Clouds Arches/Vortex ?

I took these cloud images last year, they were all taken over the space of about 30 minutes. There was a very strong wind blowing and some clouds seem to forming in the shape of Arches. It was a really strange phenomena the arches seem to be created then roll across the sky towards me before dissipating.

Below shows the detail of one of the arches.

This image shown more examples taken slightly later.

Here are a couple that were much closer ..... the top one was dissipating.

This shows a broader picture where the arch shape could be seen in a lot of places.