A protective structure erected over railroad tracks to prevent deep snow from accumulating on the tracks. They are used in deep cuts in mountains where avalanches are common.
A brief period of snowfall in which intensity can be variable and may change rapidly. A snow shower in which only light snow falls for a few minutes is typically called a snow flurry.
A snow squall is an intense, but limited duration, period of moderate to heavy snowfall, accompanied by strong, gusty surface winds and possibly lightning (generally moderate to heavy snow showers). S
now accumulation may be significant.
A warning issued by Environment Canada's Meteorological Service (MSC) for localized, limited duration, intense snowfall that reduces visibility significantly and may be accompanied by strong, gusty wi
nds and (in some cases) lightning. These weather conditions are produced by the passage of cold air over an open body of water (open water squall) or the passage of a cold front (frontal snow squall). Local snow accumulations may be significant during this type of event.
Part of an obsolete conceptual model of air parcel ascent referring to conditions under which the condensation level is at a temperature below freezing and it is assumed that all condensed vapor immed
iately freezes. Other portions of the ascent were described as the dry stage, the rain stage, and the hail stage.
Phase of an adiabatic expansion process during which the ascending saturated air condenses some of its water vapour directly into snow. The snow stage begins at the condensation level if it is situate
d above the freezing level.
A wooden scale, calibrated in inches or centimeters, used in regions of deep snow to measure its depth. (Also called snow scale.) The scale is bolted to a wood post or angle iron set in the ground.