A long duration winter weather event is underway in the Mid-Atlantic region with a cold “plain” rain south of the PA/MD border, freezing rain and sleet across southeast and east-central PA, and snow is a factor in northeastern PA, interior upstate NJ and in the NYC metro region. As colder air wraps around a very slowly moving and intensifying low pressure system later tonight, accumulating snow will become an increasingly important factor for most areas and accumulations are likely; especially, north of the PA/MD border. In fact, there is the chance that some spots in the Mid-Atlantic region experience significant snowfall amounts on Monday and Monday night as intense mesoscale heavy snow bands are likely to form during this event.
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The major storm that slammed into the west coast a few days ago will result in a long duration winter weather event for the Mid-Atlantic region from late tonight into Monday night. This system is now generating blizzard conditions across the Dakotas and heavy snow will extend into the Upper Midwest later today and tonight. The upper-level feature associated with this storm has made its farthest push to the north into South Dakota and it will now be forced to shift to the east-southeast by an “atmospheric roadblock” in the form of upper-level high pressure ridging over southern Canada. The end result will be a cold air mass stuck in place in the lowest levels of the Mid-Atlantic region when precipitation arrives late tonight/early Sunday and this will lead to a period of sleet and/or freezing rain at the onset of this long duration event in much of the DC-to-Philly-to-NYC corridor. A change to plain rain is likely in many areas along the immediate I-95 corridor later tomorrow and there even be a slackening off of the precipitation early tomorrow night. Late tomorrow night and during the day on Monday, colder air will wrap around into intensifying low pressure off the Mid-Atlantic coastline and this will result in a changeover to snow in most areas and significant snow accumulations are possible; primarily, north of the PA/MD border.
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The major storm that slammed into the west coast a couple of days ago will result in a long duration winter weather event for the Mid-Atlantic region from later this weekend into early next week. This system now over the interior western US will head northeast towards the Northern Plains over the next day or so and will generate significant snow this weekend from the Northern Rockies to the Upper Midwest. It is at this point in time that this system will run into an “atmospheric roadblock” in the form of upper-level high pressure ridging over southern Canada and switch from a northeasterly direction to east-southeast. The end result will be a cold air mass in place in the Mid-Atlantic region when precipitation arrives later Saturday night and low pressure is likely to spin just off the coastline as late as late in the day on Monday. This long lasting winter weather event could feature some ice and/or snow accumulations at the front end for much of the Mid-Atlantic region – perhaps plain rain for awhile in the middle – and then potentially significant accumulating snow on the back end.
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One strong storm is producing heavy snowfall across the Upper Midwest today and it’ll generate some very strong winds later today into Thursday in a large section of the country extending from the Great Lakes/Ohio Valley to the Mid-Atlantic/NE US. Another powerful storm continues to wreak havoc across much of the western third of the nation with heavy coastal rain and significant inland snows. This second system will push to the northeast over the next couple of days, but once it reaches the Dakotas, it’ll run into an “atmospheric roadblock” and be “forced” to slide southeast towards the Mid-Atlantic/NE US coastline by later this weekend into early next week. The result of this storm track will allow for cold air to be in place in the Mid-Atlantic/NE US when the storm arrives later this weekend and this raises the chance for snow and ice. The threat for snow and ice will continue into Monday for this part of the nation as the surface low spins around just off the coastline of the Mid-Atlantic/NE US.
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One major storm is bringing heavy snowfall to the Upper Midwest today and another major storm is impacting the western US with coastal rains and inland snows. The first storm will push quickly in an eastward direction and end up near coastal Maine by tomorrow morning. This system will drag a cold front through our area this evening and it'll become increasingly windy during the day with a few showers. Those winds will intensify tonight and Thursday following the frontal passage and can gust past 40 mph at times. The second major storm will head northeastward towards the Dakotas later in the week and then run into an “atmospheric roadblock” and be forced to take a turn to the southeast this weekend and head right towards the Mid-Atlantic coastline. Precipitation from this second system will probably arrive here on Saturday night and it is likely to be cold enough for ice and/or snow for at least part of this upcoming precipitation event that may last into Monday.
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One major storm is bringing heavy snowfall to parts of the Rocky Mountains and central Plains and another is about to slam into the west coast of the US. Heavy snow from the first storm continues across the Rockies and has stretched into the central Plains and it’ll make a push into the Upper Midwest on Wednesday. This same system will then head eastward and drag a strong cold front across the Mid-Atlantic/NE US tomorrow evening and the winds will become quite strong with gusts past 40 mph. The second major storm will rapidly intensify before making landfall later tonight near the California/Oregon border and it will bring heavy rain and damaging winds to coastal sections and tremendous snows to inland higher elevation locations of the Sierra Nevada mountain range where the snow will be measured in feet over the next few days. This second storm will cross the nation and arrive in the Mid-Atlantic/NE US this weekend where there will be a lot of cold air and accumulating ice and snow could be the result in interior sections.
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Two powerful weather systems will impact the nation over the next few days which includes the big travel day tomorrow and Turkey Day on Thursday. The first system is already bringing heavy snow to the Rocky Mountain States and this storm will intensify rapidly as it heads towards the Upper Midwest on Wednesday. The result will be a wide swath of significant accumulating snow from Denver to Minneapolis - just in time for Thanksgiving Day. Another storm will become a powerhouse for the west coast and it will bring significant rain and potentially damaging winds to coastal sections and heavy mountain snows measured by the foot to the Sierra Nevada. This storm will arrive tonight near the California/Oregon border and then will begin to gradually weaken as it moves inland.
In the local region, the first storm will drag a cold front through here at mid-week and we’ll likely experience very strong winds from later Wednesday into Thursday, Thanksgiving Day. The second storm will cross the country and impact us here this weekend. Enough cold air will be around to raise the possibility of ice and/or snow at the onset of the weekend precipitation event likely in the late Saturday/early Sunday time frame.
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Two big storms will impact much of the nation this week in a week that features the busiest travel day of the year and, of course, the Thanksgiving Day holiday. The first system will bring about another “Denver-to-Minneapolis” snowstorm over the next couple of days – similar to a storm back in October. This system will then drag a cold front across the Mid-Atlantic/NE US later Wednesday and the winds will become quite strong – too strong for any balloons to be used in the Thursday parade in New York City. The second storm of note will become a powerhouse system in the hours before it makes landfall later tomorrow night near the Oregon/California border region. In fact, this Pacific Storm will intensify dramatically in the 24 hours preceding landfall – perhaps to what meteorologists call “bombogenesis” levels which requires a drop of 24 millibars in a 24-hour period. This second storm will bring damaging winds and heavy rain to coastal sections of Oregon/California and tremendous snows to inland higher elevation locations such as the Sierra Nevada Mountains. The second storm will trek all the way across the nation and likely result in ice and snow for the Mid-Atlantic/NE US during the upcoming weekend.
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High pressure will take control today and we’ll start off the holiday week with a couple of dry and moderately chilly days in the Mid-Atlantic region. A strong cold front will cross the northern US over the next few days and it’ll arrive here on Wednesday. Strong, cold high pressure will build into the north-central and northeast US later this week following the passage of the cold front and this will result in a windy, cold, dry Thanksgiving Day in the Mid-Atlantic region.
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High pressure will push off the coast today and a cold front will approach the area from the northwest. Ahead of the front, temperatures will climb into the 50’s, the wind will pick up, and there can be a few showers from mid-morning to mid-afternoon. Skies will clear tonight, winds will diminish, and it’ll turn quite cold once again with overnight lows in the upper 20's. On Saturday, low pressure will form over the Tennessee Valley and head towards the central Appalachians and then a secondary system will intensify early Sunday near the Mid-Atlantic coastline. As a result, a cold soaking rain will overspread the region late in the day on Saturday or early tomorrow night and continue into Sunday morning with some improvement possible late Sunday. There is an outside chance for some snow or sleet to mix in at times during this event in the normally colder suburban locations well to the north and west.
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