Usually found in frontal zones, especially at high latitudes in the upper troposphere, and moving at speeds over 30 meters per second are, for ten points, what bands of strong winds?
Smaller ones, including the subtropical and tropical easterly, also produce Rossby waves in their flow axis.  A result of the Earth's meridional temperature gradient, their motion is due to Coriolis forces.  Usually found in frontal zones, especially at high latitudes in the upper troposphere, and moving at speeds over 30 meters per second are, for ten points, what bands of strong winds?
Smaller ones, including the subtropical and tropical easterly, also produce Rossby waves in their flow axis.  
jet streams