The use of a jet stream nomogram

In an attempt to determine the horizontal structure of the jet stream the U.S. Navy undertook a series of aircraft traverses at 30,000 feet pressure altitude. The results were published by Riehl, Berry and Maynard (1955) who constructed a typical wind velocity profile through a jet core and suggested two empirical equations likely to give a good fit for any jet stream. The graphical solutions of these equations were sketched by Mr. R.H. Clarke. formerly of Central Analysis Office, Bureau of Meteorology, as a nomogram, by which the velocity and position of the jet maximum could be obtained, given a stuiable traverse of the jet from a wind on the cold side to a wind on the warm side.