thump snow
n.— «In the areas that will get clobbered by all snow with the lead dog, it is really going to be what we affectionately refer to as a “thump” snow. In other words, the vertical motion associated with the surface storm, the thermal advection, and the overall uplift provided by the attendant upper-level feature, will bring the snow in and quickly raise it to a boil with snow accumulation rates of 1 to 2 inches per hour.» —“‘Twas the Week Before Christmas…“ by Joe Lundberg AccuWeather.com Dec. 19, 2008. (source: Double-Tongued Dictionary)