While the nation’s mid-section enjoys rarely ever-seen sustained warmth for Christmas week, the northeastern states will experience plenty of winter weather during the next 7 days or so. One system will bring some snow and ice to the northern Mid-Atlantic region and Northeast US from late tonight into Tuesday and though not a significant event, there can be some slippery spots tomorrow even in the big cities along the I-95 corridor from Philly-to-Boston. Another storm could threaten the Mid-Atlantic region and Northeast US with accumulating snow and significant ice at the end of the week with strong high pressure positioned over eastern Canada anchoring an Arctic air mass. By the end of the upcoming weekend, another low pressure will slide to the Great Lakes, and its training cold front will head to the east coast. This combination can produce rain, ice and snow across the northeastern states late in the weekend and it’ll be followed by another Arctic air outbreak for the first part of next week.
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A strong cold front will barrel through the region early Friday morning, and this system will bring us heavy rain, powerful winds, and maybe even a gusty thunderstorm. Winds will be strong ahead of the front from late tonight into early Friday, gusting up to 45 mph or so from a southwesterly direction, and then they’ll shift to northwesterly following the frontal passage. After a brief lull in the winds immediately surrounding the frontal passage, they’ll pick up markedly during the mid-day and afternoon hours...potentially gusting to 50+ mph. Temperatures will act in a topsy-turvy fashion during the next 24 hours in that they’ll rise into the 50’s later tonight in most areas and then drop sharply into the 30’s during the day on Friday on the heels of the frontal passage. Snow showers are very likely to develop on Friday across some of the higher elevation interior locations and one or two of these can make their way all the way into the I-95 corridor. The weather will settle down for the weekend with dry conditions expected on both days and a moderate chill in the air and another colder-than-normal air mass will arrive for the start of next week.
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A strong cold front will barrel through the Mid-Atlantic region on Friday morning and this system will be quite active with heavy rainfall and powerful winds from later tomorrow night into Friday. There is even the chance that a squall line of gusty thunderstorms forms right along the frontal boundary zone which could result in downpours and gusty winds right around the Friday AM commute in the I-95 corridor. After a mild start to the day on Friday, temperatures are likely to drop markedly during the mid-day and afternoon hours as the next colder-than-normal air mass pours into the Mid-Atlantic region. Snow showers will develop on Friday across some of the higher elevation interior locations and one or two of these can make their way into the I-95 corridor. The weather will settle down for the weekend with dry conditions expected on both days and a moderate chill in the air.
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The next big weather event in the Mid-Atlantic region will feature rain associated with a strong cold front and there can even be a thunderstorm in the mix before the frontal system clears the area. The rain can come down hard at times from late Thursday night into Friday morning and - given the current snow cover in much of the area – we’ll have to watch for the possibility of some localized flooding. The strong cold front will pass through the Mid-Atlantic region during Friday morning, and strong winds will develop on its backside from a northwesterly direction gusting to 40 mph or so...even higher wind gusts are likely across New England. In addition, temperatures are likely to drop markedly as the cold air mass pours into the region and snow showers are likely to develop; especially, in some of the higher elevation interior locations. The weather will settle down for the weekend with dry conditions expected on both days and a moderate chill in the air.
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The first widespread snow event for the DC-to-Philly-to-NYC corridor will take place from later tonight into Sunday morning and this snow event will be followed by bone-chilling cold and biting winds for the rest of Sunday, Sunday night, and Monday. Low pressure will quickly move today across the Plains, Midwest and Ohio Valley and will get a boost later tonight as it reaches the Mid-Atlantic region thanks to strong support in the upper atmosphere. A powerful jet streak will intensify overhead of the I-95 corridor later tonight enhancing upward motion in the area and the result will be an accumulating snowfall focused on the overnight hours and the early morning hours on Sunday. The precipitation could break out as a mixed bag this evening in some areas, but will change to all snow later tonight.
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The next in a series of Arctic air masses will begin to plunge into the north-central states later today and this one will be brutal...potentially the worst of the bunch since the cold pattern developed around Thanksgiving Day. Temperatures this weekend can drop to 20 degrees below zero in parts of the region from Montana to Wisconsin and wind chills can reach dangerously low levels. Meanwhile, yet another “clipper” system will begin to organize later today out across the north-central states and then push east-southeast on Saturday crossing over central Plains, Midwest and Ohio Valley. This system will reach the Mid-Atlantic region on Saturday night and will be supported aloft by a vigorous jet streak that will enhance upward motion in the area. The result will be accumulating snow from Saturday night into Sunday morning in the Mid-Atlantic region and this includes the DC-to-Philly-to-NYC corridor. Bitter cold and strong winds will follow for the rest of Sunday, Sunday night, and Monday.
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In the wake of yesterday’s “clipper” system, another Arctic air mass is pouring into the northeastern states on stiff NW winds and temperatures today will struggle to climb from early day levels. In addition, snow showers are likely in parts of the area and heavier snow squalls can develop causing travel headaches across some interior, higher elevation locations. Another “clipper” system will reach the Mid-Atlantic region on Friday, and it’ll gradually weaken during the day as it loses some of its upper-level support and this will limit its impact on the DC-to-Philly-to-NYC corridor.
By later tomorrow, the next Arctic air mass will plunge into the north-central US from Canada and this one will be brutal...potentially the worst of the bunch since the cold pattern developed around Thanksgiving Day. Temperatures this weekend can drop to 20 degrees below zero in parts of the region from Montana to Wisconsin and wind chills can reach dangerously low levels. Meanwhile, yet another “clipper” system will push east-southeast crossing over central Plains, Midwest and Ohio Valley on Saturday and then into the Mid-Atlantic region by Saturday night. This system will feature some strong support in the upper atmosphere with a vigorous jet streak and has the potential of producing accumulating snow in the Mid-Atlantic region from late Saturday into early Sunday. Arctic air that invades the north-central states on Friday and Saturday will then spread to the northeastern states on Sunday following the passage of this next “clipper” system.
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The next several days will feature multiple “clipper” low pressure systems across the northern US which are typically rather quick movers from northwest-to-southeast. One such system will track well to the north and west of the DC-to-Philly-to-NYC corridor later today bringing windy and slightly milder conditions to the I-95 corridor along with the threat of a few rain showers. A second “clipper” system will push towards the Mid-Atlantic region on Friday from the Ohio Valley. While this system may begin to weaken upon its approach, it can still produce some snow on Friday in parts of the Mid-Atlantic region including the DC metro and parts of Virginia (a hot spot so far this winter season for snowfall).
Over the weekend, yet another “clipper” system will push east-southeast towards the Mid-Atlantic region from the Ohio Valley, and this one will feature some strong support in the upper atmosphere with a vigorous jet streak. As a result, this is the most impressive to me of all of these “clipper” systems with the highest potential of producing accumulating snow in the Mid-Atlantic region (late Saturday into early Sunday). One final note, the Arctic blast that reaches the north-central US by early this weekend and then the Mid-Atlantic/Northeast US by early next week will feature some of the coldest air yet in this relentless cold weather pattern that began around Thanksgiving Day. Temperatures can drop to twenty degrees below zero by Sunday morning across a wide portion of the Upper Midwest from Minnesota-to-Iowa-to-Wisconsin.
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The cold pattern that has brought relentless cold in recent days from Alaska to the Mid-Atlantic region will continue for at least another week or so. The new work week begins with some frigid air in the eastern states and overnight lows in the DC-to-Philly-to-NYC corridor will drop to their lowest levels of the season so far. “Clipper” low pressure systems will swing cold fronts through the northeastern states during the next few days limiting any chance for a sustained warmup. One “clipper” can bring rain, ice and/or snow to the Mid-Atlantic/Northeast US at mid-week and a second system can bring a touch of snow in the late week. Over the weekend, low pressure may ride along the Arctic boundary zone, and this system could bring some accumulating snow to the Mid-Atlantic region to go along with the well below-normal temperatures that should last into the early part of next week.
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The 2025 hurricane season is winding down across the Northern Hemisphere, and it has been the second straight season with below-normal activity as measured by the metric known as the “Accumulated Cyclone Energy (ACE)”. The most important region when it comes to tropical activity in the Northern Hemisphere is the western half of the Pacific Ocean as it features the highest ACE value of any sector from a climatological point-of view and it was well below-normal for the 2025 tropical season. In the Atlantic Basin, tropical activity ended up slightly above the normal in terms of ACE thanks in large part to the end-of-season blockbuster hurricane named “Melissa” which reached category 5 status and lasted for a lengthy period. However, there were no landfalling hurricanes in the US for the first time since 2015, and the number of hurricanes (5) was below the long-term average of 7.2.
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