An easy to read map of the Jet Stream over Western Europe.
Weather.com
Five day U.S.A. Jetstream Forecast
Supplied by the Weather Channel.
A good, easy to read and understand, map of the Jet Stream over the U.S.A.
What generates the jet stream?
Why does it flow from west to east?
Jet Stream Frequently Asked Questions.
How the Jet Stream Influences the Weather
The jet stream is a river of fast flowing air at high altitudes above the earth that generally flows from west to east over the mid-latitudes.