Blowing Snow
(Section 3.2.1.3.1)Definition: Blowing snow: An ensemble of snow particles raised by the wind to moderate or great heights above the ground.
The concentration of the snow particles is sometimes sufficient to veil the sky and even the Sun. The snow particles are nearly always violently stirred up by the wind.
Vertical visibility is diminished according to the intensity of the phenomenon. Horizontal visibility at eye level is generally very poor, where eye level is defined as 1.80 m above the ground. When the phenomenon is severe, it is difficult to determine if precipitation in the form of snow is also present at the same time.