Low pressure over the southeastern US early this morning will intensify as it pushes northeastward to a position off the Mid-Atlantic coastline by early this evening and then to near the New England coast by later tonight. Snow or rain changing to snow will break out today across the DC-to-Philly-to-NYC corridor and several inches is possible by the time the system winds down later this evening. Bitter cold air will follow the snow for much of the week ahead with single digit overnight lows on the table and some spots may even touch the zero-degree mark. A mid-week winter storm will have a southern US focus likely producing accumulating snow and/or ice from Texas-to-northern Florida-to-the Carolina coastline…likely staying to the south and east of the Mid-Atlantic region. A third storm system may ride up the east coast by the end of the week with some snow possible in the Mid-Atlantic region in the late Thursday/early Friday time period.
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The next several days will feature the worst that winter has to offer across the nation with widespread brutal cold and multiple snow and ice threats. An Arctic invasion with a Siberian connection will get underway by Saturday as bitter cold air from Canada plunges southward through the central states. By Sunday, the Arctic air mass will spread eastward towards the Atlantic seaboard and by the time we get to Monday, Inauguration Day, most of the country will be in a deep freeze including the DC metro where outdoor activities are planned for the swearing-in ceremonies. In fact, the first couple of days of next week could be among the coldest seen across the nation in a long time as there will be bitter cold conditions extending virtually from coast-to-coast.
This cold weather pattern will come with as many as three threats of snow and ice during the next week to ten days. On Sunday, low pressure will form along the incoming Arctic frontal boundary zone and likely produce several inches of snow across the Mid-Atlantic region and Northeast US - and this includes in the big cities along the I-95 corridor from DC-to-Boston. Another storm is destined to form over the Gulf region by mid-week and its focus could be on the southern states with significant snow and ice a possibility from Texas to the Carolinas…the snow shield can potentially work its way into the Mid-Atlantic region. Yet another system can again develop way down in the southern states by the end of next week or during the subsequent weekend.
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The next several days will feature the worst that winter has to offer across the nation with widespread brutal cold and multiple snow and ice threats. An Arctic invasion with a Siberian connection will get underway by Saturday as bitter cold air from Canada plunges southward through the central states. By Sunday, the Arctic air mass will spread eastward towards the Atlantic seaboard and by the time we get to Monday, Inauguration Day, most of the country will be in a deep freeze including the DC metro where outdoor activities are planned for the swearing-in ceremonies. In fact, the first couple of days of next week could be among the coldest seen across the nation in a long, long time as there will be bitter cold conditions extending virtually from coast-to-coast.
This cold weather pattern will come with as many as three threats of snow and ice during the next week to ten days. On Sunday, low pressure will form along the incoming Arctic frontal boundary zone and likely produce several inches of snow across the Mid-Atlantic region and Northeast US - and this includes in the big cities along the I-95 corridor. Another storm is destined to form over the Gulf region by mid-week and its focus could be on the southern states with significant snow and ice a possibility down there. Yet another system can again develop way down in the southern states by the end of the next week or during the subsequent weekend.
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The next several days will feature the worst that winter has to offer with widespread brutal cold and multiple snow and ice threats. An Arctic invasion with a Siberian connection will get underway by Saturday as bitter cold air from Canada plunges southward through the central states. By Sunday, the Arctic air mass will spread eastward towards the Atlantic seaboard and by the time we get to Monday, Inauguration Day, most of the country will be in a deep freeze including the DC metro where outdoor activities are planned for the swearing-in ceremonies. In fact, the first couple of days of next week could be among the coldest seen across the nation in a long, long time as there will be bitter cold conditions extending virtually from coast-to-coast.
This Arctic invasion will come with multiple snow and ice threats including one later Sunday into Sunday night in the Mid-Atlantic/Northeast US with several inches on the table, and another one at mid-week which could have a focus on the southern US. And, in the very short-term, snow is already falling today across the Great Lakes region with accumulations expected there on the order of a few inches, and occasional snow is likely to make its way into the DC-to-Philly-NYC corridor for the afternoon and early evening hours with accumulations possible of a coating to an inch or two.
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A much colder-than-normal weather pattern is about to commence for the central and eastern US and it looks like it’ll be one with some staying power. In fact, this upcoming cold stretch for much of the nation may feature some extreme cold and very cold conditions may penetrate all the way into the southern states from Texas-to-Florida. In addition, there are likely to be multiple snow threats in this developing weather pattern that can impact much of the central and eastern US to go along with the expected much colder-than-normal temperatures. Next week looks particularly interesting in a period that may feature some extremely cold air and multiple threats of snow including one in the Sunday/Monday/Tuesday time frame for the Midwest and at least portions of the Mid-Atlantic. Numerous teleconnection indices support the notion of a much colder-than-normal weather pattern, and an unfolding stratospheric warming event enhances the idea that the much colder-than-normal temperature pattern can be sustained well into the month of January.
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A much colder-than-normal weather pattern will set up for the central and eastern US during early January and it looks like it’ll be one with some staying power. In fact, this upcoming cold stretch for much of the nation may feature some extreme cold and very cold conditions may penetrate all the way into the Deep South from Texas-to-Florida. In addition, there are likely to be multiple snow threats in this developing weather pattern that can impact much of the central and eastern US to go along with the expected much colder-than-normal temperatures. Next week (1/5 to 1/12) looks particularly interesting in a period that may feature multiple snow and ice threats and potentially some extremely cold air. Numerous teleconnection indices support the notion of a much colder-than-normal weather pattern, and an unfolding stratospheric warming event enhances the idea that the much colder-than-normal temperature pattern can be sustained well into the month of January.
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Low pressure will move in a general “west-to-east” fashion across southern Canada during the next 48 hours and it will strengthen dramatically by the time it reaches the Canadian Maritime Provinces on Friday morning. This intensifying storm system and its associated strong cold front will have a big impact on the Great Lakes, Mid-Atlantic and Northeast US between later today and Friday to include some accumulating snow, possible snow squalls, powerful and potentially damaging wind gusts of 50 mph or so, and the ushering in of another Arctic air mass which will produce the lowest wind chills of the season so far.
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One of the biggest weather stories going forward is the cold wave that is coming to much of the nation beginning late this week and likely continuing for much of the first couple weeks of December. In fact, this will likely be one of the coldest starts to the month of December in many years and it will have a “Siberian” connection.
Before we get to the cold wave, there will be a lot of weather to go through across much of the nation with significant snowfall in some areas. Low pressure is currently pushing eastward across the higher elevations of the western US resulting in substantial snow accumulations from the Sierra Nevada Mountains of eastern California to the Colorado Rockies. Some of these locations will end up with snow totals on the order of 1-2 feet before this low spills out into the middle of the nation at mid-week.
From there, this low pressure system will move rather quickly across the Tennessee Valley on Wednesday night and to the southern New England coastline by mid-day Thursday. As a result, rain is likely to reach the DC-to-Philly-to-NYC corridor by late Wednesday night and continue into Thursday (Thanksgiving Day). Farther to the north, accumulating snow is likely to fall from early Thursday into early Friday across interior, higher elevation locations of northern PA, upstate NY and interior New England with several inches on the table.
Following the departure of the low pressure system to the western Atlantic, a northwesterly flow of air will develop across the northeastern quadrant of the nation bringing much colder-than-normal air from Canada into the Great Lakes, Mid-Atlantic, and Northeast US. The “Great Lakes snow machine” will get turned on with the much colder-than-normal air flowing over the still relatively warm waters of the Great Lakes from later Friday into Saturday and there is likely to be much more in the way of “lake-effect” snow activity during this upcoming cold wave.
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A strong cold front passed through in the overnight hours with a band of heavy rainfall and gusty winds and colder air has followed into the Mid-Atlantic region. Surface low pressure has formed along the northern Mid-Atlantic coastline, and instead of pushing to the north, it will be “forced” to rotate around as it becomes increasingly influenced by strong blocking high pressure to the north. As such, an area of moisture now over the northern Mid-Atlantic will loop back around and impact the entire region by later tonight and through the day on Friday.
As the atmosphere turns colder, the precipitation will mix with snow and/or ice pellets by later tonight in the DC-to-Philly-to-NYC corridor and then likely to all snow for awhile on Friday in much of the area. In fact, small accumulations are possible on Friday across many of the northern and western suburbs along the I-95 corridor. Significant snowfall of at least 6-12 inches is coming to much of the Appalachian Mountain chain including in the region from West Virginia to the Laurel Highlands of southwestern PA, and from the Poconos in northeastern PA to the Catskills and Adirondacks of upstate NY.
Looking ahead, there are signs for multiple cold air outbreaks to make their way from northern Canada into the central and eastern US as we push through the remainder of November and into the early part of December...quite a wintry look to the unfolding weather pattern that will include additional threats of snow for the Mid-Atlantic/Northeast US.
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If you are a skier in the northeastern part of the country then this upcoming storm system will be quite good news as early season significant accumulating snow is likely in much of the Appalachian Mountain chain including in the region from West Virginia to the Laurel Highlands of southwestern PA and from the Poconos in northeastern PA to the Catskills and Adirondacks of upstate NY. In fact, snow is quite possible during this event all the way into the I-95 corridor and small accumulations are possible on Friday in some of the northern and western suburbs; especially, to the north of the PA/MD border.
A deepening trough of low pressure in the upper atmosphere will slide south and east to a position over the Mid-Atlantic by tomorrow night and this will help to spawn a (secondary) low pressure system near the northern Mid-Atlantic coastline. This system will become a slow-mover thanks to intense blocking high pressure to the north that will be parked over northeastern Canada. In addition to the threat for the first snows of the season, the northeastern states will experience very beneficial rainfall on the storm’s front end as a cold front pushes through from late today into early Thursday…and that won’t be the end of the precipitation.
Looking ahead, there are signs for multiple cold air outbreaks to make their way from northern Canada into the central and eastern US as we push through the remainder of November and into the early part of December.. It is quite a wintry look to this unfolding weather pattern that will include additional snow threats…perhaps one late next week right around Thanksgiving Day.
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