The weather pattern across the nation will become quite wild over the next couple of weeks with widespread bitter cold and multiple snow threats. After a mild and wet day on Saturday in the Mid-Atlantic region, a strong cold front will pass through the region and not only usher in a colder air mass, but begin a pattern change to more sustained cold. In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around going well into the month of January. In addition to the upcoming cold, there are multiple snow threats going forward including a relatively minor one for the Mid-Atlantic region on Sunday night/early Monday and then a much bigger threat at the end of next week which could be followed by bitter cold air.
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The weather pattern across the nation will become quite wild over the next couple of weeks with widespread bitter cold and multiple snow threats. After a mild and wet day on Saturday in the Mid-Atlantic, a strong cold front will pass through the region and usher in a colder air mass for Christmas Eve (Sunday). In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around going well into the month of January. In addition to the upcoming cold, there are likely to be multiple snow threats going forward including one for the Mid-Atlantic and Northeast US on Sunday night and early Monday (Christmas Day) and then another possible accumulating snow threat at the end of next week.
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After a mild and wet day on Saturday, a strong cold front will pass through the region and usher in a colder air mass for Christmas Eve (Sunday) and Christmas Day (Monday). In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around for the next couple of weeks. Low pressure is likely to form near the coast late this weekend as the colder air filters into the I-95 corridor and this could generate more rain which could change to snow before ending; especially, in the northern Mid-Atlantic and Northeast US. Looking ahead and still in the "speculation" phase, there may be a nice setup at the end of next week for snow in the region.
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This is looking like a relatively quiet week across the country compared to last, but next week could turn out to be quite active with storm threats and brutal cold air is likely to plunge into the US from way up north. The bitter cold air mass will first arrive in the Northern Plains by this weekend and then it should spread across much of the rest of the nation during the early part of next week. “Teleconnection” signals support the notion that it turns very cold next week in much of the nation and the new year is likely to start in the deep freeze for many areas.
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Arctic air plunged into the Mid-Atlantic region late yesterday and temperatures today are well below-normal in DC, Philly and NYC. Meanwhile, a “clipper” low pressure system is dropping southeastward across the Upper Midwest and it should reach southwestern Pennsylvania by later tonight. As a result, snow is likely to break out later tonight in much of the Mid-Atlantic region; primarily, in areas to the north of the Mason-Dixon Line, but even the DC metro region can see some snow shower activity. Any snow that falls with this “clipper” system can quickly cause slippery conditions on untreated roadways given the very cold surface temperatures. Looking ahead to later this month, there are signals for continued cold air outbreaks into the eastern US – perhaps after a temporary milder stretch early next week – and the pattern may become quite stormy as well.
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The biggest weather story of the week in the Mid-Atlantic region is likely to be the bitter cold coming at mid-week because of its unusual nature for this time of year; however, there are also multiple waves of energy in the northern branch of the jet stream that can cause snow on numerous occasions during the upcoming five days or so. The first upper-level system to monitor is likely to generate some snow and/or rain shower activity in parts of the Mid-Atlantic region and there can be some snow squall activity as very cold air pours into the region later tomorrow into tomorrow night. After a very windy and cold day on Wednesday, a second wave of energy will drop southeast towards the Mid-Atlantic region on Thursday and it could generate some accumulating snow in a very cold air mass. Another snow threat will come late Friday into Saturday as a couple of waves of upper-level energy try to consolidate near the Mid-Atlantic coastline and the result could be some more snow for the I-95 corridor region from DC-to-Philly-to-NYC.
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A major pattern change to cold has now begun in the Mid-Atlantic region with the passage of a strong cold frontal system and it is going to get worse before it gets better. This initial shot of cold air is not brutal, not record-breaking by any means, but it is just the front end of a pattern change that will bring even colder air here for the late week and weekend, and then some big time cold is destined to flood the Mid-Atlantic region by the middle of next week. In fact, it is possible that DC, Philly and NYC will struggle to reach the freezing mark for highs by the middle of next week. In addition to the intensifying cold over the next several days, there are some prospects for snow in the I-95 corridor. The first chance of snow will come from later Friday into Saturday, the second shot comes Saturday night into early Sunday, and then the third threat comes in the Tuesday/early Wednesday time frame associated with the mid-week significant cold air outbreak.
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A major pattern change is going to begin on Wednesday in the Mid-Atlantic region and it will result in an extended period with colder-than-normal temperatures. This initial shot of cold will be followed by a reinforcing cold air mass this weekend and then a significant cold air outbreak is likely next week which may accompanied by a coastal storm. The pattern-changing cold front is now crossing the Ohio Valley and it is trailing a powerful storm just north of Lake Superior.
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A major pattern change is going to begin on Wednesday in the Mid-Atlantic region and it will result in a period of sustained colder-than-normal temperatures that will assure a much different December compared to the last five. This pattern change to cold will also include increasing chances for snow – perhaps as early as late this week or during the upcoming weekend – as an active upper-level trough forms in the eastern US associated with the initial cold blast.
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A major pattern change is going to begin in the Mid-Atlantic region during the middle of next week that will likely result in an extended period of colder-than-normal temperatures. In addition, snow will likely become a threat on multiple occasions during the month of December - potentially as early as at the end of next week.
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