Until now, no one was able to experience the ocean-like breaking of waves in the air above our heads—except when jet planes experienced sudden losses of altitude. Now a new turbulence warning system is being developed by scientists at the National Center for Atmospheric Research in Boulder, Colo., to alert air traffic controllers and pilots to turbulent conditions. The warning system, which is being developed for Hong Kong's new airport and tested at Juneau, Alaska, summarizes data from a wind profiler, anemometer, and Doppler lidar (a type of laser).