Hi, All,
I have put three pics on the ultra slow (sorry-Orange’s fault) website
(pictures page) given by a friend of mine of a cloud “hole” he
photographed within a mile of Stamford, Lincolnshire, on Sunday 19th
October 0935Z. They are in sequence and pic 3 was taken from almost
underneath the hole about 20 minutes later.

http://copley.website.orange.co.uk

Clouds are not my strong point but my theory is that the hole was
formed by a jet passing through, exhaust evaporating the Sc sheet and
the saturated air mixing with the air below forming the trail.
Am I even close? Any ideas?
Ken
Copley, nr Barnard Castle, Teesdale

http://copley.website.orange.co.uk