A stream of air, about 12 km (8 miles) high, with an average speed of 100 km/hr (67 mph) at 30 to 50 degrees north latitude. Jet stream winds are from a general westerly direction, and since mid latitude storm systems follow the jet stream, it is also known as the "storm track".
a band of high winds usually found in the upper troposphere: wind speeds can exceed 90 m/s. Jet streams are also located in the stratosphere and, with lower speeds, in association with the atmospheric boundary layer. [see also the main FAQ Q/A 2A.1
the world's fastest upper-air winds. Jet streams travel in a west-to-east direction, at speeds of 80 to 190 miles (130 to 300 kilometers) per hour, around 30,000 feet (9,150 meters) above the ground. Jet streams occur where the largest differences in air temperature and air pressure exist. In North America, jet streams are typically found over southern Canada and the northern United States, as well as over the southern United States and Mexico. The northern jet stream is called the polar jet stream, and the southern jet stream is called the subtropical jet stream.
High-speed winds usually found at high altitudes, just below the tropopause, between 25,000 and 45,000 ft. The term jet stream was coined by the first pilots who encountered this strong wind, to whom it seemed as though the air was being blown out of a gigantic nozzle, or jet.
Relatively strong winds that are concentrated in a narrow band in the atmosphere. Jet Streams are usually thousands of kilometers long, hundreds of kilometers wide but only a few kilometers thick. They are usually found between 6 and 10 miles above the surface.
A narrow band of strong winds in the atmosphere that controls the movement of high and low pressure systems and associated fronts. Jet Streams meander from time to time. Wind speeds can reach 200 mph or higher in certain cases. It is usually found at 30,000 to 40,000 feet above the earth's surface. It owes its existence to the large temperature contrast between the polar and equatorial regions. The position and orientation of jet streams vary from day to day. General weather patterns (hot/cold, wet/dry) are related closely to the position, strength and orientation of the jet stream (or jet streams). A jet stream at low levels is known as a low-level jet.
An undulating band of strong high-altitude winds which may occasionally exceed 400 km/h. In Canada, the jet stream travels mostly from west to east and may extend over hundreds of kiiometers. It has an altitude of about 9,000 meters. Pilots flying at high altitudes often search out the jet stream to speed along eastbound flights.
a fast moving river of air [traveling at 190 mph (300 kmph)] in the upper part of the lower atmosphere, which often marks the boundary between different air masses. There are two jet streams: the polar jet stream and the weaker sub-tropical jet stream.
Flat tubular, quasi-horizontal, current of air generally near the tropopause, whose axis is along a line of maximum speed and which is characterized by great speeds and strong vertical and horizontal wind shears.
A high-speed, meandering wind current, generally moving from a westerly direction at speeds often exceeding 400 kilometers (250 miles) per hour at altitudes of 15 to 25 kilometers (10 to 15 miles). In the Western United States, the jet stream's north-south latitudinal position largely determines the application and intensity of precipitation during the winter months when most rain and snowfall occur.
A strong narrow current concentrated along a quasi horizontal axis in the upper troposphere or in the stratosphere, characterized by strong vertical and lateral wind shears and featuring one or more velocity maxima ( jet streaks). The speed of the wind must be greater than 60 knots (31 m/s).
An area of strong winds that are concentrated in a relatively narrow band in the upper troposphere of the middle latitudes and subtropical regions of the Northern and Southern Hemispheres. Flowing in a semi-continuous band around the globe from west to east, it is caused by the changes in air temperature where the cold polar air moving towards the equator meets the warmer equatorial air moving polarward. It is marked by a concentration of isotherms and strong vertical shear.
A strong band of wind or winds in the upper troposphere or in the stratosphere, moving in a general direction from west to east and often reaching velocities of hundreds of miles an hour. See jetstream, note.
The jet stream is a high-speed wind that is usually found at high altitudes, between 25,000 and 45,000 feet (just below the tropopause). It is called the jet stream because the first people who encountered the jet stream were pilots who described it as though the wind was being propelled from a jet engine.
Jet streams are fast flowing, relatively narrow air currents found in the atmosphere at around 11 kilometres (36,000 ft) above the surface of the Earth, just under the tropopause. They form at the boundaries of adjacent air masses with significant differences in temperature, such as of the polar region and the warmer air to the south.