An Arctic invasion with a Siberian connection will get underway by the early part of the weekend 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. Temperatures are going to fall to well below-normal levels across much of the nation for the bulk of next week which is quite impressive indeed considering this is right around the time of year with the lowest “normal” temperatures.
The Arctic front at the leading edge of the cold air outbreak will reach the eastern states on Sunday and a wave of low pressure is likely to form right along its boundary zone. This Arctic wave could produce some accumulating snow in the Mid-Atlantic region from later Sunday into Sunday night. Another storm system could develop way down in the Gulf region by the middle of next week potentially bringing snow and ice to parts of the southern and eastern US. Looking ahead, there is even the chance for a third system to form across the southern states by the end of next week.
One final note, even before we get to the interesting weather of this weekend and next week, there can be some snow in the near-term across the Great Lakes, Mid-Atlantic, and Northeast US.
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Upper-level ridging and surface high pressure will build over the region later this week and it’ll help to promote a warm-up that can result in temperatures well up in the 50’s by week’s end. Changes will begin to take place this weekend, however, as a strong upper-level trough forms over the central states. As such, colder air will make a return to the Tennessee Valley region and we’ll likely be confined to the 20’s for highs by early next week as Arctic air overspreads much of the nation.
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Widespread bitter cold air looks like it will overspread the nation next week and there can be multiple storm threats as well. Temperatures are likely to fall to well below-normal levels across much of the nation which is quite impressive considering the 3rd week of January is - from a climatological point-of-view - the coldest week of the year in many areas. An Arctic front is going to head into the eastern states later in the weekend and it will be at the leading edge of this incoming Arctic air mass...some of which may have its origins on the Siberian side of the North Pole. A wave of low pressure may form along the Arctic frontal boundary zone early next week potentially producing some snow in the Mid-Atlantic region for the period from late Sunday into Monday (Inauguration Day). Another storm threat could come at mid-week with its origins way down south and perhaps there will even be a third one during the late week time period.
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This will be a relatively quiet week across the nation despite another Arctic blast that arrives tonight in the eastern states, but next week looks like a different story. Widespread bitter cold air looks like it will overspread the nation next week and there can be multiple storm threats as well. Temperatures are likely to fall to far below-normal levels across much of the nation in what is from a climatological point-of-view, already the coldest week of the year in many areas.
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The week starts off moderately chilly with temperatures approaching the 40 degree mark for afternoon highs. However, another Arctic blast makes its way into the eastern US by tomorrow and temperatures will drop back down to well below-normal levels for the Tennessee Valley through the mid-week. It turns milder by week’s end and there will be an increasing chance of rain showers.
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Very cold air penetrated all the way down to the Gulf coast region during the past couple of days and it set the stage for significant snow and ice across much of the southern US including right here in the Huntsville metro region. Low pressure will head slowly to the east-to-northeast on Friday over the northern Gulf states bringing snow and ice here with several inches on the table (3-6”). This system will push to the east-northeast of here by Friday night ushering in a reinforcing cold air mass into the Tennessee Valley region for the upcoming weekend.
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This cold and active weather pattern will result in another storm system in the short-term and this one will have a major impact on the southern states from New Mexico to the Carolinas with significant snow and disruptive ice. Low pressure will begin to organize over the Texas Gulf coast later today which is much farther to the south compared to the storm system earlier this week that originated over the central Plains. Cold air has penetrated all the way down to the Gulf coast setting the stage for this potentially crippling winter weather event in many southern locations.
This low pressure will push slowly to the east-northeast on Friday from the Deep South to the coastal waters of North Carolina by early Saturday and then continue on a track to the east-northeast of there into the open waters of the western Atlantic. While support in the upper atmosphere will be somewhat limited for the surface low pressure system, accumulating snow is likely to overspread the DC-to-Philly-to-NYC corridor on Friday night and continue into Saturday morning with a coating to as much as 2-3 inches possible in some areas.
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Very cold air has penetrated way down into the Gulf coastal region and it is going to set the stage for significant snow and ice across the southern US during the next 24 hours or so including right here in the Huntsville metro region. Low pressure will intensify over the Texas Gulf coast by early tonight and will head slowly to the east-to-northeast on Friday bringing snow here from later tonight into Friday and it can become mixed with sleet and/or freezing rain at times. The snow can be heavy at times for awhile by early morning and several inches of snow and ice accumulations are on the table (3-6 inches). This system will push to the east-northeast of here by Friday night ushering in a reinforcing cold air mass for the Tennessee Valley region for the upcoming weekend.
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This cold and active weather pattern will produce another storm system in the short-term and this one will have a major impact on the southern states from Texas to the Carolinas with significant snow and disruptive ice. Low pressure will organize over the northwestern Gulf of Mexico later today which is much farther to the south compared to the most recent storm system that originated over the central Plains. Cold air has penetrated all the way into the Deep South during the past couple of days setting the stage for this upcoming winter event.
This storm system will push to the northeast on Friday from the Deep South to the coastal waters of the southern Mid-Atlantic by mid-day on Saturday. The surface low will have little support in the upper atmosphere as a “positively-tilted” trough axis will be limited in its generation of upward motion. While snow is likely in the Mid-Atlantic region from late Friday night into early Saturday, it is likely to be an overall light event with accumulations probably limited to the range of a coating to a couple of inches.
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Very cold air has penetrated way down into the Deep South and it is going to set the stage for significant snow and ice across the southern US during the next couple of days. Low pressure is likely to form over the northwestern Gulf of Mexico later tomorrow and head slowly to the northeast bringing snow here from late tomorrow night through the morning hours on Friday. The snow can be heavy at times by Friday morning and it can mix with rain…several inches of snow accumulation are on the table (preliminary estimates of 3-6 inches). This system will push to the northeast of here by the early weekend ushering in a reinforcing cold air mass for the Tennessee Valley region.
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