ALLISTER AALDERS: The science behind snow rollers | SaltWire

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ALLISTER AALDERS: The science behind snow rollers | SaltWire
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Given the specific conditions required, snow rollers are considered a rare meteorological phenomenon.

Jane Adams captured these rare snow rollers in Cape George, N.S., which required specific conditions to form.While I enjoy the challenges of forecasting our weather each day, witnessing and learning more about different weather phenomena has to be one of my favourite parts.

A snow roller is essentially a patch of snow that gets rolled up over time – like a snowball but, in this case, forming a cylindrical shape with no help from a human. You first need the ground or a surface to have a layer of ice with wet or sticky snow accumulating on top of that layer.

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