from Tucson News Now

Grand Canyon filled with fog, spectacular photos

By Erin Jordan

click to open full-size photo

A ‘Temperature Inversion’ was responsible for this awesome sight.

Cold air was locked up in the Grand Canyon with warm air sitting above it.

The warm air acts like a lid, locking the cold air in the canyon and preventing movement and mixing between the two air masses.

The chilly air in the canyon cooled to the dew point and clouds formed, filling the canyon with fog.

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