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I need to visualize the snowfall in the USA for a given time period and city. So you could pick a given day and get a heatmap showing the amount of snowfall at each place in the USA on that day. Monthly or seasonal snowfall isn't granular enough for this application.

Does anyone know where I could get data like this? (Ideally it would already be hooked up to a map so I can explore the data before building the whole thing myself.)

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up vote 7 down vote accepted

NOAA's National Operational Hydrologic Remote Sensing Center has an interesting daily snowfall dataset. Their daily archive is in KML format and goes back to 2005.

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