The polar vortex just isn’t a storm. It’s the everlasting circulation sample that surrounds the poles of the Earth. A number of occasions a yr, the northern polar vortex transitions between stronger and weaker phases. When the polar vortex is constructive, excessive strain is stronger over the polar area which retains the overall circulation comparatively flat in order that climate techniques transfer kind of in a west to east trend. This retains the coldest air locked up within the excessive latitudes. When the polar vortex goes damaging, the movement across the pole will get wobbly, which permits intrusions of Arctic air into the mid-latitudes which incorporates locations like Fargo-Moorhead. The polar vortex has gone destructive this week and, positive sufficient, our delicate climate is popping colder.