Andrea Hamer (Member 65,655) could see a storm was brewing in the north as she looked up from her front gate in Tarrawarra, Victoria, Australia. The low, clumpy layer of cloud known as Stratocumulus was churning like a turbulent, stormy sea. That was because, off in the distance, mostly hidden from view, a mighty storm cloud known as Cumulonimbus was hurling down heavy showers and stirring the atmosphere as it did so.

Andrea found beauty in this chaos of air and water. Can you find a subtle breaking-wave shape hidden in the upper middle of her cloud? Known as a fluctus, this curled cloud feature formed in the intense wind shear that can occur around Cumulonimbus storm clouds. A fluctus like this lasts no more than a minute or so before it’s lost into the restless, roiling cauldron of the sky.