![]() ![]() Thus having an important role in the winter weather across the high and mid-latitudes.Īs the vortex spins high above our troposphere, it is still directly connected to the lower part where we live. The troposphere and the stratosphere layers are particularly crucial for Earth’s climate because the vortex covers most of the bottom half of the atmosphere, from the Earth’s troposphere up into the stratosphere. It surrounds the North and South poles and is the strongest during winter. Located about 20-50 km above the Earth’s surface. The polar Vortex is an enormous, three-dimensional ring of potent winds. Our weather has one very important feature in the stratosphere for all the dynamics. The Ozone layer, vital in protecting our planet, is also found in the stratosphere. A stratosphere layer is about 12-50 km thick and very dry there. It is the deepest above the equator but gets thicker above both poles.Ībove this layer is a much deeper one known as the stratosphere. Its depth varies from 8 km to nearly 20 km. The troposphere layer extends from the Earth’s surface (known as the sea level) up to 12 km high. The troposphere layer, where we live, is the lowest. Most of the weather dynamics for all life on our planet occur in the lowest two, the troposphere and the stratosphere above. THE POLAR VORTEX ABOVE USĪs we know, our atmosphere has several layers around the Earth. This feature plays a major role in winter, sending cold outbreaks and snowstorms across the northern hemisphere. As will be discussed below, its coldest part sits over Arctic Canada this December. Meanwhile, the Polar Vortex circulation aloft remains quite powerful this winter. The temperature anomaly is particularly intense even for December, with airmass nearly 30 degrees colder than usual across the nation. This video animation forecast below hints at the impressive spread of the frigid Arctic cold temperatures from central Canada deep south into the United States in the final days before the Christmas holidays. Expect Christmas holidays to be bitterly cold this year, forecast to persist towards the New Year. ![]() With the more meridional, north-northwesterly flow establishing aloft, much colder weather and low windchills will also reach Texas and parts of Florida late next week. Those will gradually begin spreading south on Monday while plunging into low -40s F across southern Canada before the Arctic outbreaks turn for the United States. ![]() Temperatures are already very cold across Canada, with many under frigid cold mornings around -20 to -30 degrees F. This will allow a large pool of extremely cold air mass in west-central Canada to plunge toward the southeast. This weekend, a strong jet stream (high-level winds aloft) racing across the central parts of the Contiguous US will shift from westerly to more northwesterly. ![]() Tens of roads, including part of Interstate I-90, were closed by massive snow drifts and blowing snow. The snow blizzard was intense across both Dakotas, with South Dakota being the worst hit. A typical occurrence when high moisture is being advected into higher terrain is known as orographic snowfall. The Black Hills town of Deadwood received more than 4 feet of snow. Strong pressure and temperature differences lead to strong winds that combine with heavy snow, leading to intense blizzard conditions, low visibility, and difficult driving conditions. The satellite image below reveals an impressive winter storm centered over Nebraska on Tuesday, with northern Plains under a comma cloud shield where the most intense winter weather normally develops. This will lead to the coldest temperatures so far this winter season 2022/23, for many.Ī significant weather change will happen just days after the major winter storm Diaz brought blizzards and a huge amount of snow to Dakotas. The cold air is forecast to spread far south, reaching the Gulf Coast and Southeast. The upcoming event will lead to near-record or even historic cold temperatures by mid-week into the holiday weekend. So far, the winter season across North America has been pretty cold, thanks to much colder than normal weather in Canada since mid-November. IMPORTANT UPDATE: Millions across North America will face Deep Freeze and the Coldest Christmas in Years as Powerful Storm Elliot develops this week The Arctic blast will lead to a major winter storm that could become a bombogenesis cyclone and blanket Great Lakes and Northeast with deep snow and blizzards around Christmas. A potentially historic cold with frigid air mass will send millions across the Plains and Midwest into deep freeze, reaching deep South and Southeast U.S. An Arctic cold outbreak is forecast to plunge from Canada into the United States just a few days before the Christmas holidays. ![]()
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