The last weekend of November 2013, witnessed a rare weather phenomenon at the Grand Canyon in Arizona.

Known as “temperature inversion,” it’s an event that occurs approximately every 10 years. The entire canyon was filled with fog. To make the scene, even more dramatic, the skies above were bright and cloudless.

A ‘temperature inversion’ occurs when warm air acts like a lid and seals the cool air below.   Condensation takes place as the warmer air cools and forms fog, that is  trapped in the canyon by the heavier cooler air.

Park Ranger Erin Whittaker who took many of the dramatic images featured below, told the Daily Mail that temperature inversions occur once or twice a year, though only fill up select areas of the Canyon.

To see more of these stunning images,  check out Grand Canyon National Park on Facebook.

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook

Photograph by Erin Whittaker/National Parks Service
via Grand Canyon National Park on Facebook