The passage of a cold front will bring about big changes in temperatures in the Mid-Atlantic region with today’s 60’s plunging to the freezing mark by early tomorrow. This influx of cold, dense air in the overnight hours will set the stage for a wintry mess from later tomorrow into early Friday. Some parts of the Mid-Atlantic will experience accumulating snow at the onset of this winter weather event and other areas will likely end up with a significant ice buildup including across much of southern and central Pennsylvania. The Friday AM commute is likely to an icy mess from the suburbs of Philly to the north and east including in and around the NYC metro region.
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Today will be another mild day in the Mid-Atlantic region with periods of rain as low pressure pushes from the Upper Midwest towards the southeastern part of Canada. The current mild stretch will peak on Wednesday afternoon with the breakout of sunshine after a cloudy start and temperatures are quite likely going to reach 65-70 degrees in the DC-to-Philly-to-NYC corridor. The passage of a cold front later tomorrow will then bring about big changes in the temperature department in the overnight hours setting the stage for a winter weather event from later Thursday into early Friday. The winter weather event could include some snow accumulations; primarily, across the northern Mid-Atlantic and a potential significant buildup of ice in places like southern and central Pennsylvania.
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It’ll be quite mild in the Mid-Atlantic region through mid-week, but then it turns much colder on Thursday and that cool down could be accompanied by some icing in much of the area. Temperatures today should make it into the 50’s and they’ll remain on the mild side on Tuesday, but it’ll become quite wet as well with a decent rainfall on the way from later tomorrow into tomorrow night. The warmest day of the week is likely to be on Wednesday ahead of the next cold front with temperatures likely to climb well up in the 60’s, but then big temperatures changes will take place by Thursday. Looking beyond the possible ice event later Thursday, numerous signs point to a continuation of winter weather conditions in the eastern states as we wind down the month of February and then flip over to March. In fact, there is a good chance for a very cold air mass to arrive in the east by early next week and it could be preceded by some snowfall.
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There will be very active weather from later tonight into early Friday in the Mid-Atlantic/Northeast US associated with the approach and passage of a strong cold frontal system. Temperatures are surging today ahead of the strong cold front and showers will become numerous from later tonight into early Friday and there can be a strong thunderstorm or two mixed into the picture. Of more concern, however, is the likelihood for powerful winds and there can be potentially damaging wind gusts; especially, in the time period surrounding the arrival and passage of the strong cold front. In the hour or so immediately behind the frontal passage, the pressure will spike, winds will shift in direction, and gusts can reach their highest levels. Temperatures will drop through the day on Friday after early day highs and the winds will die down tomorrow night. A reinforcing shot of cold arrives on Saturday and it will be supported by a very strong upper-level disturbance resulting in scattered snow showers/squalls and wind gusts past 40 mph.
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The powerful winds of late Thursday night and early Friday will diminish on Friday night; however, the next strong system will produce 50+ mph wind gusts on Saturday in the northeastern quadrant of the nation and there can be snow showers and even heavier snow squalls. After that, there are signs for a big time warm up in the eastern states in the Monday, Tuesday and Wednesday time period with temperatures likely to climb into the 50’s and 60’s. There are also signs, however, that next week’s warm up will be a temporary break from winter weather and that there will be a resurgence of winter weather as we get to late next week and beyond. In fact, an evolving stratospheric warming event and the trending pattern of Pacific Ocean teleconnection indices suggest that winter’s wrath could hang around well into the month of March across the eastern states with additional cold air outbreaks and multiple new snow threats.
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It looks like there will be a very active frontal passage in the Mid-Atlantic region and Northeast US from later tomorrow night into early Friday. Temperatures will surge on Thursday ahead of the strong cold front and showers will become numerous on Thursday night. In fact, some of the rain can briefly fall on the heavy side later tomorrow night into early Friday and there can be a thunderstorm or two mixed into the picture.
Of more concern, however, is the likelihood for powerful winds and there can be potentially damaging wind gusts with scattered power outages certainly on the table. The likely time period of greatest concern will be in the hour or two immediately following the passage of the surface cold front associated with an expected surge in pressure and a shift in wind direction. The likely location of greatest concern for these possible damaging wind gusts will be along coastal sections from Virginia-to-Maine. Moderately chilly air will follow the early Friday frontal passage and then a reinforcing shot of cold arrives on Saturday supported by a strong wave aloft that can result in snow shower activity across the northeastern states.
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It looks like there will be a very active frontal passage in the Mid-Atlantic region and Northeast US from later Thursday night into early Friday. Temperatures will surge on Thursday ahead of the strong cold front and showers will become numerous by Thursday night. In fact, some of the rain can briefly fall on the heavy side later Thursday night into early Friday and there can be a thunderstorm or two mixed into the picture. Of more concern, however, is the likelihood for powerful winds from later Thursday night into early Friday and there can be potentially damaging wind gusts (i.e., power outages are on the table); especially, near and along the eastern seaboard from Virginia-to-Maine.
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After a mild start to the weekend, a pair of cold frontal passages ushered in much colder air to the Mid-Atlantic region that will stick around into Tuesday. Precipitation broke out late last night along the frontal boundary zone and changed to all snow before sunrise in the DC-to-Philly-to-NYC corridor as Arctic air filtered into the region. Snow will continue at varying rates for awhile longer today – likely into mid-day or early afternoon - aided in large part by a strong upper-level jet streak and mid-level frontogenesis. There can be additional accumulations of a couple of inches on untreated surfaces. Temperatures will hold in the low-to-mid 30’s and then drop into the teens during the overnight hours and they’ll remain well below-normal on Monday and Monday night. After a cold day on Tuesday and a milder Wednesday, very active weather will come to the area later Thursday and Thursday night possibly to include heavy rainfall and strong thunderstorms along with a dramatic, but brief spike in temperatures.
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The day started off quite mild in the Mid-Atlantic region, but the passage of a pair of cold frontal systems will bring about big changes in the overall temperature pattern for the next few days. Temperatures will likely peak by early afternoon and then drop slowly later this afternoon as an Arctic air mass begins to filter into the region following the passage of these two cold fronts. An upper-level trough of low pressure will then dig into the eastern US tonight and low pressure - aided by a strong jet streak aloft - will form along the Arctic frontal boundary zone. Precipitation will break out later tonight in the DC-to-Philly-to-NYC corridor and Sunday morning is quite likely to feature accumulating snow throughout the region which can last into the mid-day hours in most areas. Very cold conditions will follow on Sunday night, Monday, and Monday night with Valentine’s Day high temperatures generally confined to the 20’s - well below-normal for mid-February. The Arctic chill will disappear at mid-week and then it turns much milder on Thursday, but that warm up looks brief and it may be accompanied by some heavy rainfall with the arrival of the next strong cold front.
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It stays mild in the Mid-Atlantic region into the beginning of the weekend, but an Arctic front will slide through the area on Saturday and its passage will bring about much colder conditions for Sunday, Monday and Tuesday. Low pressure is going to form along the Arctic frontal boundary zone by tomorrow night and this system should generate accumulating snow in the Mid-Atlantic region from late Saturday night into Sunday likely on the order of a coating to a few inches in most spots. The core of the Arctic air mass will move overhead by Monday and temperatures on Valentine’s Day will be way below-normal for the middle of February. The Arctic chill wanes by mid-week and then signs point to a big time warm-up by late next week although it is likely to be accompanied by some rain by week’s end.
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