Polygonal Eye Walls and Rainbands in Hurricanes

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  • 1 National Hurricane Research, Laboratory/NOAA, Gables One Tower, 1320 S. Dixie Highway, Coral Gables, Fla. 33146
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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.

1 Billy M. Lewis died 23 December 1980.

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.

1 Billy M. Lewis died 23 December 1980.

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