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The MADIS observation data is stored in Zarr files, which can be opened using the Xarray library.

The observations for a specific hour YYYY-MM-DD HH:00 are stored in the file madis2020/MM/(mesonet|metar)/YYYYMMDD_HH00.zarr.

Each Zarr file has the following variables:

  • temperature
  • dewpoint
  • windSpeed
  • precip6Hour (available only in the METAR files)

Each variable has a corresponding quality control variable:

  • temperatureDD
  • dewpointDD
  • windSpeedDD
  • precip6HourDD

Lastly, the dataset contains two variables latitue and longitude` that specify where the observation was taken.

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