Upward Cloud Shadow
The view is from downtown Kansas City. An isolated pair of towering cumulus clouds were in south-central Nebraska, over 200 miles to the NW, unseen over the horizon. I only knew of them by examining satellite imagery; but those distant towers cast a striking shadow up onto the bottom of a veil of tufty, wavy cirrostratus at sunset.
Kansas City MO (Jul 94) looking WNW.