Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsTom SchlatterWeatherwise Contributing Editor THOMAS SCHLATTER is a retired meteorologist and volunteer at NOAA's Earth System Research Laboratory in Boulder, Colorado. Submit queries to the author at weatherqueries@gmail.com, or by mail in care of Weatherwise, Taylor & Francis, 530 Walnut St., Suite 850, Philadelphia, PA 19106.I thank John M. Brown of NOAA's Earth System Research Laboratory for help in answering these questions.