The Grand Canyon was looking a bit under the weather, literally, after a temperature inversion caused clouds to settle inside the canyon's rim on Wednesday.
A layer of low-lying clouds produced the spectacular sight, and turned the canyon into a sea of clouds. Thirty minutes of cloud movement is sped up in this time-lapse footage, above, recorded at Hopi Point on the South Rim of the Grand Canyon.
The weather phenomenon is spotted at the Grand Canyon every few months, but the last time it occurred was just six weeks ago on Dec. 11.