@classmethod
def filter_stations(cls, stations):
    """Get the GHCN stations that are also in the EECRA dataset

        Parameters
        ----------
        stations: np.ndarray
            A string array with stations to use

        Returns
        -------
        np.ndarray
            The ids in `stations` that can be mapped to the eecra dataset"""
    return cls.eecra_ghcn_map().loc[stations].dropna().index.values
