How does the polar vortex influence the polar night jet?

Feb 17, 2025 ... "Polar vortex" usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter. The polar vortex is an area of low pressure—a wide expanse of swirling cold air—that is parked in polar regions. During winter, the polar vortex at the North ... Apr 9, 2019 ... The 2014 Polar Vortex (officially the 2014 North American Cold Wave) led to record low temperatures in the US and caused PJM's grid to face dire reliability ... That large pocket of low pressure and cold air always swirls around the North Pole, but when it expands southward, it also brings a noticeable bitter freeze. Jan 17, 2025 ... Colorado will be bitter cold but a polar vortex it is not ... Colorado will see its coldest temperatures of the winter as a mass of cold air ... ... Polar Vortex." Even though this basic mechanism is commonly associated with severe, North American cold air outbreaks, the term caught on, and the entire ... Oct 21, 2020 ... A particularly extreme case of stratospheric vortex weakening is known as a sudden stratospheric warming (SSW), thus called because of the rapid ... Jan 16, 2025 ... The polar vortex is an enormous ring of powerful winds spinning above the North Pole. It normally circles the Arctic and it typically stays contained by a ... Apr 13, 2021 ... In New York, the frigid winter of 2013-14 offered a number of lessons that continue to serve energy reliability today. Apr 13, 2022 ... A briefing series on strategies, policies, and programs preparing communities around the country for four major climate threats: polar vortices, sea level rise ...