http://www.thunderbolts.info/forum/phpBB3/viewtopic.php?f=10&t=16329&start=255#p122459
Jet streams are conduits that tunnel through the friction and general incoherence of the gases in the atmosphere to balance out what would otherwise be some extremes of heat/high pressures and cold/low pressures. Constructed from layers of spinning microdroplets of H2O with maximized surface tension, jet streams are a consequence of the principle that maximization of the surface area of H2O maximizes the tensional forces of H2O. These conduits emerge along moist dry wind shear boundaries, especially those associated with the extensive, flat boundary between the top of the troposphere and the bottom of the stratosphere, prime conditions for wind shear. The ensuing vortices of surface tension maximized spinning microdroplets provide a slick hydrophobic inner surface that channels moist air at speeds up to 300 mph.