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 strong cold front will cross the region today with morning clouds giving way to partial sunshine by afternoon. It’ll turn breezy and milder by the mid-day and afternoon hours and temperatures are likely to climb to near 50 degrees for highs. Moderate cold air will follow the cold frontal passage for the upcoming weekend and attention will turn to the Gulf of Mexico and Southeast US where a lot of moisture will be gathering. A storm will develop in the southeastern states by early Saturday night and it is likely to impact us here later this weekend. The most likely impact time for this quick-moving storm system will be from later Saturday night into Sunday morning with snow that can mix with or change to rain briefly before precipitation ends on Sunday. Snow accumulations of several inches are on the table for the late weekend storm.
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Low pressure is impacting the Upper Midwest today with accumulating snow from Iowa to Wisconsin and it’ll push into the southeastern part of Canada by later tomorrow. A trailing strong cold front will slide into the eastern US on Friday and there can be a wintry mess of snow, sleet and/or freezing rain ahead of it in some suburban locations of the I-95 corridor from late tonight into early Friday. By later Friday, it’ll turn mild enough for just plain rain showers in the DC-to-Philly-to-NYC corridor and temperatures will likely climb into the 40’s.
Moderate cold air will follow the cold frontal passage for the upcoming weekend and attention will turn to the Gulf of Mexico and Southeast US where a lot of moisture will be gathering. A storm will develop in the southeastern states by early Saturday night and - depending on the interaction of two separate waves of energy aloft - it could end up pushing far enough to the north and east to have an impact the Mid-Atlantic region with accumulating snow - perhaps mixed with rain at times - from late Saturday night into mid-day Sunday. Looking ahead, very cold air will pour into the interior Northwest, Northern Plains, Upper Midwest and Great Lakes early next week and it looks like it will then spread to the Mid-Atlantic region at mid-week - potentially setting us up for an extended period of colder-than-normal conditions…and likely additional snow threats.
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High pressure will be the main player today in the Mid-Atlantic region generating plenty of sunshine which will be quite a change from recent days. Clouds will increase this evening and there can be rain showers towards morning - possibly mixed with sleet and/or snow - as a strong cold front pushes towards the eastern states. It’ll turn milder on Friday ahead of the front and there can be additional rain showers in the AM and temperatures should climb to the upper 40’s. It turns a bit colder this weekend following the passage of the cold frontal system and attention will turn to a storm system over the Southeast US. There continues to be a chance that northern and southern stream energy "phase together" in time for this system to push far enough to the north and east to have an impact on the Mid-Atlantic region.. If so, there would likely be snow or a combination of snow and rain in the Saturday night/Sunday time frame...stay tuned.
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The winter storm that has impacted us since the late weekend is still able to generate snow showers in the DC metro region and it won't relinquish control of our weather until later today. Temperatures today will struggle to reach the upper 30's for highs, but we'll be closer to 45 degrees on Thursday and 50 degrees on Friday as a cold frontal system approaches. That next front can cause snow and/or rain showers here from later tomorrow night into Friday afternoon and then it'll turn colder again this weekend following the passage of the cold front.
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The major winter storm that has impacted the Mid-Atlantic region since the latter part of the weekend continues to produce occasional snow in the area today and it can come down hard for a brief time with additional small accumulations. Snow showers are still possible tonight and the winds will remain quite strong right through tomorrow. High pressure will edge into the region on Wednesday and it’ll stick around on Thursday. A frontal system will cross the area on Friday and it could generate some rain showers in the region to end the work week. One final note, Phil sees his shadow...6 more weeks of winter...very smart rodent.
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Low pressure continues to deepen off the Mid-Atlantic coastline and it will continue to have a major impact on the northern Mid-Atlantic through tonight in the area from eastern PA-to-New Jersey-to-southeastern New York. Mixed precipitation this morning has changed to snow in most places as colder air wraps into the system from the north/northeast. There will continue to be small-scale bands of very heavy snowfall from later today through tonight and many spots will end up with 1-2 feet of accumulation from this long duration storm system by the time it winds down later Tuesday.
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Low pressure will intensify off the Mid-Atlantic coastline today and push very slowly to the north as it encounters a blocking pattern in the atmosphere. Mixed precipitation this morning should change back to all snow by the mid-day or early afternoon as colder air wraps around the intensifying storm off the Mid-Atlantic coastline. The snow can continue at varying rates through tonight and into early Tuesday with some additional accumulations possible and the winds through this period will be quite strong as well.
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A major and complex storm system is coming to the Mid-Atlantic region and it will be a long duration event with impact into Tuesday. Indeed, this storm could turn out to be one of the all-time greats for some sections of eastern PA, upstate New Jersey, and southeastern New York. The storm will come in two phases with the first part already underway and associated with a process known as “overrunning”. The second phase of this major winter storm event will feature a very slow moving and powerful storm just off the Mid-Atlantic coastline.
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The stage is set…Arctic air is in place anchored by strong high pressure to the north and a major and complex storm system is coming to the Mid-Atlantic region and it will be a long duration event with impact from Sunday into Tuesday. Accumulations of 6+ inches are possible in the DC metro region with 12+ inches possible in the Philly and NYC metro areas. The storm will come in two phases with the first part associated with a process called “overrunning” and the second phase featuring a major coastal storm. The combination of the potential heavy snow and strong winds may prompt the need for “blizzard warnings” to be issued in at least parts of the Mid-Atlantic region for this upcoming event.
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