Under what conditions can the wind make rolls of snow? Detailed answer

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Under what conditions can the wind make rolls of snow? Detailed answer

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Under what conditions can the wind make rolls of snow?

With a certain combination of environmental parameters, a rare meteorological phenomenon occurs when the wind rolls the snow into rolls. The accumulation of snow layers occurs like when building a snowman, only the rolls are usually cylindrical and often hollow inside. In order for a snow roll to begin to form, the ground must be covered with a crust of ice, the snow must be wet and loose, and the wind speed must be large enough to lift the snow.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

On what planes and why was a periscope installed?

The Soviet T-4 supersonic bomber was developed as an effective weapon against American aircraft carriers. When flying at an altitude of up to 24 km, he could reach a speed of 3000 km / h, so that enemy radar stations did not have time to direct an anti-aircraft missile at the aircraft. Such technical requirements required several extraordinary solutions from the designers, among which is a deflectable bow. At extreme altitudes and speeds, the nose was raised to reduce drag, and the pilot could only control the aircraft using instruments, but during takeoff and landing, the nose deviated and provided an overview. And in case of an emergency failure of the bow of the T-4, it was equipped with a periscope retractable above the cockpit.

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