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No. 2: January 1978

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The Morning Glory

The Morning Glory is a spectacular roll cloud that frequently sweeps in low over Australia's Gulf of Carpenteria, often around sunrise in clear, calm weather. The cloud is only 100-200 m thick but very long and straight, extending from one horizon to the other. (One pilot followed if for 120 km without finding its end.) Sometimes as low as 50 m, the Morning Glory brings squall-like winds but rarely more than a fine mist. Double Morning Glories are not uncommon. Sev-en were once reported. Oriented NNW to SSE in the main, they advance east-towest low and fast (30-50 mph). Convincing explanations are wanting. One meteorologist has proposed that the Morning Glory is a "propagating undular hydraulic jump."

(Neal, A.B., et al; "The Morning Glory," Weather, 32:176, 1977.)

From Science Frontiers #2, January 1978. 1978-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:


  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987