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Credits
The public data and the volunteers behind every number.
Where the numbers come from
- NOAA MRMSRadar estimates for rain and liquid. NOAA National Severe Storms Laboratory, Multi-Radar Multi-Sensor.
- NOAA NOHRSCSnowfall analysis for new snow. NOAA National Operational Hydrologic Remote Sensing Center.
- NOAA GHCN-DailyStation records for the rank line, the comparison with normal and past seasons. NOAA National Centers for Environmental Information.
- U.S. Census BureauTown names, locations, boundaries and populations.
- CoCoRaHS volunteersVolunteer gauge reports: CoCoRaHS (cocorahs.org), CC BY 3.0. Thank you to every volunteer who reads a gauge at 7 AM.
- NewsreaderThe typeface for numbers and headings, used under the SIL Open Font License. A copy of the license is served with the font files.
What we change
We add up the NOAA grids for the spot where each town sits and round to two decimals for rain and liquid and one for snow. We do not edit volunteer gauge readings. The maps are images we draw from the NOAA data; no map tiles from other services.