Although most of the United States enjoyed clear skies on April 19, 2006, North and South Dakota and sections of Montana and Wyoming were hammered with a late-spring snow storm. The storm dumped up to two feet (60 centimeters) of snow on the northwestern Plains, knocked out power in thousands of homes and businesses, and closed highways, reported the Associated Press. The storm was also blamed for four deaths, most of which occurred in a single accident on an ice-covered road. Sensor: Terra/MODIS. Data Start Date: 4/19/06.