Drifting Snow
(Section 3.2.1.3.1)Definition: Drifting snow: An ensemble of snow particles raised by the wind to small heights above the ground.
The motion of the snow particles is more or less parallel to the ground. Drifting snow may obscure very low obstacles. Neither vertical visibility, nor horizontal visibility at eye level (defined as 1.80 m above the ground) is noticeably diminished.