What characterizes blowing snow compared to low drifting snow?

Blowing snow is characterized by being lifted by the wind to heights of 6 feet or greater, which distinguishes it from low drifting snow. The significant elevation of blowing snow occurs due to wind speeds that are strong enough to displace snow particles from the ground into the air. This phenomenon can greatly affect visibility and create hazardous conditions, particularly for aviation and road travel.

In contrast, low drifting snow typically refers to light snow that is moved horizontally by lighter winds and remains close to the ground. This distinction in the height that snow particles reach under windy conditions is crucial for meteorologists and those involved in weather observation, as it impacts how various types of snow affect travel and weather conditions.

The other characteristics mentioned are either related but do not specifically define blowing snow. For instance, while blowing snow can reduce visibility, the threshold mentioned (under 7 miles) doesn't uniquely apply to blowing snow alone, as other forms of snow can also cause low visibility. Similarly, the presence of ice crystals may be found in various types of snow and does not directly define blowing snow.