(WLUK) -- Friday's late afternoon skies featured a unique, eye-catching cloud formation. FOX 11 viewers from across Northeast Wisconsin submitted pictures of the peculiar straight-line clouds.

painting the atmosphere with their unique and transient shapes. But every now and then, a storm comes along that challenges our understanding of these fluffy phenomena, crafting cloud formations ...

These are nimbostratus. There are a number of other unique and beautiful cloud types that can form as air rises over mountain slopes and other topographical features. Lenticular clouds ...