread snow into the Ohio Valley by later Sunday and then snow could break out here in the Mid-Atlantic region on Sunday night and continue into early Monday. A second and stronger wave will follow quickly and it could bring substantial amounts of precipitation here on Tuesday – perhaps a snow-to-ice-to-rain scenario.
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This week has been featured some unseasonably mild weather in the Mid-Atlantic region, but a strong cold frontal passage on Friday will usher in a much colder air mass for the weekend and there are reasons to believe that we may be entering an extended cold and stormy stretch of weather. A tropical disturbance known as the Madden-Julian Oscillation (MJO) is forecasted to enter into “phases” that argue for colder-than-normal conditions in much the eastern US for an extended period of time. In addition, the overall pattern is shaping up to be quite active with numerous systems likely to cross the country in coming days and threaten this region with lots of wintry precipitation.
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Today will be another damp day in the Mid-Atlantic region with an occasional shower or some patchy drizzle that’ll continue into the overnight hours as a strong cold front approaches from the west. That front will slide through early tomorrow and usher in a much colder air mass for the upcoming weekend. Winds will kick up tomorrow afternoon behind the frontal passage and temperatures will begin to slide. Both weekend days will feature afternoon temperatures primarily in the 30’s despite some sunshine each day. Looking ahead, next week looks quite active with multiple threats and plenty of cold air around. A wave of low pressure may generate some snow or snow showers on Sunday night and/or Monday and then another system may impact the region with snow or rain by Tuesday...stay tuned.
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It’ll be much colder today compared to Tuesday as a frontal passage in the overnight hours has ushered in quite a different air mass compared to yesterday. Some rain is likely here by later today and it'll continue into the overnight hours and we'll stay damp on Thursday with more showers possible as it turns a bit milder. A strong cold front will arrive early Friday and we’ll turn windy and colder late in the day and at night which will set us up for a cold weekend.
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The warm up that began over the weekend and intensified on Monday will likely bring temperatures to the 60 degree mark today in the NYC metro region. High pressure moving eastward across southern Canada will push colder air our way later tonight and tomorrow will feature a one day return to seasonably cold conditions in the Mid-Atlantic region. A chilly rain is likely late tomorrow and tomorrow night and then it'll turn milder again on Thursday with showers possible. On Friday, a strong cold front will approach and it'll stay quite mild with a continuing threat of showers. That cold frontal system will pass through the region late Friday and usher in much colder air for the upcoming weekend.
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The warm up that began over the weekend will continue for the next couple of days with highs temperatures in the mid 50's today and not far from 60 degrees on Tuesday. A couple of showers are possible tonight as a frontal system is dragged through the region by low pressure to the north, but the bulk of today and Tuesday will be rain-free. A cold front will usher in colder air at mid-week, but it’ll turn milder again late in the week ahead of a strong cold front which should arrive here later Friday and set the stage for a much colder weekend.
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Fast-moving low pressure will spread some snow into parts of Mid-Atlantic region today, but it should stay primarily south of the NYC metro area. This low pressure system is part of a transition in the overall weather pattern from the recent bitter cold to milder conditions that’ll begin here this weekend. We’ll gradually step up in temperatures this weekend and then the real break in the cold will be experienced in the Monday-to-Wednesday time period of next week. Cold air, however, is likely to return at the end of next week following our temporary break in the cold.
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