Science Frontiers ONLINE No. 2: January 1978 Issue Contents

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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

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Science Frontiers Sourcebook Project Reviewed in: Icarus: Volume 41, Issue 3, p. 470-470 1984, Vol.56:3, P.615 1983, Vol.58:3 June 1984, Vol.60:3 Dec 1984, Vol.72:3 Dec 1987 Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 1987 American Journal of Physics, Volume 52, Issue 8, p. 764 August 1984 Quotes "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