Wave clouds were seen above Christchurch airport. Photo: NZ HeraldWaves looked like they were breaking in the sky above Christchurch Airport last night in the second "wave cloud" formation spotted in as many weeks around the country. Just under two weeks ago similar wave clouds were spotted in Palmerston North, causing what MetService meteorologist Tuporo Marsters said was the best example of Kelvin-Helmholtz waves he'd ever seen. In this case here the ridge was pretty stable yesterday evening, and so the westerly breeze has captured those clouds and scooped them." The same pattern was spotted in Palmerston North two weeks ago.

Source: Otago Daily Times March 04, 2017 04:34 UTC