In message , Bernard Burton
writes
Norman and others,
The cloud formation is entirely man made, and consists of 'bundles'
ofcontrails in a fairly strong anticyclonic shear. Playing an IR animation
shows individual trails forming as the older ones rotate anticyclonically.
The first trails appeared near 04z as the overnight pond hoppers headed for
Europe. A nice visual example of vorticity.

--
Bernard Burton
Wokingham, Berkshire, UK.




Bernard,

Yes, as you can see from another post I had reached the same conclusion
that the formation originated as contrails. I suppose each "bundle" is a
visual indication of an individual trans-atlantic track being used this
morning. As you say, a nice visual example of vorticity. It's certainly
something I've never seen before.

Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England