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Meteorologists measure three things, says Dr. Moran: "The depth of snow that falls between successive observations, the meltwater equivalent of that snowfall and the depth of snow on the ground at observation time." Dr. Moran tells us how to measure a storm's snowfall like the experts. "Prior to an anticipated snowfall, place a simple wooden board on the ground.…New snowfall accumulates on the board, and at observation time a ruler is used to measure the snow depth to the board. Record the snowfall…and sweep the snowboard clean so that it is ready to receive new snowfall. Repeat this process throughout the snow event, and then compare your total snowfall with that reported by the local television or broadcast meteorologist. Note that snowfall is notoriously variable from one place to another with considerable differences within the District and across Northern Virginia and adjacent Maryland." These differences depend upon things like temperature, the distance you are from the ocean and the track of the storm, he says.

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17y ago

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