Wildfire smoke very bad with visibility down to one or two miles. This caused by a temperature inversion which trapped the smoke producing greenhouse conditions resulting in higher than normal pressure altitude. The resultant degradation in performance is illustrated by this jet at only about 50 feet after using 5000 feet of runway.

This photo is copyright © Tim Martin, and may not be used or published in any way without permission.

It was added on 8 March 2020, and has since been viewed 111 times.