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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It’ll turn milder today ahead of the next frontal system, but there will also be an increased chance of showers. That threat for showers will continue tonight and on Friday, but with colder air moving in, there can be a mix of rain and snow showers in the Tennessee Valley. After a bit of a warm up on Saturday, there will be a glancing blow of cold air by the early part of next week.
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High pressure controls the weather for another day, but it’ll remain on the chilly side despite some sunshine. “Radiational cooling” conditions will quite favorable tonight with clear skies, calm winds, and cold air in place and late night lows will drop to near 30 degrees. It’ll turn milder on Thursday ahead of the next frontal system, but there will also be an increased chance of showers.
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High pressure is building into the region today, but it’ll remain on the chilly side with a noticeable breeze. Strong low pressure meandering off the Mid-Atlantic coastline is resulting in a strong pressure gradient in the area between it and the incoming high pressure system. It won’t be quite as harsh on Wednesday with high pressure in place, but temperatures tomorrow night will drop noticeably as there will be favorable “radiational cooling” conditions with clear skies and calmer winds.
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Low pressure will intensify today near the Carolina coastline and will keep us on the chilly side as low-level northerly winds continue in the area. High temperatures later today will be confined to the 40’s and they’ll drop back to the middle 20’s in the overnight hours. A warming trend will begin at week’s end and we should climb back towards 60 degrees for afternoon highs on Sunday.
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Low pressure will move today from the central Gulf coastal region toward the Mid-Atlantic and the result here will be clouds and possible showers, Shower activity should end this evening as drier and noticeably colder air arrives from our northwest. In fact, low temperatures late tonight are likely to be in the 20’s and it’ll only warm to the lower or middle 40’s on Thursday. A warming trend will begin at week’s end and we should climb back towards 60 degrees for afternoon highs on Sunday.
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Following a frontal passage, it’ll turn drier today and there will be mostly sunny skies and comfortable conditions. A secondary and stronger cold front will approach the region on Wednesday and it will bring with it an increased chance of showers and cooler conditions for the second half of the week.
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A warm front pushed northward through the region on Thursday and this boundary zone will drop back to our south later today and it’ll result in some drying across the Tennessee Valley. It’ll stay quite cool on the north side of this front for the next few days with late night lows not far from 30 degrees. On Monday, milder air will push into the region and we’ll get back to the middle 60’s for highs, but with the warmup will come a chance of showers and thunderstorms.
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A warm front pushes northward today into the region and this system will generate some shower activity as it slows down to a crawl. As a result of its stalling, the chance of showers will continue into early Friday, but the chances will decrease later in the day as the frontal boundary zone shifts back to the south as a cool front. Temperatures will dip into the 20’s on Friday night and will remain on the cool side as we begin the upcoming weekend.
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After the passage of a cold front, northwest flow will take over today and high pressure will shift into the lower Mississippi Valley region. A slightly cooler air mass arrives on the heels of the front and high temperatures will likely be confined to the 50 degree mark. A warm front pushes northward into the area later in the week and it’ll bring us an increased chance of showers.
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