A tidal wave of heavy, packed snow, plowed onto your driveway by a city snow plow truck, and usually just shortly after you have spent a couple of hours shovelling out your driveway by hand.
Man, that city public works dude almost buried my Honda with a snownami...
A mixture of snow, water, and ice, caused by a tsunami hitting cold winds in a city. Creates added pressure to the water and is exponentially more lethal
The recent snownami brokedoors and killed 15 people