A giant waterspout in the mature stage. During peak intensity this waterspout
had a diameter of approximately 30 meters. A full discussion of this waterspout
is in "Life Cycle of Florida Keys' Waterspouts" by Joseph H. Golden, NOAA
Technical Memorandum ERL NSSL-70, 1974. Library Call Number
QC807.5.U6 N7 no.70.