It wasn’t the best I had seen, but this display of haloes in the direction of Nelson was better than any I had seen for a few years. I was alerted to it by the sight of a circumzenithal arc high over a rooftop, but then grabbed my camera and found a better view of the western sky.
The circumzenithal arc appears high in the sky when the Sun is low. It is concave up as befits its name: it being a (portion of a) circle centred on the zenith. Below the circumzenithal is the supralateral tangential arc to the 46° halo. It is fainter and is concave down. When the Sun is about 23° above the horizon, the two arcs touch, at which time the colours of the circumzenithal are superb (better than those of a rainbow). When this picture was taken, the Sun was only about 14° above the horizon, the arcs have moved apart and the colours lack the earlier purity.
With a better view, more details emerged. In addition to the mentioned arcs there are other faint features: a 22° halo, a sun pillar, a Lowitz arc and crepuscular rays. Not all that shabby.