Arlene Rosenthal, of Columbia, spotted a puzzling item in the Post about a 21-inch snowfall in Texas in 1934. "Most of it melted shortly after reaching the ground," the story said. "Actual snow depth never exceeded 5 inches." If it melted that fast, Arlene asks, "how was the total of 21 inches obtained?" Do I really look that old? Today, snow is measured on a white plywood surface, cleared and remeasured every six hours. Perhaps more-frequent observations inflated the measured depth, while accumulations nearby melted and compressed.