August is still monsoon season in Arizona, and we saw plenty of thunderstorms in seven days on the road. This was taken from 89A, about 15 miles south of the Navajo Bridge over the Colorado River, at 11:30 in the morning. Midday shooting is usually awful, but weather makes its own light.

I drove wearing polarized sunglasses, even when there was no sun, because I had forgotten my normal glasses. Serendipitous, because the polarizer is what made the column of rain visible — neither my wife nor daughter noticed it. My first shot without a polarizing filter failed to capture it.