Jonathan Crowe

My Correct Views on Everything

Mammatus Clouds

Mammutus clouds over Squaw Valley (Matt Saal)

I have recently become interested in unusual cloud formations, like noctilucent and lenticular clouds, and the atmospheric manifestations of Kelvin-Helmholtz instability. Now I have to add another one to the list: mammatus clouds, whose undersides are not round but are rather, um, boob-like. (Es verdád! Hence the name!) This image of mammutus clouds over Squaw Valley, taken by Matt Saal, was yesterday’s APOD. (Creative Commons licence.)