The coldest air of the season so far has arrived in the Mid-Atlantic region and temperatures today will be confined to the 30’s which is well below normal for this time of year. In addition, the winds will be quite strong causing even lower wind chill values and there can be some snow shower activity in the immediate I-95 corridor. The below-normal chill will continue through the upcoming weekend and it looks like there will be another Arctic blast reaching us by the middle of next week. As far as precipitation is concerned, low pressure will approach at the end of the weekend and it is likely to produce snow and/or rain around here Sunday night and Monday.
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The coldest air so far this season will begin to impact the region later today and temperatures on Friday will be confined to the 30’s – well below normal for this time of year. In addition, the winds will be quite strong on Friday causing even lower wind chills and there can be some snow shower activity reaching the I-95 corridor. This Arctic blast will help to generate significant snow shower activity just downstream of the Great Lakes over the next couple of days. The below-normal chill will continue through the upcoming weekend before a bit of a warmup early next week, but that warm up will be brief and followed by another widespread and significant Arctic outbreak likely reaching us here around Tuesday. As far as snow is concerned, low pressure will approach by Sunday night bringing us a good chance for some snow and then snow and/or rain on Monday.
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The flood gates appear to have opened up for multiple Arctic air masses to plunge from northwestern Canada/Alaska into the US over the next few weeks and this type of weather pattern will surely increase the odds for snow around here. By no means is there anything set in stone yet for the snow, but the unfolding weather pattern will be much more favorable compared to recent weeks. One Arctic blast is already being felt today across the northwest and north-central part of the country and will arrive here later tomorrow/tomorrow night. By Friday, temperatures will be confined to the 30’s for the afternoon highs, strong NW winds will produce even lower wind chill values, and there can be some snow shower activity. A second Arctic blast will drop out of Canada into the northern US early next week and it should arrive here during the middle of next week. Looking even farther ahead, there are signs for yet another (third) Arctic blast to follow as we progress into the second half of December.
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Low pressure just off the Mid-Atlantic coastline this morning will move away to the northeast and a cold front will approach from the northwest later in the day. Colder air will push into our region on Thursday following the passage of the frontal system and by Friday, temperatures will be confined to the 30's for highs. In addition, winds will increase by Friday generating even lower wind chill values and there can be a snow shower or two. The below-normal cold will continue through the upcoming weekend and it looks like there will be additional Arctic blasts into the eastern US over the next couple of weeks.
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Precipitation is advancing northeastward this morning from the Southeast US and should arrive here during the late afternoon hours. This moisture will encounter some cold air in the Northeast US that is currently being anchored by strong high pressure. As a result, there can be some sleet and/or snow to mix in at times in the northern and western suburbs and a few inches of snow can accumulate during this event in the Poconos, NE PA and NW NJ. Low pressure headed for the Ohio Valley early today will transfer its energy to a newly forming coastal low near the NC/VA border and this will become the primary system later today. The precipitation will end late tonight from southwest-to-northeast across the NYC metro region. After a bit of a milder day on Wednesday, the coldest air of the season so far will arrive later Thursday. On Friday, temperatures will do no better than the 30’s for highs, the wind will generate even lower wind chill values, and there can be some snow shower activity. The below-normal cold will continue through the upcoming weekend and it looks like there will be additional Arctic blasts into the eastern US over the next few weeks.
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Low pressure will track northeastward on Tuesday towards the Mid-Atlantic region and will ultimately transfer its energy to an intensifying secondary low near the North Carolina/Virginia coastline. At the same time, strong high pressure situated over the Northeast US will be reluctant to give up its ground on Tuesday as it anchors a cold air mass. As a result, moist air pushing to the northeast will overrun the cold air in place and evaporative cooling will cause low-level temperatures to drop at the onset and then dynamical cooling will cause upper-level temperatures to drop later in the event. The end result of this unfolding scenario is that some frozen precipitation in the form of sleet and/or snow is liable to fall at times during this event across some of the northern and western suburbs of the big cities along I-95. Precipitation will taper off from SW-to-NE late Tuesday night/early Wednesday as the coastal low moves out to sea. After that, the coldest air mass so far this season will head our way for the late week and weekend. This late week Arctic blast will very likely be just the first of many in the eastern US over the next few weeks.
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One system pushes away from the region this morning and then another one with more available moisture arrives on Tuesday. In fact, tomorrow's system is likely to generate 0.50 to 1.00 inches of rainfall in the I-95 corridor region from DC-to-Philly-to-NYC primarily during the PM hours. Later in the week, much colder air pushes into the Mid-Atlantic region and temperatures on Friday, Saturday and Sunday are likely to generally be held down in the 30's for highs.
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Colder air moved into the Mid-Atlantic region on Thursday and it’ll stick around right through the upcoming weekend. High pressure building eastward from the Ohio Valley should keep us dry today, tomorrow and Sunday, but also quite chilly for early December. By Sunday night and Monday, moisture will advance towards us from both the Deep South and the Great Lakes and it could result in some snow, sleet or rain alte at night into early Monday. More significant moisture could reach us on Tuesday which could result in another decent rainfall. This same system is likely to produce additional beneficial rains for the south-central and southeast US before heading our way. Looking ahead, a widespread Arctic blast of colder-than-normal air will cross the nation next week and likely arrive here around Friday and it could be preceded by rain and a brief warmup.
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A low-level westerly flow of air will dry us out today and bring somewhat cooler air to the region compared to the past couple of days and then even colder air will push into the Mid-Atlantic region for the upcoming weekend. By late in the weekend or the early part of next week, moisture from the southern states could advance far enough to the north to produce some precipitation around here and it could be just cold enough for some of that to be of the frozen variety. After that, a brief significant warmup is possible later next week ahead of an advancing widespread cold air outbreak that should reach us by the end of the week.
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A very active weather pattern shaping up for the next ten days or so. Moisture will ride up today along a stalled out frontal boundary zone into the Mid-Atlantic region from the Deep South and the result will be more heavy rainfall. In fact, there will be significant rain into tonight up and down the I-95 corridor and a few thunderstorms can mix in as well in these unseasonably warm conditions. The frontal system finally pushes through on Thursday and we’ll dry out some and cool down compared to the warm conditions of today. Even colder air pushes in on Friday and the weekend looks like it’ll turn out cold with mainly dry conditions to start. By late in the weekend, a storm from the southern states could affect us and it may be just cold enough to make it interesting. Looking ahead, all signs point to a major league widespread cold air outbreak by the end of next week across much of the US.
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