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You can use watercolour to draw it, because it is the most economical medium for paining snow scenes .As you can leave some areas of white paper to represent the lightest light .Model the contours in the snow with pale washes of blues, grays and yellows.Use straight lines & hard edges where the snow is fresh & clean ;Indicate patches of melting snow by using scrubby dry brush strokes to represent the earth peeping through.

In transparent watercolour you have to establish the position of the brightest highlights on the snow in advance & paint around them .Or you can try working on a toned paper and adding body colour to the colours .The slight chalkiness of white renders the appropriate powdery effect of snow.