It all started when a picture by Jane Wiggins of Cedar Rapids Iowa, went viral on the net in 2006. Since then, weather buffs around the globe have taken their own snap shots and are hoping to formally get it recognized.
This new recognition may be worthy, but it may take some time. The president of the Cloud Appreciation Society, Gavin Pretor-Pinney, says,"the last time they did a new edition of the book was in 1975."
I have seen these clouds in Minnesota as warm air overruns colder air, almost acting as a blanket. All we can do now is wait and see if WMO will include it in their next reference book update, whenever that may be.