snowpack
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The record

What the instruments said

Every hour we ask both instruments at all 63 mountains and keep what each one reported, including the hours they agree. Nothing is smoothed and nothing is dropped: a reading we could not use is kept with the reason written beside it.

The sweep

Reading the record.
24 hours agothe last full hour

An hour the sweep ran leaves rows here and an hour it did not leaves nothing, so this count is measured rather than reported. The hour in progress is drawn hatched and is not counted against the window.

Mountains in the record

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