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“Dry Hole” in Venezuelan Mesoscale Cyclone

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  • 1 National Center for Atmospheric Research, Boulder, Colo. 30307
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Abstract

An unusual series of radar photographs was encountered in a major rainstorm in Venezuela in 1972. An elongated hole in the S-band radar presentation worked its way from the echo edge toward the center, then became an island and finally disappeared after one hour. The suggested mechanism for this event is a vertical wave motion superimposed on a rotating mesoscale cyclone.

Abstract

An unusual series of radar photographs was encountered in a major rainstorm in Venezuela in 1972. An elongated hole in the S-band radar presentation worked its way from the echo edge toward the center, then became an island and finally disappeared after one hour. The suggested mechanism for this event is a vertical wave motion superimposed on a rotating mesoscale cyclone.

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