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Early 2019 North American cold wave. In late January 2019, a severe cold wave caused by a weakened jet stream around the Arctic polar vortex [5] hit the Midwestern United States and Eastern Canada, killing at least 22 people. [3][4] It came after a winter storm brought up to 13 inches (33 cm) of snow in some regions from January 27–29, and ...
A more typical weak tropospheric polar vortex on January 5, 2014. A circumpolar vortex, or simply polar vortex, is a large region of cold, rotating air; polar vortices encircle both of Earth's polar regions. Polar vortices also exist on other rotating, low- obliquity planetary bodies. [1] The term polar vortex can be used to describe two ...
A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperatures rise by several tens of kelvins (up to increases of about 50 °C (90 °F)) over the course of a few days. [1] The warming is preceded by a slowing then reversal of the westerly winds in the stratospheric polar vortex. SSWs occur about six times per decade ...
Records are being shattered and communities are enduring the harshest cold in decades as the polar vortex tightens its grip on the midwestern United States.
A quick but intense blast of Arctic air will barrel into the Northeast later this week to deliver quite a cold shock to the Northeast and neighboring Canada, AccuWeather meteorologists warn. The ...
The image above is a chart that shows the current and forecast strength for the Northern Hemisphere polar vortex. It is referred to as the zonal wind at the 10 hPa (hectopascals) level in the ...
The January–March 2014 North American cold wave was an extreme weather event that extended through the late winter months of the 2013–2014 winter season, and was also part of an unusually cold winter affecting parts of Canada and parts of the north-central and northeastern United States. [5] The event occurred in early 2014 and was caused ...
The Arctic oscillation (AO) or Northern Annular Mode / Northern Hemisphere Annular Mode (NAM) is a weather phenomenon at the Arctic pole north of 55 degrees latitude. It is an important mode of climate variability for the Northern Hemisphere. The southern hemisphere analogue is called the Antarctic oscillation or Southern Annular Mode (SAM).