Download French JPEG through HTTP (English, French, JPG)

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Publisher-reported update

2017-01-26

The map shows the mean maximum depth of snow in centimetres, the standard deviation of the mean maximum depth of snow, and the mean date of mean maximum depth of snow. The information shown on the map is compiled from 1961 – 1970 snow course data in conjunction with 1955 – 1972 snow depth data. An appreciation of the quantity of snow in storage within a drainage basin during late winter is critical to spring flood forecasting. As well, decisions regarding overland transport and wildlife control can be rationally taken. Snow courses have been established to estimate regional snow depth and water equivalent, but the cover is also measured by all principal meteorological stations and by many climatological stations. The depth is measured either by inserting a graduated probe in a relatively drift-free area or by recording the height of the snow indicated by a stationary object such as a stake positioned in the ground prior to snow accumulation. Since the snow surface is irregular in most areas because of drifting, terrain configuration and forest effects, several measurements are usually required before an average can be estimated. The regularly operated snow course located in a…

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