After a largely sunny day, high cloud began to approach Coleraine from the
NW in the late afternoon. Here are a few showing contrails, distrails (I
think they were), contrail shadows and the 22 degree halo.

http://www.mtullett.plus.com/17-may-2004/

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Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 17/05/2004 19:48:29 UTC