Sunset over a tsunami of clouds - Slovenia

Thermical inversion is a meteorological phenomenon occuring when a layer of cold air is stuck near Earth surface by a layer of warmer air. It occurs frequently at the border between mountainous and lowland regions such as Slovenia and can last for weeks, hidding sunlight from people living below. Narrow remote valleys are normaly less prone than larger plains to such effects. However the propagation of this phenomenon looks more dramatic when it happen there, giving the impression that a tsunami of clouds is covering the area.