> I have the same feeling that these are not very uncommon The article explicitly states the rarity is at the given latitude: “Such clouds are very rare at th

> I have the same feeling that these are not very uncommon The article explicitly states the rarity is at the given latitude: “Such clouds are very rare at this latitude and also in winter…” Naturally they chose to over-emphasize the rarity aspect in the headline, otherwise no-one would bother clicking.