ToughThe OU can be forgiven for not considering that the third hottest February record was on the planet last month. It’s local Temperature drowned During the third week of February 2025, records are being dispersed along the Maidano, Mexico’s Gulf and East coast. Baker, Mont. Bismarck, the ND, fell from six degrees to -39 ° F from its cold day. Week-long Deep Danda Cause Reason? Polar vortex collapse. Now, Halling for meteorologists The second fall in the middle of March, which may sink into a cold spell just a few days before the official arrival of the US, Canada and Europe. So what is the fall of a polar whirlpool and why does it dramatically affect the weather?
As Explains National Weather ServiceThe polar whirlpool is a low pressure and cold air area that is 10 to 30 miles above the surface on both poles of the earth. The word vortex is used to indicate that the air flows in the counterclockwise direction. Both are present in the polar whirlpool year -round, but they weaken in the summer and strengthen in the winter, which is increased and driven by seasonal temperatures. There is a jet flow from the south of the polar vortex of the Arctic, which is a river from west to east air that flows five to nine miles from the ground, and helps to limit the cold air of the pole to the Arctic. When the whirlpool is weak – which it does on occasion – the jet flow becomes avy, the beads in the south, and the Arctic air flowed down to North America and Eurasia, causing the temperature to dissipate in the affected areas.
More dramatic than a weak vortex is a broken vortex. It happens when a layer of arctic air is heated up to 50 ° F or more above the surface 10 to 30 miles, in just two days period, an event called an event Suddenly Stratosphere Warming (SSW). SSW more powerfully weakens the polar vortex, slowing down the spin that keeps frozen air at home in the Arctic and allows it to spread to the south. SSWA led to bitter, snowy conditions in February and the weather models predict the other one is Already forming And may fall late next week and early April. Whether the weather change is playing a role In two falls – increasing global temperature leads to increasing stratospheric temperature – it is unclear. Weather records of level temperature Just reach the 1950sMake for a spotty dataset.
It is uncertain how long the next fall will last, depending on how strong and survive the SSW. The atmospheric warming can pull or displace the vortex from its pole-centered position. But on occasion he can Causing the whirlpool to be completely split into two. It, warning meteorologists, can lead to cold spells that last for weeks.
“The polar whirlpool has been particularly strong and stable over the past few weeks. This has limited the coldest of the Arctic air to the north pole, ”says Meteorologist Mike Battes, Meteorological Channel. “Long range models suggest that the polar whirlpool starts in mid -March. Because the polar whirlpool is generally responded to the nearest surface environment, it means an unusual cold temperature affecting parts of North America and Eurasia in late March and late April. “
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