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 beneficial rainfall to the region from late today into 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 or sleet can mix in at times in some of the far 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 in the month of November and this 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 tomorrow into tomorrow night with the highest totals likely along and south of the PA/MD border. The air mass in place, as the precipitation arrives later tomorrow will be quite chilly and there can be some snowflakes mixed in at times; primarily, in those areas north of the PA/MD border.
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The new week starts off with high pressure in place and then a weak low pressure system will push just to the south of here later 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 on Tuesday as the low pressure system approaches and there can be some rain by late in the day lasting into Tuesday evening and a few snowflakes can be mixed in across the far northern suburbs. 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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Arctic air continues to impact the eastern states here at mid-week and today will feature colder-than-normal temperatures around here along with a continued stiff westerly wind making it feel even colder than the actual air temperature. A cold front passes through the area overnight and it’ll usher in a chilly air mass for the remainder of the week with temperatures remaining below-normal Thursday, Friday, and Saturday.
In terms of space weather, a very active sunspot region unleashed three separate solar flares on Sunday, Monday, and Tuesday and each one resulted in a coronal mass ejection (CME) headed towards Earth (full story). The combination of the first two CMEs impacted the Earth last night with auroras seen around here in the Mid-Atlantic region and in unusually far south locations such as Texas, Alabama, and New Mexico. The third CME that was unleashed early Tuesday morning - the strongest solar flare of the year - could result in more northern lights on Wednesday night so be on the lookout for that if skies cooperate (and they should).
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The Arctic blast that reached the eastern US on Monday is having an impact this morning all the way down to southern Florida with numerous low temperature records across the southeastern states and Tennessee Valley region. In addition to the unusual cold in our area, winds will be quite strong today gusting to 40 mph or so which will make it feel even colder than the actual air temperatures. Temperatures do relax some at mid-week, but a chilly air mass moves in later this week following the passage of another cold frontal system.
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An Arctic air mass that originated near the North Pole has infiltrated the eastern states today and it will have an impact all the way down to southern Florida by Tuesday morning. In fact, temperatures on Tuesday morning are likely to bottom out in the 30’s across the central part of the Sunshine State and the 40’s in southern Florida. At the same time, many suburban locations along the Mid-Atlantic’s I-95 corridor region from DC-to-Philly-to-NYC will feature the first hard freeze of the season with overnight lows well down in the 20’s in many spots. There is accumulating snow to go along with this early week Arctic blast with favored areas including the Great Lakes, interior sections of the Mid-Atlantic and Northeast US, and the central Appalachians where a vigorous upper-level low is helping to destabilize the atmosphere in a big way.
While there will likely continue to be colder-than-normal temperatures across the northeastern states during the second half of the week, this winter-like pattern does not look like it’ll continue through November. In fact, there are signs for warmer-than-normal conditions to cover much of the nation from next week into the following week and it may include one or more severe weather outbreaks as well. Looking farther down the road, numerous signals point to a sustained colder-than-normal period to start the winter season as we transition into the month of December.
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An Arctic cold front passed through the region last night and the coldest air of the season pushes into the eastern US for the next couple of days. Temperatures will likely hold in the upper 40’s this afternoon for highs and then drop to the upper 20’s later tonight for overnight lows….the first hard freeze of the season in many spots. It remains unseasonably cold on Tuesday and a tight pressure gradient will result in stiff winds around here making it feel even colder than the actual air temperature. While temperatures relax at mid-week, another cold front will usher in a chilly air mass for the latter part of the week with below-normal conditions remaining on Thursday, Friday, and Saturday.
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A cold front crosses the region later tonight and it will bring some shower activity to the DC-to-Philly-to-NYC corridor. Temperatures behind the cold frontal passage will not drop with highs on both days likely in the 60’s with some sun and Saturday and clouds on Sunday with the chance for rain. An Arctic cold front arrives on Sunday night and it’ll usher in the coldest air yet this season for the early part of next week and many areas will experience their first hard freeze on Monday night. The atmosphere will be quite unstable by later Monday with a vigorous low pressure system nearby in the upper part of the atmosphere. This setup could lead to some snow shower activity around here late Monday and accumulating snow is likely just downstream from the Great Lakes (e.g., western PA, western NY) and also in the higher elevations of the western Mid-Atlantic (e.g., western MD, western VA, West Virginia). Temperatures relax by mid-week, but there will be a shot of chilly air by late next week.
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