of Jet Stream
Eastern Pacific
& Western
North America
(Sketch map)
& Warnings
Animation of Jet Stream Forecasts

NOTE: If the animation does not seem to be working correctly, check your computer's date/time--the animation depends on its accuracy!

Images provided by the California Regional Weather Server, sponsored by the Department of Earth & Climate Sciences at San Francisco State University. The California Regional Weather Server provides more detail, including a general description of jet stream analysis and forecast maps.
Send questions, comments, and feedback about this JavaScript to the author, Dr. Dave Dempsey, at

Last modified June 19, 2012