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Asperatus?

Posted: Sun Sep 18, 2016 1:54 pm
by John Wilson
I witnessed this cloud formation yesterday Saturday 17th September 2016 at 10.15UTC here at Arnold, Nottinghamshire, looking NW. The cloud formation was visible for a couple of hours or so. Are they the 'new' Asperatus type? I would appreciate the views of those with greater knowledge than mine.
Regards to all
John

Re: Asperatus?

Posted: Sun Sep 18, 2016 2:14 pm
by Len Wood
Yes John, it looks like asperatus or asperatis as some have called it.
It is a bit controversial because there is a perfectly good name for it already:

mammatus undulatus would fit well into the present WMO classification.

Re: Asperatus?

Posted: Sun Sep 18, 2016 4:42 pm
by John Wilson
Thank you Len. Nice to see something a bit rare or new in this neck of the woods.
All the best
John

Re: Asperatus?

Posted: Sun Sep 18, 2016 7:54 pm
by Nicholas Gardner
Asperatis cloud I took a photo of a few years back (see attached image):
May6thasperitas.jpg
May6thasperitas.jpg (27.12 KiB) Viewed 19360 times

Re: Asperatus?

Posted: Mon Sep 19, 2016 8:11 am
by Martin Rowley
... I wouldn't be calling that cloud (as in original post) as anything other than Sc stratiformis opacus undulatus. Not even mammatus (from that shot - but photos can be notoriously deceptive).

Asperatus/Asperatis has a much more "tortured"/intorted look about it . . . see examples here:-

http://cloudappreciationsociety.org/asp ... nt-page-2/

Martin.