High pressure pushes off the coast today and low pressure will track nearby from tonight into early Saturday. As a result, the chance for more beneficial rain in the Mid-Atlantic region will increase tonight and continue into early Saturday. High pressure will then edge its way into the area tomorrow night and this should result in dry conditions and some sunshine here on both Sunday and Monday.
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There are signals that continue to point to an upcoming cold weather pattern for the central and eastern states as the early part of the winter season gets underway. These signs come from such diverse places as the stratosphere over the North Pole (re: Stratospheric Warming), the stratosphere over the tropics (re: QBO), and the equatorial part of the Pacific Ocean (re: MJO).
To begin, it appears as though there will be a “Stratospheric Warming” event over the polar region of the Northern Hemisphere in coming days which is quite a rare occurrence for this early stage of the winter season. In fact, it appears there have been only two Stratospheric Warming events in recent history that took place during the month of November...2000 and 1968...and in both of those years the month of December was quite cold across the nation. One atmospheric phenomenon that supports the idea of one (or more) “Stratospheric Warming” event(s) this winter season is known as the Quasi-Biennial Oscillation (QBO) which is a changing wind anomaly in the tropical lower stratosphere. When an “easterly” or “negative” phase of the QBO is combined with La Nina conditions in the tropical Pacific Ocean – both of which represent the current situation - there is a strong tendency for an increase in “Stratospheric Warming” events and the disruption of the polar vortex. This particular teleconnection was one of the factors highlighted in the ”2025-2026 Winter Outlook” issued back in October.
Additionally, there is an oceanic-atmospheric phenomenon known as the Madden-Julian Oscillation (MJO) that affects the weather patterns across the globe. The MJO is an eastward moving disturbance of clouds and rain that traverses the planet in the tropics and - depending on its location and the time of the year - it can contribute to colder-than-normal weather patterns across the central and eastern US.
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After another chilly and cloudy day, a warm front will push through the area later tonight and the end of the work week should feature slightly milder conditions to go along with the threat of PM showers. Low pressure will track near us from late tomorrow into Saturday bringing us a continued chance of showers on Friday night and Saturday. High pressure will edge its way into the area on Sunday and the weekend should end with some sunshine on Sunday and also for the first part of next week.
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Rain comes to an end this morning as low pressure pulls away from the region and it’ll remain on the chilly side with afternoon high temperatures in the mid-to-upper 40’s…below-normal for this time of year. A warm front slides across the area later Thursday night and the end of the work week should feature slightly milder conditions to go along with the threat of showers. A weak cold front crosses the area on Friday night and its passage will pave the way for a slightly cooler start to the upcoming weekend.
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It has been quite dry in the Mid-Atlantic region during the past several weeks with below-normal rainfall so far during the month of November, and this current dry stretch has come after the drier-than-normal months of September and October. While not a heavy rain event, low pressure will bring some beneficial rainfall to portions of the Mid-Atlantic region from late today into late tonight with up to half an inch possible in some locations. And, with a cold, dry air mass in place, the precipitation could be a mix of snow, sleet and rain in some spots or even “all” snow for awhile; especially, in those inland, higher elevation locations of the Mid-Atlantic region. In fact, minor snow accumulations of a couple of inches are possible by early tomorrow across places like central PA, northeastern PA, and in the interior sections of northern New Jersey.
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It has been quite dry in the Mid-Atlantic region during the past several weeks with below-normal rainfall so far during November, and this dry spell has followed the drier-than-normal months of September and October. While not expecting a heavy rain event, low pressure will bring some rainfall to the metro region later tonight as low pressure moves in a general eastward direction from the Midwest to the Mid-Atlantic. And, with a cold and dry air mass in place, there is the chance that snow can mix in at times in some of the northern and western suburban locations.
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It has been quite dry in the Mid-Atlantic region during the past several weeks with below-normal rainfall so far during November, and this dry spell followed drier-than-normal months of September and October. While not expecting a heavy rain event, low pressure will bring some welcomed rainfall to portions of the Mid-Atlantic region from later Tuesday into Tuesday night with the highest totals likely along and south of the PA/MD border. And, with a cold, dry air mass in place, the rain could be mixed with snow at times in some of the suburbs north and west of the big cities along the I-95 corridor. Farther inland, there can even be some minor accumulation amounts of an inch or two in, for example, the region between State College and Scranton in upstate Pennsylvania.
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The new week starts off with high pressure in place and then a weak low pressure system will push to the south of here late Tuesday. As a result, today will feature partly sunny skies, but the breeze will remain rather noticeable and temperatures will be well below-normal for this time of year. After a mainly clear night, clouds will thicken up late Tuesday as the low pressure system approaches and there can be a bit of rain at night mainly across the southern portion of the metro region, and a few flakes can be mixed in at times. The overall weather pattern should become milder late in the week, but the warming trend will bring unsettled conditions with the threat of showers from time-to-time.
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High pressure will shift to the east of here by later today and then a low pressure approaches on Saturday night. As a result, there will be increasing clouds here today with chilly and dry conditions and then the chance for rain will increase by later Saturday. Showers could continue into early Sunday and the rest of the day is likely to feature clearing skies, very windy conditions, and dropping temperatures following the passage of a strong cold front. The early part of next week will remain on the chilly side in the Mid-Atlantic region.
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A cold front crossed the region last night and has ushered in a chilly air mass that will stick around in the northeastern part of the country through the first half of the upcoming weekend. High pressure builds into the Mid-Atlantic region today from the Tennessee Valley and should result in dry conditions here into the weekend. On Saturday night and Sunday, a clipper-like low pressure system will pass by to our north and raise the chances of showers from late Saturday night into Sunday. Following the passage of a trailing cold front, another chilly air mass will push into the Mid-Atlantic region for the early part of next week.
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