At the northern hemisphere when the cyclonic wind current of the nested polar vortex is blocked by the mountain ranges, it is dragged and thus its overall intensity would be weakened.
Atmospheric air molecules are bonded with their intermolecular cohesion, therefore when an Arctic polar vortex is generated, all the atmospheric layers at the North Pole[w] driven by its rotational force would differentially move in unison.
Despite the altitude of stratosphere[w] is high up at 10 to 50 kilometers above the troposphere[w], the higher density troposphere air mass at the bottom blocked by mountain ranges acts like a brake to drag on the air mass at stratosphere from spinning at its full wind speed. This would absolutely reduce the intensity of the polar vortex at the North Pole, as thus the vortex column could not be formed like the Antarctica polar vortex on the opposite side of the Earth that is relatively free of blockage.
See the UVS topic on "Tornado" that explain how land masses could have diverted the path of a jet stream to a narrow terrain, and when intensified in a narrow path of for airflow, a chain of tornadoes could be formed when a strong Solar System alignment effect occurs.
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The inception of this UVS topic was in 2007 with ongoing updates since.
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