Cloud waterfall

This ‘cloud waterfall’ shrouding the Flinders Ranges in the early morning is an orographic cloud, formed by moist air being forced up over a mountain range. As the air rises, it cools and condenses into a long, continuous cloud bank that hugs the terrain.

Vapour trail

Vapour trails, or contrails, are high altitude linear clouds generated by engine exhaust or changes in air pressure from aircraft flight paths, composed primarily of ice crystals. Seen here crossing the path of a waning crescent moon during a colourful Flinders Ranges dawn in autumn.