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Packed powder – Powder snow that has been compressed by grooming or by ski traffic. Powder – Freshly fallen, uncompacted snow. The density and moisture content of powder snow can vary widely; snowfall in coastal regions and areas with higher humidity is usually heavier than a similar depth of snowfall in an arid or continental region.
A powder snow avalanche is a type of avalanche where snow grains are largely or completely suspended and moved by air in a state of fluid turbulence. They are particle-laden gravity currents [ 1 ] and closely related to turbidity currents , pyroclastic flows from volcanoes and dust storms in the desert.
[10] [11] Powder skis use a design with wide tips and shorter tail lengths. [12] Powder skis typically feature wide tips, ranging from 140 to 155 millimeters. The tails are slightly more tapered, often within a 125- to 140-millimeter range. This design helps powder skis remain buoyant in snow. The contours and proportions of a ski's tip, waist ...
Visual snow as a temporary occurrence under certain conditions is normal and doesn't require intervention. [citation needed] Visual snow syndrome is a pathological condition, where visual disturbances persist constantly and may be caused by issues in the visual or nervous system, requiring medical attention. [citation needed]
A powder snow avalanche. An avalanche (also called a snowslide or snowslip) is a rapid flow of snow down a sloping surface. Avalanches are typically triggered in a starting zone from a mechanical failure in the snowpack (slab avalanche) when the forces on the snow exceed its strength but sometimes only with gradually widening (loose snow ...
As new snow fell, the melt-crust became unstable because of the ever increasing weight of the snow on top. On 23 February at 15:59, the melt-crust failed; the resulting powder avalanche contained a central layer of which scientists were unaware. Known as the saltation layer, it was primarily responsible for the destruction of buildings. As the ...
Whiteout in Saskatchewan (March 2007) Whiteout snow squall northwest of Waterloo, Ontario, Canada (February 27, 2014) Background shows large, stationary whiteout on Lyell Icefield that lasted 4 hours Whiteout or white-out [ 1 ] is a weather condition in which visibility and contrast are severely reduced by snow , fog , or sand .
Falling diamond dust (Inari, Finland) Diamond dust is similar to fog in that it is a cloud based at the surface; however, it differs from fog in two main ways. Generally fog refers to a cloud composed of liquid water (the term ice fog usually refers to a fog that formed as liquid water and then froze, and frequently seems to occur in valleys with airborne pollution such as Fairbanks, Alaska ...