"Mike Tullett" wrote in message
...
After a totally clear start here, a line of cloud developed over
Coleraine,
with a base around 9000ft and extending up to cirrus levels.

http://www.mikett.plus.com/waves/DSC00006.JPG

It wouldn't be recognised by a glider pilot as a wave cloud. I would
suspect (without much information to go on though) that it is more likely to
be associated with a jet stream.

Jack