The article analyzes critically all cases of striped cirrus seen at Manila during the author's second Cloud Year, March 16th, 1946 to March 15th, 1947. The data favor the following conclusions: (a) Striped cirrus usually arise from the so-called false cirrus tops of cumulonimbus, strung out into lines by a strong upper air stream, (b) Striped cirrus at Manila are usually of forecasting value only if the typhoon or depression is to Manila's E-SE and the storm is moving W–WNW. (c) Great prudence should attend their use, since they may arise from any types of frontal or orographic disturbances apart from any typhoon whatsoever.

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Footnotes

* c/o Rev. Leo Cullum, 2913 Calle Herran, Manila. P. I.