The Cloud Appreciation Society's cloud of the month photo for June shows a Cumulonimbus storm cloud exhibiting glorious Mamma clouds (sometimes known as Mammatus). These pouches of cloud sometimes hang down like this from the underside of the enormous canopy that spreads outwards at the top of these huge storm clouds, giving them their anvil shape. The name Mamma comes from the Latin for udders. It is not hard to see why.  

Text and photo from the Newsletter of The Cloud Appreciation Society which has 26,887 members in 89 countries around the world.  

 © Ian Loxley.

Dawn breaks near Blackall, Queensland, Australia.

Spotted from Captain John's office window while flying at 35,000 feet from Dublin to Spain.

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