Asperatus?

This forum is for discussing and posting observations of short term weather events that have taken place within the last few days. It could include details of thunderstorms, snow, rainfall, hail, temperatures, etc. Please create a thread for the day, or add your comment to the existing thread if it is related to previous comments there.
Post Reply
User avatar
John Wilson
Posts: 13
Joined: Sat Dec 12, 2015 8:40 pm
Location: Mapperley Plains, Arnold, Notts.

Asperatus?

Post by John Wilson » Sun Sep 18, 2016 1:54 pm

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
Attachments
asperatus.jpg
asperatus.jpg (14.61 KiB) Viewed 19380 times

User avatar
Len Wood
Posts: 102
Joined: Sat Dec 12, 2015 8:41 pm
Location: 1 km from coast in Wembury, SW Devon

Re: Asperatus?

Post by Len Wood » Sun Sep 18, 2016 2:14 pm

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.
Len
Wembury, SW Devon coast

83 m amsl

User avatar
John Wilson
Posts: 13
Joined: Sat Dec 12, 2015 8:40 pm
Location: Mapperley Plains, Arnold, Notts.

Re: Asperatus?

Post by John Wilson » Sun Sep 18, 2016 4:42 pm

Thank you Len. Nice to see something a bit rare or new in this neck of the woods.
All the best
John

User avatar
Nicholas Gardner
Posts: 107
Joined: Sat Dec 12, 2015 8:11 pm
Location: Rural riverside valley location near the village of Newton Poppleford and 2 km from the sea.
Contact:

Re: Asperatus?

Post by Nicholas Gardner » Sun Sep 18, 2016 7:54 pm

Asperatis cloud I took a photo of a few years back (see attached image):
May6thasperitas.jpg
May6thasperitas.jpg (27.12 KiB) Viewed 19366 times
Otter Valley Weather
Near Newton Poppleford, Sidmouth - Devon
50:41N 3:17 W; 20 metres AMSL; Station Grade B-BAAA37
http://www.ottervalleyweather.me.uk

User avatar
Martin Rowley
Posts: 34
Joined: Sat Dec 12, 2015 8:32 pm
Location: West Moors, East Dorset

Re: Asperatus?

Post by Martin Rowley » Mon Sep 19, 2016 8:11 am

... 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.
Martin Rowley
West Moors, East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall/TRSHEUN=CC-A03-

Post Reply