Space doesn't allow a full recounting, but two earlier Storm Track articles detailed three different encounters with tornadic like roaring sounds from high within CBs. No tornado was present with any of them! The first account by the Editor ST, Vol. 2, No. 6) discussed a May 22, 1968 storm cell about 12-14 miles west of Caldwell, Kansas. About 4 miles west of me was a rainfree CB base with an apparent hole in the middle, rotating cyclonically. Daylight appeared through the hole, with very dark and solid base surrounding it. A powerful, deep roar was heard that continued for several minutes, without oscillation or interruption. The earliest, tornadoes occurred 7 and 18 minutes later and 25 miles NE of this location! The other two reports were written up by Charles A. Doswell, III in a later newsletter (ST, Vol. 4, No. 2). In both instances (May 30, 1976 near Jacksboro, Texas and May 28, 1977 in western Oklahoma), somewhat isolated and dissipating CBs produced roaring sounds without tornadoes. "The storm was of the 'dryline' type ... very small ... appeared to be rotating anticyclonically. ...we heard a steady, muted roaring sound. As nearly as we could tell from a distance of about 3-5 miles to its NE, the sound was coming from the storm's anvil, near where the storm tower joined it from below." The May 28 storm was very similar, except that it rotated cyclonically. "Once again, the sound seemed to originate high up in the anvil, near the point where the storm's tower joined it."