Seems like a Natural Weather Phenomenon
The following is from NASA: Polar Vortex Facts
https://ozonewatch.gsfc.nasa.gov/facts/vortex_NH.html
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Vortex breakup
The polar vortex is a winter phenomena. It develops as the sun sets over the polar region and temperatures cool. During the spring, the sun rises and the absorption of solar radiation by ozone begins to heat the polar stratosphere. This heating eventually causes the vortex to disappear along with the polar night jet. However, this process is helped along by planetary-scale waves that propagate up from the troposphere. This wave event that drives the vortex breakup (or final warming) acts to also increase the temperature of the polar region and ozone levels. We mark the day of the vortex breakup when the winds around the vortex edge decrease below a particular value (about 15 m s -1on the 460 K potential temperature surface).
(see image)
Northern hemisphere potential vorticity on the 460 K potential temperature surface for several dates in 2009.
We illustrate the polar vortex breakup with six PV images from 2009 for 8 January (top left) through 12 February (bottom right). Each image is one week apart. On 8 January the vortex is fairly symmetric. Through the 15th and 22nd the vortex is elongated and displaced off the pole. By the 29th the vortex has split. The vortex weakens, and as can be seen on 5 February, the streamlines show that the winds have decreased in strength. By the 12th, the vortex has completely collapsed. 2009 is a good example of an early final warming.
The northern hemisphere vortex breakup in the lower stratosphere usually occurs late in March or early in April. However, the breakup can occur as early as February or as late as early May. In contrast, the southern hemisphere vortex is more persistent, and the usual breakup occurs late in November to the middle of December (equivalent to late in May to the middle of June for comparison to the northern hemisphere vortex).