It was noted from analyses of radar data obtained in hurricanes that both the spiral bands and the inner boundary of the wall cloud frequently were composed of a series of straight line segments. Indeed, the eye of a strong hurricane is frequently polygonal rather than circular or elliptical. These features may have a possible kinematic explanation based on interference among differing wavenumbers and frequencies of internal gravity waves.

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Footnotes

1 Billy M. Lewis died 23 December 1980.