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A wooden ruler plunged into white flakes accumulating on his snow board — an old freezer door affixed to legs of plastic piping and wood — showed two inches.

You’ll want to make sure the snow board is not close to obstacles that may interfere with the snowfall.

Official measurements logged into the National Weather Service records are typically done with a snow board — basically a square piece of wood, placed flat on the ground.

The snow board standard is to measure once every six hours, then clear it to allow new accumulation, then sum each measurement.

The Washington Post learned that the weather observer at the airport lost the snow board during the storm and that the final number simply reflected the amount on the ground when the storm was over, rather than the sum of six-hour snow board measurements.