Accumulation may be significant. Blowing Snow - wind driven snow that reduces visibility and causes significant drifting. Blizzard - winds over 35 mph with snow and blowing snow reducing visibility to near zero. Sleet Rain drops freeze into ice pellets before reaching the ground. Sleet usually bounces when it hits a surface and it does not stick to objects.
Sleet can accumulate like snow and cause a hazard to motorists.
Freezing Rain Rain that falls onto a surface with a temperature below freezing, causing it to freeze to trees, cars, and roads, forming a coating or glaze of ice. Even small accumulations of ice can cause a significant hazard.