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Jet stream
Videos
Jet streams are fast flowing, narrow air currents in the atmosphere. It is the physical mechanism of a teleconnection. The main terrestrial jet streams are located near the altitude of the tropopause
Clouds along a jet stream over Canada.
Clouds along a jet stream over Canada.
General configuration of the polar and subtropical jet streams
General configuration of the polar and subtropical jet streams
Hurricane Flossie over Hawaii in 2007. Note the large band of moisture that developed East of Hawaii Island that came from the hurricane.
Hurricane Flossie over Hawaii in 2007. Note the large band of moisture that developed East of Hawaii Island that came from the hurricane.
Polar vortex
Videos
A polar vortex, more formally a circumpolar 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-obl
Jet stream
…westerly winds, flowing west to east around the globe. The Northern Hemisphere and the Southern Hemisphere each have a polar jet around their respective polar vortex at around 30,000 ft (5.7 mi; 9.1 km) above sea level and typically travelling at around 110 mph (180 km/h) although often considerably faster. Closer…
A strong tropospheric polar vortex configuration in November 2013
A strong tropospheric polar vortex configuration in November 2013
A more typical weak tropospheric polar vortex on January 5, 2014
A more typical weak tropospheric polar vortex on January 5, 2014
Polar vortex and weather impacts due to stratospheric warming[clarification needed]
Polar vortex and weather impacts due to stratospheric warming[clarification needed]
Low pressure area over Quebec, Maine, and New Brunswick, part of the northern polar vortex weakening, on the record-setting cold morning of January 21
Low pressure area over Quebec, Maine, and New Brunswick, part of the northern polar vortex weakening, on the record-setting cold morning of January 21, 1985