They could be cumulus clouds moulded by unusual wind patterns, it would be intereting to know which way the wind was up there.
The shapes hint at right to left of the picture.
The clouds do hint at lenticular and you can see them on the top of each other, but often they are seen with a gap between the two.
The id problems come from the stratoform clouds above these shapes.
Any idea what the height it became OVC?
If you have a few hours to kill, trawl through the thousands of cloud photos at:
The Cloud Appreciation Society
