Low pressure continues to spin off the Mid-Atlantic coastline, but most of its impact will remain to our east. A west-to-east moving cold front will arrive late Saturday and finally help to push the western Atlantic low pressure system farther out to sea. A weak disturbance could throw some clouds and showers our way later Sunday or on Sunday night. The overall pattern will remain on the cool side going through the early and middle parts of next week.
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Low pressure will continue to strengthen off the Mid-Atlantic coastline today and it’ll generate windy, damp and cool conditions around here with occasional showers. A west-to-east moving cold front will arrive late Saturday and finally help to push the western Atlantic low pressure system farther out to sea. The frontal passage will also maintain an overall relatively cool weather pattern here through the early and middle parts of next week.
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A very active weather pattern across North America will bring a tremendous early season shot of cold air and accumulating snow to the region from the Rockies to the Northern Plains over the next few days and two systems off the east coast will merge into one powerful storm just off the Mid-Atlantic/NE US coastlines. The cold front that passed through the Mid-Atlantic region earlier this week has stalled out over the western Atlantic and low pressure has formed along its boundary zone. Another low pressure system has formed a few hundred miles off the South Carolina coastline and is already producing winds near tropical storm strength. Ultimately, this second system is likely to merge with the “frontal boundary zone” low pressure system just to its north and form one powerful storm. A west-to-east moving cold front will arrive late Saturday and finally help to push the Atlantic low pressure system farther out to sea. It will also maintain an overall relatively cool weather pattern through the early and middle parts of next week.
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A cold front has slipped through the region to a position over the NW Atlantic where low pressure will intensify over the next 12-24 hours along its boundary zone. The strong low pressure system will meander just offshore over the next few days and some clouds and rain will back into the I-95 corridor at times. A west-to-east moving cold front will arrive this weekend and finally help to push the Atlantic low farther out to sea. It will also maintain the cool weather pattern going into the early and middle parts of next week.
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A cold front will slowly close in on the east coast today and it’ll result in occasional rain throughout much of the eastern US. As the front stalls out over the western Atlantic on Tuesday, low pressure will form along the boundary zone and this system could impact the region with clouds and possible showers on Tuesday, Wednesday and Thursday. A cool front will arrive from the west this weekend finally pushing the low pressure system away from the northwestern part of the Atlantic and another comfortable air mass will move into the Mid-Atlantic.
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The coolest air of the season so far will push into the region today on stiff north winds and temperatures by early tomorrow should be near the 40 degree mark in many suburban locations. Despite plenty of sunshine on Saturday, it’ll stay quite cool with high pressure to our north remaining in control. This ridge of high pressure will slide off the coast on Sunday allowing for somewhat warmer air to push into the area from the southwest ahead of the next frontal system. As the front slowly pushes towards the region on Monday, the chance for rain will increase along the eastern seaboard. Another cool air mass will follow the frontal passage in the Mid-Atlantic region for Tuesday and Wednesday of next week.
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Temperatures on Wednesday afternoon were in record territory for the date in much of the Mid-Atlantic region and, in some cases, October monthly high temperature records were threatened or broken. In the overnight hours, however, a dramatic change in air mass has taken place in areas north of the PA/MD border as a back-door cool front dropped north-to-south across the region. Temperatures this morning across the northeast US were as much as 25 degrees colder compared to yesterday morning at the same time and they are likely to go nowhere over the next few hours in places like Philly and NYC. The cool air sticks around into the weekend and then it’ll turn a bit warmer early next week and that warm up could be associated with a significant rain event in the I-95 corridor.
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It has turned dramatically cooler today on the heels of an overnight frontal passage and skies will remain cloudy with occasional showers. Temperatures have likely already peaked for the day and will tend to drop slowly over the next few hours. A secondary cool front will usher in a reinforcing cool air mass for tomorrow and Saturday and temperatures by early Saturday morning are likely to be at the lowest levels so far this season in the Mid-Atlantic region. It’ll turn a bit warmer on Sunday and Monday and there may be a significant rain event along the I-95 corridor during the Sunday night/Monday time period with the arrival of another frontal system.
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Today will be the hottest day of the week and quite unusually warm for the early part of October. In fact, record highs are possible in some spots later today as temperatures make a run towards the 90 degree mark. It’ll turn much cooler on Thursday following the passage of a back door cool frontal system in the overnight hours and then a secondary cool front will usher in a reinforcing cool air mass for Friday and Saturday. It’ll turn warmer again early next week and there may even be a decent rain event along the I-95 corridor during the Sunday night/Monday time period - a rarity in recent weeks.
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High pressure pushes off the coast today and this will open the door for much warmer air to push in from our southwest. Temperatures should climb to near 80 degrees this afternoon and then make a run into the mid-to-upper 80's on Wednesday – perhaps even challenging the record for the date in some spots. Much cooler air arrives on Thursday and Friday and it stays cool going into the upcoming weekend. We'll start to turn warmer again early next week and there will likely be a chance for showers and thunderstorms on Sunday night and Monday.
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