Last evening an unusual cloud phenomenon- (similar to the cloud effects of that rhapsodic year of 1915, when I was continually overwhelmed by the power and beauty of the heavens)- a long narrow mass of heavy cumulus clouds extending from the west to the east, dividing the sky almost into two equal parts. The edges of the cloud tops to the north were lit up by the sun, brilliantly white and constantly swelling rapidly and changing shape as if inflating from within. The ragged edges of the overhead clouds, seethed and writhed ominously, like an invented sea, and were tinged with an eerie cold blue light. It had the feeling of an enormous cavern, with the clouds as the ceiling and the earth as the floor, a cavern such as never had existed. When at last the serpentine line came to the end and the sun burst forth, the whole group turned suddenly blue-black, with bright houses & trees standing out sharply against it.
Charles E. Burchfield, Journals, July 26, 1936