between 92 km/h (50 kn; 57 mph) upto 398 km/h (215 kn; 247 mph)
Jet Streams
Narrow bands of high-speed winds are called jet streams. These fast-flowing air currents exist high in the Earth's atmosphere, typically near the tropopause, and can greatly influence weather patterns and air travel routes.
Meteorologists use weather balloons, aircraft data, satellites, and computer models to study jet streams. These tools help them monitor the speed, direction, and strength of jet streams in the atmosphere.
Jet streams
Jet airliners travel at about 500mph
Jet streams give off chemicals that penetrate the air and trickle down to where we breathe. Streams also affect the weather because of the jets high speed, potentially causing storms and tornadoes if two jet streams intersect.
There are typically four jet streams on Earth: two in each hemisphere. These are the polar jet streams and the subtropical jet streams. Polar jet streams are found closer to the poles, while subtropical jet streams are located closer to the equator.
jet streams travel above global winds. might not be a straight forward answer, but its something.
The atmosphere is filled with constantly moving air streams, determined by the temperature differences in various areas of the earth. One of these is the jet stream, which runs east to west around the world. Source:http://www.ehow.com/facts_7619399_jet-stream-affect-flights.html
Narrow belts of high speed winds in the upper atmosphere are known as jet streams. These fast-flowing air currents can have significant influence on weather patterns and are commonly found near boundaries between warm and cold air masses. Jet streams are strongest in the wintertime when temperature contrasts are typically the greatest.
Jet Streams are narrow belts of high speed winds.
jet streams travel above global winds. might not be a straight forward answer, but its something.