A hazardous and dangerous winter event is now underway in the Tennessee Valley with several rounds of precipitation by early tomorrow. Freezing rain is likely throughout the day today with a significant buildup of ice and there will be a wintry mix tonight of snow, sleet and/or freezing rain. As a result of the expected significant icing, power outages are on the table and travel conditions will be extremely difficult. Slow improvement in the weather begins at mid-week across the region.
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Arctic air has gripped much of the northern and central US in recent days and it is plunging later this weekend to Texas and Oklahoma where the cold may be historic with all-time low temperature records likely being challenged in some spots. The longevity of this on-going cold wave across the northern and central US has been rather amazing with many areas experiencing bitter cold conditions for numerous days. In addition to the widespread and extreme cold, significant snow has accumulated in some regions including the Pacific Northwest (e.g., Seattle, Portland) and it is now moving into the Rocky Mountain States. Later in the weekend, this snow will spread into the far southern states of New Mexico, Oklahoma and Texas and ice will become a problem all the way down to the Gulf coast of Texas. Ice has already become a major headache today across parts of the Mid-Atlantic region including the DC metro region where several accidents have been reported and a significant ice buildup is underway. Unfortunately, a change in the upper part of the atmosphere will likely result in additional icing events in coming days across much of the nation.
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The warmer air from earlier this week in the Tennessee Valley has given up its ground as Arctic air pushes to the south from the Northern Plains to the southern states. High temperatures for the next few days are going to be in the 40’s and then perhaps confined to the 30’s by early next week. The overall pattern will be quite unsettled with the chance of rain and/or snow showers and even some icing is on the table as we get into early next week.
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The Arctic air that has been holding its ground to our north this week is making a move to the south and we’ll turn cooler today and even colder by the latter part of the weekend. The cold to the north is associated with a deep upper-level low over the northern US and southern Canada and warmer air to the southeast of here is associated with an expanding ridge of high pressure. High temperatures this weekend are likely to be in the 40’s on Saturday and then confined to the 30’s by Sunday afternoon.
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The next ten days will bring the worst that winter has to offer too much of the nation which will include accumulating snow, significant icing and persistent cold that will be extreme in some areas. The energetic pattern of recent days will continue with storm-after-storm impacting the nation from coast-to-coast in this next ten day time period. Perhaps the best example of the most extreme winter weather that is on the way will take place deep in the heart of Texas where temperatures could drop to near zero by early next week and snow and ice can accumulate all the way down into the southeastern part of the state.
In the Mid-Atlantic region, one system will bring accumulating snow to areas near and to the north of the PA/MD border from tonight into early Thursday and it’ll produce a mixed bag of snow, sleet and rain in the DC metro region. A second and relatively weak system will have little or no impact on areas to the north of the PA/MD border on Thursday night and early Friday, but it can produce a small amount of snow in the DC metro region. A stronger system set to arrive this weekend will have more moisture to deal with than these first two and it could result in more significant ice and/or snow in the Mid-Atlantic region. And yes, there may be two other storms to deal with in the Mid-Atlantic region next week with significant snow and/or ice on the table for either or both of these systems.
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A battle in the atmosphere continues this week with Arctic air to the north and west and a warmer air mass to our south and southeast. The Arctic air to the north is associated with a deep upper-level low over the northern US and southern Canada and the warmth to the southeast of here is associated with an expanding ridge of high pressure. Milder air wins out it in the Tennessee Valley for the next couple of days, but it turns much colder by the latter stages of the upcoming weekend.
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A battle in the atmosphere will take place this week with Arctic air to the north and a warmer air mass to our south and southeast. The Arctic air to the north is associated with a deep upper-level low over the northern US and southern Canada and the warmth to the southeast of here is associated with a ridge of high pressure. Milder air wins out it appears for the Tennessee Valley for the next couple of days, but then it turns noticeably colder this weekend.
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A battle in the atmosphere will take place this week with Arctic air to our north and a warmer air mass to our south and southeast. After a chilly end to the weekend, it’ll turn out milder today and temperatures should climb all the way into the upper 50’s. It should be rain-free as we begin the new week, but the chance of showers will increase on Tuesday as a system to our west slides into the Tennessee Valley. Much colder weather is likely to arrive by week’s end in the Tennessee Valley following the passage of a strong cold front.
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Moderate cold air will follow the passage of a cold front for the upcoming weekend and attention will turn to the Gulf of Mexico and the southeastern states where a lot of moisture will be gathering. A storm will develop near the South Carolina coastline by early Saturday night and move to a position off the New Jersey coastline by mid-day Sunday. This system is likely to bring another round of accumulating snow to the DC-to-Philly-to-NYC corridor from later Saturday night into Sunday morning with several inches on the table. Looking ahead, very cold air will pour into the interior Northwest, Northern Plains, Upper Midwest and Great Lakes next week and the overall active weather pattern will bring additional snow threats to the Mid-Atlantic region.
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A chilly air mass has moved into the region as we close out the work week and despite plenty of sunshine, it’ll be a struggle to make it to the 50 degree mark for afternoon highs. It’ll turn a bit milder this weekend, but a disturbance dropping into the Arklatex region will bring back the chance of showers of rain on Saturday and rain and/or snow showers on Saturday night. It does look milder early next week as zonal flow takes over in the upper part of the atmosphere. The overall pattern turns colder again by mid-week and it could be a period of sustained below-normal conditions for the Tennessee Valley
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