The first seven days of November have averaged more than 2.6ºC colder-than-normal across the nation and there is another very impressive cold air outbreak on the way for the eastern two-thirds. The first blast of much colder-than-normal air arrived in the Mid-Atlantic/NE US in the overnight hours and tonight will be the coldest so far this season. The next shot of Arctic air is already building up in Canada and it will reach the Northern Plains/Upper Midwest later in the weekend, cross the Great Lakes on Monday, and then into the Mid-Atlantic/NE US on Tuesday. This blast of Arctic air will not only spread out across a larger portion of the country compared to the initial shot, but it will be even colder. In fact, numerous daily low temperature records are likely to be set next week across the eastern two-thirds of the nation and there will likely be many sites recording their lowest temperatures ever for so early in the season.
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A much colder-than-normal air mass with its origins in northern Canada arrived in the Mid-Atlantic region in the overnight hours and the next couple of days will be well below-normal for this time of year. Another cold blast will push across the Northern Plains/Great Lakes early next week and arrive here by Tuesday night. Next week's cold blast could feature a rain-changing-to-snow scenario at the onset, but it doesn't look like anything significant at this time.
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One cold shot is headed this way from northern Canada and another one is coming for the early and middle parts of next week. As the cold air pushes to the southeast later today, moisture will push northeast along the advancing frontal boundary zone and rain is likely here late in the day and early tonight. The rain could mix with some flakes before ending tonight as the colder air pours into the region and the next two days will see highs confined to the 40's. Next week's cold blast could feature a rain-changing-to-snow scenario at the onset in the Mid-Atlantic region and northeastern US.
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The first five days of November have been colder-than-normal across a large part of the nation and there won’t be any let up for the eastern two-thirds of the nation through at least the middle part of the month. The next blast of cold air will reach the eastern states in the Thursday night/Friday morning time frame and then another shot comes by the early-to-middle parts of next week. Rain will accompany the arrival of the first cold frontal system later tomorrow into tomorrow night and it can even end as some snowflakes in parts of the I-95 corridor. Accumulating snow is likely late tomorrow night in far interior regions of the NE US from southwestern NY to northern Maine with the influx of the cold air. The Arctic frontal system arriving early-to-middle next week could feature the development of low pressure along its boundary zone and that puts rain-changing-to-snow on the table for the I-95 corridor.
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A significant cold air outbreak is headed to the Mid-Atlantic/NE US from the northern part of Canada at the end of the work week and another is coming for the early part of next week. As high pressure ridging intensifies across Alaska and western Canada, the upper-level air flow will develop in such a manner that will allow for the transport of air from way up in Canada to the central and eastern US. As the cold air pushes to the southeast late this week, moisture will push northeast along the advancing frontal boundary zone and rain is likely here late tomorrow into tomorrow night. The rain could change to snow showers late tomorrow night in the I-95 corridor and there will be accumulating snow from western New York State to the upper part of Maine with this influx of cold air. Next week's cold blast could bring a threat of snow to the Mid-Atlantic region and northeastern US.
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November has started off much colder-than-normal across the nation and there won’t be any let up for the eastern 2/3rds of the nation into at least the middle part of the month. The cold start to the month follows a colder-than-normal October across the CONUS with more than twelve-hundred sites experiencing the lowest temperature ever in the month of October and, even-more impressive, many locations set their monthly record for the month as a whole. Multiple cold air outbreaks will ride along the polar jet stream during the next couple of weeks from the northern part of Canada to the Mid-Atlantic/NE US with the first one arriving in the Thursday night/Friday time frame and another next Monday. The late week cold blast will also feature rain-changing-to-snow in parts of the interior Mid-Atlantic and NE US and several inches can accumulate from western New York State to upstate Maine.
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It’ll turn a bit milder today ahead of a weak cold frontal system, but then cooler again for the next couple of days. A significant cold air outbreak appears to be headed in this direction from central Canada for the end of the work week and, at the same time, moisture is likely to advance to the northeast from the southern states along the frontal boundary zone. There is a chance that this could result in a rain-changing-to-snow showers type of scenario from late Thursday night into early Friday morning for at least parts of the region. Whether or not the snow showers actually materialize, the cold blast will be the bigger story and temperatures Friday night will be unusually cold for early November. Another very impressive cold blast for the early season is destined to arrive here early next week.
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November has started off colder for the nation as a whole than all but two years (1991, 2002) going back to the late 1970’s and there won’t be much let up for the eastern 2/3rds through at least the middle part of the month. The powerful frontal passage late last week in the eastern US was part of an overall pattern change and the warmth of October has transitioned to the cold of November. There will likely be multiple cold air outbreaks over the next couple of weeks that ride along in the polar jet stream from central Canada to the Mid-Atlantic/NE US. After a bit of a warm up on Tuesday, it’ll turn cooler again at mid-week, but it is the late week when another impressive cold air blast will arrive. This next shot of cold air will drop southeastward from Canada and arrive in the Mid-Atlantic/NE US in the Thursday night/Friday time period. Another cold air outbreak is destined to reach the central and eastern US early next week. Both of these cold air outbreaks may present some snow possibilities for the Great Lakes and interior NE US and even to parts of the Mid-Atlantic region.
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The overall weather pattern continues to look quite chilly for the next couple of weeks with a persistent flow of air from central Canada into the Mid-Atlantic region. While it’ll turn a bit milder on Tuesday, the passage of another cold front will bring more chilly air to the region for the mid-week and quite a cold air mass for early November will arrive at the end of the week. At the same time, low pressure may pull out of the southern states and we’ll have to watch for the possibility of rain or even rain-changing-to-snow at week’s end. Another cold blast is destined to arrive in the central and eastern US next week.
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Every once in awhile there is a frontal passage that not only brings about a change in air mass for the short-term, but it can be associated with a longer-term pattern change and that looks to be the case with the powerful cold front that blasted through the Mid-Atlantic region and northeast US last night. In this particular case, the frontal passage happened to occur right around the transition from October-to-November and the overall temperature pattern indeed looks to me like it’ll flip across the nation. In October, temperatures were generally above-normal in the eastern US and below-normal in the western can central states - and in some cases significantly so. All signs point to a flip of this pattern in November with colder-than-normal weather for the Mid-Atlantic/NE US/Midwest/Great Lakes and warmer-than-normal conditions in the western part of the country.
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