The month of December is now underway and after a seasonably chilly day on Wednesday, it’ll turn windy and noticeably milder this afternoon with temperatures making a run to 65 degrees in DC, 60 in Philly, and to 55 degrees in NYC. This warm up will be rather short-lived, however, for at least the central and northern part of the Mid-Atlantic region as the next cold front will usher in chillier air for tomorrow and the upcoming weekend. The weather pattern for next week looks quite active with a strong cold front arriving in the eastern states early and then two systems could follow – one at mid-week and the second one in the late week. The cold air mass in the northeastern states that arrives early next week will be reluctant to retreat to the north and this could result in some snow and/or ice by mid-week in portions of the Mid-Atlantic and Northeast US.
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Following the passage of a warm front, winds will pick up in intensity today and temperatures will climb to noticeably milder levels and make a run past the 55 degree mark. A cold front will arrive later tonight and there will be a downward trend in temperatures going into the weekend as high pressure builds across southeastern Canada. The next strong cold front will arrive in the Mid-Atlantic region on Monday and its passage will usher in colder-than-normal air for much of the first half of next week. By the middle of next week, moisture from a quick-moving system could arrive with enough cold air still in place for snow and/or ice in some parts of the Mid-Atlantic region.
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Weak high pressure will take control today, but then a warm front will lift northward tonight and it could generate a few rain and/or snow showers in the region. Following the passage of the warm front, winds will pick up in intensity on Thursday and temperatures will climb to noticeably milder levels. A cold front will arrive on Friday and there will be a downward trend in temperatures this weekend as strong, cold high pressure builds across southeastern Canada.
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An upper-level disturbance passed through the Mid-Atlantic region on Monday generating some instability in the atmosphere, plenty of clouds, and even isolated snow shower activity. Today may be a pretty close resemblance to yesterday as another upper-level disturbance passes overhead. There will be plenty of clouds, maybe even a little snow at times, but the winds won’t be as noticeable as on Monday. A warm front could cause a few rain and/or snow showers on Wednesday night and it’ll turn noticeably milder on Thursday following its passage.
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Low pressure will pull away from the Mid-Atlantic coastline today and head towards the Canadian Maritimes. In its wake, it’ll be a windy and cold day as the month of November winds down. High pressure will build into the region and remain on control through the mid-week time period. Milder conditions are likely in the Mid-Atlantic region for Thursday following the passage of a warm front.
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Thanksgiving Day will feature a warm up in the eastern states as a low-level southwesterly flow of air develops on the back side of high pressure off to the east. This warm up will be rather short-lived, however, as a strong cold front pushes through by early Friday. There can be a few showers with the frontal passage late tonight and early tomorrow, but this will not be a heavy rain event. The winds will become quite strong on Friday with gusts past 35 mph to go along with the colder-than-normal conditions. The weekend begins on the cold and dry side and then attention will turn upstream for the next in a series of disturbances that will drop south and east out of Canada into the US. The late weekend disturbance will be rather potent and it will come with a reinforcing cold air mass for the eastern states. There is the chance that this upper-level feature will be able to spawn the formation of surface low pressure near enough to the east coast for some snow to fall across portions of the Mid-Atlantic/NE US in the Sunday/Monday time frame.
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Today remains colder-than-normal in the Mid-Atlantic/Northeast US, but conditions will be much less harsh than they were on Tuesday with little to no wind to speak of and plenty of sunshine. Milder weather pushes in on Thursday, Thanksgiving Day, but the warm up will be short-lived. Another cold air mass arrives on Friday in the northeastern quadrant of the nation and the big shopping day will become quite windy with gusts past 35 mph to go along with below-normal temperatures. It stays cold this weekend and there remains a threat for some snow in the Mid-Atlantic/Northeast US on Sunday and/or Monday.
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Today will be another cold day in the Mid-Atlantic region, but with much less wind than Tuesday so it’ll feel less harsh and it will certainly be a good day to travel with precipitation-free conditions. It turns slightly milder on Thursday with high temperatures likely to bounce back up into the 50’s, but the warm up will be brief. Another strong cold front pushes through the area by early Friday and it’ll turn out to be another cold and windy day as we end the work week. The weekend remain on the cold side and a couple of upper air disturbances will have to be closely monitored in coming days for possible impact during the early part of next week. If pieces fall into place at the right time, there could be some snow or snow shower activity in the Mid-Atlantic region in the Sunday/Monday time frame…stay tuned.
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A strong cold front passed through the region early yesterday and ushered in a cold air mass for the region and it’ll stay windy and colder-than-normal today. While it stays cold on Wednesday, the winds will be far less of a factor and it’ll feel less harsh as a result. Thanksgiving Day actually turns a bit milder with highs back up in the 50’s, but then the next strong cold front will usher in another cold air mass for Friday and winds will be quite strong once again as we end the work week.
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One cold air outbreak reached the Mid-Atlantic region late last week and another one is arriving today on increasing NW winds and a third one will arrive at the end of the week. In fact, it is possible that the only day of the next several that is at or slightly above-normal in terms of temperatures could be Thursday, Thanksgiving Day. While the overall pattern does favor additional cold air outbreaks for the Mid-Atlantic region in coming days, the chances for snow are more elusive. There is one system, however, that could become a player in about a week’s time and it will have to be monitored over the next few days for possible snow in the Sunday/Monday time frame. Looking ahead, one index known as the Madden Julian Oscillation (MJO) signals that cold air outbreaks may continue into the first half of December for the eastern half of the nation.
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