30+ Natural Phenomena That Actually Exist. A Couple Of These Will Haunt Your Dreams

Dirty thunderstorms

The flowers bloom in the Atacama Desert, Chile, in years when rainfall is unusually high. Normally the region receives less than 12mm of rain annually.

Circumhorizontal arcs

Circumhorizontal arcs

Misleadingly known as fire rainbows, this is an optical phenomenon featuring an ice halo formed by plate-shaped ice crystals in high level cirrus clouds.

Lenticular clouds over Mount Olympus

Lenticular clouds over Mount Olympus

Stationary lens-shaped clouds form in the troposphere. Because of their shape, they have been offered as an explanation for some UFO sightings.

Breast clouds

Breast clouds

Also known as mammary clouds or mammatus clouds, the clouds show a rare pattern of pouches hanging underneath the base.

Polar stratospheric clouds

Polar stratospheric clouds

These are also known as nacreous clouds (from nacre, or mother of pearl, due to their iridescence).

Undulatus asperatus aka “roughened or agitated waves”

Undulatus asperatus aka “roughened or agitated waves”

This cloud formation has been proposed as a separate cloud classification by the founder of the Cloud Appreciation Society and would be the first new type of cloud recognised since 1951.

Lake Natron in Tanzania

Lake Natron in Tanzania