Sara Driscoll (Member 52,230) spotted this sky over Marchwood, Hampshire, England while out with her toddler. The underside of a passing Cumulonimbus storm cloud revealed a striking display of mamma cloud features. These are rounded, pouch-like formations that hang from the underside of a cloud layer, the most dramatic like these being found beneath the spreading canopy of storms.

The features form as cooling air within the cloud sinks in pockets that cause downward bulges to descend from the base. On storm clouds like this, they tend to appear to the rear of the storm, after the showers have passed. What started as a toddler-dash from a seemingly approaching shower turned into a moment of wonder. After she pointed out the mamma features, Sara found her son delighting in them too, joyfully calling ‘mama clouds!’ all the way home. Potential new member right there.