Etymology
From earlier snow-storm, snow storm, equivalent to snow + storm. Compare Scots snawstorm (“snowstorm”), Saterland Frisian Sneestoarm (“snowstorm”), West Frisian sniestoarm (“snowstorm”), Dutch sneeuwstorm (“snowstorm”), German Low German Sneestorm (“snowstorm”), German Schneesturm (“snowstorm”), Danish snestorm (“snowstorm”), Swedish snöstorm (“snowstorm”), Icelandic snjóstormur (“snowstorm”). Compare also Middle English storm of snow (“snowstorm”).