Infrasonic undulations

…would be a good name for a band, I reckon.

That aside, it nearly beggars belief that ‘chemtrail’ believer William Remi has lived in Canterbury for any amount of time without ever having seen lenticular clouds. But, apparently, this is the case.

Lenticular clouds

William even goes on to say that the clouds formed on a day when Canterbury’s fabled Nor’wester was blowing, the classic conditions in which this phenomenon most commonly occurs (see here and here for the science, and MetVUW has lots of photos of it in their excellent gallery archives).