On the 10th October 2016 a sheet of stratiform cloud was producing
fall-streak holes over southern UK. Howerver, holes developed in certain
parts of the sheet only. An analysis of the available data indicates that
the cloud was at a height near 25000 ft, and at a temperature of -31 C, and
its unusually cold temperature holds the key to the unusual nature of this
cloud.

http://www.woksat.info/wwp/cloud-161010-final.pdf



--
Bernard Burton

Satellite images and weather data for Wokingham at:
www.woksat.info/wwp.html



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