An upper-level disturbance is helping to generate surface low pressure in the southeastern states at mid-day and this system will intensify over the next 24 hours as it moves rather quickly to the northeast - likely reaching the waters off of eastern Maine by mid-day on Friday. Accumulating snow will spread across the DC-to-Philly-to-NYC corridor later tonight and it’ll wind down on Friday morning from southwest-to-northeast. There are likely to be small-scale heavier snow bands that develop later tonight/early Friday associated with mid-level “frontogenetic forcing” and these will produce localized higher accumulation amounts. It’ll be quite cold during and after the storm and another very impressive cold air blast will arrive in the Mid-Atlantic/Northeast US early next week.
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An upper-level disturbance will help to develop low pressure today in the southeastern states and this system will intensify as it moves fairly quickly to the northeast reaching the waters off of eastern Maine by mid-day Friday. Accumulating snow will spread across the region later this evening and it should be over by dawn on Friday likely with accumulation totals of 2-4 inches although isolated higher amounts are possible; especially, in the eastern half of the metro region. Temperatures will drop well down into the teens on Friday night in the wake of the low pressure system and it’ll stay quite cold on Saturday. A brief warm up into the 40’s on Sunday afternoon will be followed by another impressive cold shot early next week following the passage of another cold frontal system.
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Today will turn a little bit milder in the Mid-Atlantic region as low-level winds increase in intensity from a southwesterly direction ahead of the next cold frontal system. That cold front will shift to our east later tonight and its passage will usher in another cold air mass for the latter part of the week. On Thursday, an upper-level disturbance will help to spawn the formation of low pressure in the southeastern states and this system will intensify as it moves fairly quickly to the northeast reaching the waters off of Maine by mid-day Friday. Some accumulating snow will spread across the DC-to-Philly-to-NYC corridor on Thursday night and it’ll likely come to a quick end early Friday resulting in a moderate snowfall for the region. Temperatures are likely to drop to the teens on Friday night all along the I-95 corridor in the wake of the low pressure system and another cold air blast will arrive early next week into the Mid-Atlantic region.
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High pressure will shift off the coast today and this will allow for somewhat milder air to push into the Mid-Atlantic region from the Ohio Valley. Initially, this action may produce a touch of freezing rain as low-level temperatures hover near freezing early in the day, but temperatures should climb into the 40’s this afternoon aided by an increasingly strong southwesterly wind. A cold front will pass through the region in the overnight hours paving the way for a colder air mass for the late week. The next threat of accumulating snow for the Mid-Atlantic region comes on Thursday night and early Friday as low pressure pushes to near the Mid-Atlantic coastline. At this time, the late week event looks like a moderate snowfall - perhaps on the order of 2-4 inches - as the low pressure system will be moving along at a pretty good clip. Perhaps a bigger story is the cold that will likely accompany and follow this late week event and then another cold blast is destined to arrive early next week. The blast early next week could turn out be a doozy with “single-digit” type cold…get ready for those heating bills.
One final bit of information on Monday’s snowstorm…6.9 inches was officially recorded at Reagan National Airport (DCA). It was more snow there than the last two winters combined, the most in one day in about 3 years, and the 3rd biggest “first snow” on record.
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The month of January got off to a very mild start in the Mid-Atlantic region this past weekend, but a strong cold frontal passage on Sunday night changed that around quite dramatically by Monday. In addition to the influx of the cold air mass, significant snow fell across parts of the region from the DC metro area to the Delmarva Peninsula to the Jersey Shore, but there was a sharp cutoff on the northern fringes with little or no snow at all in the Philly and NYC metro regions. The next threat of accumulating snow for the Mid-Atlantic region comes on Thursday night and early Friday as low pressure pushes to near the Mid-Atlantic coastline. Perhaps a bigger story, however, is the cold that appears to be on the way. An impressive cold shot will likely accompany and follow this late week system into the Mid-Atlantic region and then another cold blast is destined to arrive early next week. The blast early next week could turn out be a doozy with “single-digit” type cold…get ready for those heating bills.
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On the heels of yesterday’s significant snowfall, high pressure will take control of the weather from today into tomorrow and, after a cold day on Tuesday, it’ll turn a bit milder on Wednesday as the high shifts off the east coast. A word of caution…as the milder air first tries to push in early on Wednesday, there can be a touch of freezing drizzle. A cold front comes through the region on Wednesday night and it’ll usher in another cold air mass for the latter part of the week. Another strong disturbance in the upper atmosphere will head in this direction later Thursday and it is likely to result in the formation of low pressure near the Mid-Atlantic coastline by Thursday night and Friday. This system certainly has the potential to produce more accumulating snow around here on Thursday night and early Friday and will be monitored closely during the next couple of days.
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A new week, a new month, a new year, and a new weather pattern for the eastern US as winter has finally arrived. A significant snowfall continues at this hour in the region from DC-to-the-Delmarva Peninsula-to-southern New Jersey and the snow will wind down later this afternoon from west-to-east. Some snow is now being reported at Philly Airport, but for the most part, today’s storm will bypass the Philly and NYC metro regions as it slides just to their south and east. In addition to very poor road conditions in the hard hit areas, power outages have become an increasing problem given the strong winds and heavy, wet snowfall. Another threat for accumulating snow is likely to come in the Thursday night/early Friday time period and that threat could be for a more widespread part of the Mid-Atlantic region and Northeast US.
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A new month, a new year, and a new weather pattern that has resulted in overnight snow in parts of the Mid-Atlantic region and it’ll be a cold, snowy start to the week here with temperatures confined to the 30’s following an unusually mild weekend. The snow can fall heavily at times this morning and mid-day with accumulations of 3-6 inches likely in the far north/west suburbs and 6-10 inches is on the table in the District and surrounding areas. Low pressure will push away from the Mid-Atlantic coastline later this morning and high pressure will take control of the weather for tonight and Tuesday. It’ll turn milder for a brief time at mid-week as high pressure pushes off the coast, but another cold front will usher in colder air for the late week time period. By Thursday night and Friday, we’ll have to watch as low pressure tries to intensify near the Mid-Atlantic coastline and it could produce some accumulating snow in the region.
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The month of December ended with well above normal temperatures throughout the Mid-Atlantic region and the big cities of DC, Philly and NYC had no measurable snow. The new month and new year has coincided with a pattern change in the atmosphere that will bring winter weather to the eastern states including the strong likelihood for significant accumulating snow in parts of the Mid-Atlantic region with a focus on the zone from DC-to-Delmarva-to-southern New Jersey. A second winter storm is possible late this week that could result in more accumulating snow for the Mid-Atlantic region on Thursday night and Friday.
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Low pressure will track nearby today along a nearly stationary frontal boundary zone bringing us more clouds and perhaps a touch of rain and fog at times. Weak high pressure will try to bring some drying on Friday, but more rain will follow later Friday night and Saturday from strong low pressure that will push to our northwest. In addition to the rain on Saturday, New Year’s Day, it’ll be unseasonably warm for the 1st day of January and afternoon highs could be in the mid-to-upper 60’s. After another mild and damp day on Sunday, sharply colder air will push into the region by Monday following the passage of a strong cold frontal system. This cold blast may arrive with a low pressure system on Sunday night and Monday which could produce some snow in the Mid-Atlantic region…something to monitor in coming days.
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