Was it an Ice Halo? I think this seems more than likely, the sky was clear except for some very thin wispy cloud, which according to the Cloud appreciation site is a snowfall at high altitude, Cloud of the month – Virga I was looking at the Spaceweather.com website and they just happen to have a feature on Ice Halos
The pics might not stay there long but more can be found about Ice Halos Here
Maybe it was a Sun Dog!
Edit: I think it must have been a Circumzenithal Arc
The angle of the sun which was low to the west (to the left in the pic) and the halo’s placement at the zenith would suggest that.