The month of January has been much colder-than-normal so far in the central and eastern US, but there are strong indications that we are about to enter a warmer pattern that may last for the next two-to-three weeks. This does not mean that each and every day going forward in this stretch will be warmer-than-normal and there will continue to be cold air outbreaks, but the cold air outbreaks should be relatively short-lived compared to recent weeks and it'll likely average above-normal for each 5-day period going forward into the first week of February. The latest forecast of the Madden Julian Oscillation (MJO) index is supportive of the idea for an extended period of warmer weather in the central and eastern US. Looking beyond this extended warmer stretch; however, the MJO longer-range outlook and a comparison to some analog years, suggest that a colder pattern is likely to return in February and it could very well stick around for awhile.
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High pressure will move offshore over the next 24 hours and this will allow for milder air to push into the Mid-Atlantic this weekend and we’ll likely reach the 50’s on Saturday and come close on Sunday. A cold front will approach the region early next week and bring us the likelihood for some rain later Monday into Tuesday. Following the cold frontal passage, colder air will return at mid-week, but it looks to be only moderately cold and not bitter cold as in recent cold air outbreaks.
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High pressure will build into the region through the end of the week and then move offshore this weekend. This shift to an offshore position will allow for milder air to push into the Mid-Atlantic this weekend and we’ll approach the 50 degree mark for highs on both weekend days. A cold front will approach early next week and bring us the chance for rain showers and then it’ll turn moderately colder by mid-week.
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Low pressure is intensifying off the Mid-Atlantic coast this morning and throwing some snow back into the I-95 corridor. This system will move away rather quickly later today and the snow will cease around here during the afternoon hours and another cold air mass will settle in for the next couple of days. A noticeable warm up will begin at the end of the work week and intensify this weekend with high temperatures by Sunday near 50 degrees in the NYC metro region. This warm up is quite likely to extend into next week as well with rain showers possible by later Monday or Tuesday.
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An accumulating snow event is coming to the DC-to-Philly-to-NYC corridor from late tonight into tomorrow morning and there can be some problems with the Wednesday AM commute in all three metro regions. Cold air will stick around following this snow event for the latter part of the work week, but a noticeable warm up will take place this weekend and continue into next week.
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Upper-level energy will slide across the Midwest today and into the eastern US and will contribute to the formation of low pressure near the Mid-Atlantic coastline by early tomorrow. Meanwhile, a cold front will also play an important role in this upcoming snow event as it will slow down as it arrives in the eastern US late today as it will become aligned parallel to the upper-level wind flow (southwest-to-northeast). As a result, snow associated with the frontal system will tend to last for an extended period of time tonight and then low pressure induced snow will fall early tomorrow. The combination of the front and low pressure system should generate 2-4 inches of accumulating snow in the NYC metro region. The timetable for the snow is primarily from later tonight into tomorrow afternoon with impact likely for the Wednesday AM commute. It'll stay cold following this system for the latter part of the work week with a reinforcing cold air mass ushered in by the frontal passage, but then a noticeable warm up will occur this weekend.
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An accumulating snow event is likely in the Mid-Atlantic region from later tomorrow into Wednesday and it should bring 1-3 inches of snow to the I-95 corridor region from DC-to-Philly-to-NYC. Cold air will stick around following this snow event for the latter part of the work week, but a noticeable warm up will take place this weekend.
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An accumulating snow event is likely from later tomorrow into Wednesday and it could bring 1-3 inches of snow to the I-95 corridor region from DC-to-Philly-to-NYC. A frontal system will work its way to the east coast on Tuesday and then low pressure will likely form along the southern part of that boundary zone and move to a position off the Mid-Atlantic coastline by mid-week. The combination of the front and low pressure system should throw some snow our way in the I-95 corridor with a cold air mass firmly in place. It'll stay cold following this system for the latter part of the work week, but noticeably milder weather will return for the weekend. In fact, temperatures could reach the 50 degree mark by next Sunday in the NYC metro region.
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A very active weather pattern has begun and will continue for the next several days. Heavy rain has already fallen today on much of the I-95 corridor and another round will take place later tonight into early Saturday. An Arctic front will pass through the region by early tomorrow and this will result in about a 50 degree temperature drop between now and early Sunday morning in the I-95 corridor as Arctic air floods the area following the warm conditions of today. The rain could end as a period of sleet and/or freezing rain tomorrow morning as the Arctic air arrives; especially, to the north and west of the big cities. Then, after a couple of dry and cold days, snow may threaten the I-95 corridor from later Tuesday into Thursday as low pressure tries to form near the Mid-Atlantic coastline.
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The overall weather pattern from tonight through the middle of next week will be quite volatile with a wild swing in temperatures of about 50 degrees from today’s highs in the lower 60's to early Sunday morning lows in the low-to-mid teens. This late week "January thaw" will result in heavy rain for the I-95 corridor and thunderstorms could even get mixed into the picture as well as some patchy fog. As Arctic cold arrives in the big cities tomorrow morning, the precipitation could mix with or change to ice and/or snow before ending. Then, after a couple of dry and quite cold days, accumulating snow may threaten the I-95 corridor from later Tuesday into Wednesday as a reinforcing Arctic blast arrives in the eastern US
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