Low pressure just off the east coast this morning will push to the northeast today and any snow that is falling in the region will end and give way to partial sunshine as the day progresses. This active weather pattern will produce yet another coastal storm by later Sunday, but it looks like that particular system will go harmlessly out-to-sea before ever having any impact on the region. An explosive upper air pattern will set up early next week and combine with an Arctic air intrusion to produce yet another threat for snow in the Mid-Atlantic region - most likely in the Monday night/Tuesday time period. Stay tuned.
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An active weather pattern with multiple storm threats is setting up in the Mid-Atlantic region for the next couple of weeks and it will be a challenging time for weather forecasting. The first storm to affect the region is rapidly evolving and it will affect the region from late tonight into early Friday. This storm will produce snow accumulations across much of the region and it will very likely have an impact on the Friday morning commute. Another snow threat comes next week - most likely in the Monday night/Tuesday time frame - and this one could be even more significant than tonight's system possibly affecting the entire I-95 corridor from the Mid-Atlantic to New England.
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Chilly air is pushing into the region today following yesterday’s mild and wet weather conditions. A cold front slid through the area in the overnight hours and it will linger along the east coast today. Low pressure will ride up along that frontal boundary zone later tonight and early Friday and it could throw some snow back into the region between the immediate I-95 corridor and the Delmarva Peninsula coastline. The best chance for small accumulations late tonight/early Friday will be across the Delmarva Peninsula, but they cannot be completely ruled out yet in the immediate Philly metro region. Another cold front will cross the area on Sunday and low pressure is likely to stay off the coast and then we’ll have to monitor a volatile situation for the early and middle part of next week. Deep upper level low pressure will develop across the eastern US early next week at the same time there is an Arctic air intrusion into the northern US – the end result could be another coastal storm to deal with around here. Stay tuned.
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Despite today’s mild weather and the fresh groundhog prognostication for an early spring, winter is not over yet and there will be multiple threats for snow in coming days. In fact, one threat will come as early as late tomorrow night and early Friday morning as low pressure rides up along a stalled out frontal boundary zone just off the east coast. Another storm is likely to miss the region on Sunday as it moves to the northeast well east of the big cities; however, it still bears watching and cannot be completely ruled out. Finally, the unfolding upper-level pattern is likely to generate another system near the Mid-Atlantic coastline around Monday night or Tuesday of next week and this could turn into an important snow event from the Mid-Atlantic to New England.
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Temperatures will jump today ahead of a strong cold frontal system to the 60 degree mark in much of the metro region. At the same time, rain will fall, heavily at times from mid-day on into the early evening, and the combination of the rain and melting snow is likely to create flooding in poor drainage, low-lying areas including some roadways and small streams. More seasonal chill will return to the Mid-Atlantic region on Thursday and it’ll stick around through the upcoming weekend. An explosive upper-level pattern is setting up for the early-to-middle part of next week and it can very well result in another coastal storm for the Mid-Atlantic region.
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All indications suggest that there will be a rather explosive upper air pattern in the early-to-middle part of next week that can result in a storm in the eastern states. A deep upper-level trough of low pressure is likely to develop in the eastern US early next week while at the same time another Arctic air outbreak will be dropping into the northern US from southern Canada. This new Arctic air mass will eventually envelope much of the eastern half of the nation. This combination of an intrusion of Arctic air and deep upper-level trough could very well make for some interesting weather next week in the eastern US.
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A cold front passed through the region late yesterday and the result will be noticeably cooler conditions today, but still above-normal for this time of year. Watch for early morning black ice patches; especially, in the far northern and western suburbs where temperatures are near the freezing mark this morning. Meanwhile, a major storm will pound the northern Plains and Upper Midwest today with blizzard conditions and this storm will send a strong cold front in our direction over the next 24 hours. In the storm’s warm sector, severe weather is possible later today across the Mississippi Valley. Temperatures here on Wednesday will jump ahead of the front – likely reaching 60+ degrees for highs – and the rain will fall heavily at times. The combination of the heavy rain and melting snow will cause some flooding on Wednesday all along the I-95 corridor. Seasonably cold air returns for the latter part of the week and upcoming weekend.
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Winter is now on a break and noticeably milder weather conditions will continue right through mid-week. In fact, temperatures on Wednesday should climb to 60 degrees ahead of a cold frontal system. Showers are likely this afternoon and early evening in the I-95 corridor as an initial cold front pushes through the region. Another cold front will generate a heavy rain event in the region on Wednesday as temperatures climb into near record warmth territory ahead of a second cold frontal system. Colder air pushes back into the Mid-Atlantic region for the latter part of the week following the passage of the secondary front.
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Snow showers are likely today as we close out the work week from a strong cold front that crosses the region from the northwest and there could even be a quick burst of snow and a dusting in spots. Winds will pick up noticeably by this afternoon with gusts to 30 mph and a noticeable breeze will continue in the overnight hours. After a cold day to begin the weekend, winter will take a bit of a break. It’ll turn noticeably milder on Sunday and the warm up will continue right through the middle of next week. Rain is likely here by the middle of next week and it could turn into a heavy rain event. A widespread Arctic air outbreak will then pour into the region on Thursday behind the mid-week storm bringing temperatures back down again to below-normal levels.
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Snow melt continues to take place around here on a pretty favorable basis with generally a manageable amount each day. It’ll stay seasonably cold for the next few days, but noticeably milder conditions are coming for the period of Sunday through Wednesday. Meanwhile, a major storm will works its way across the country next week and it will have big implications all along the way. First, it will spread rain, snow and high winds into California and then blizzard conditions are likely by the middle of next week from the central US to the Great Lakes. Rain associated with this storm is likely to arrive here by Wednesday of next week and it could become a heavy rain event which may present a problem depending on how much snowpack remains. Later next week following the rain event, a widespread cold air outbreak will flood the eastern states with Arctic air.
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