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  "limitations": [
    "Previous-Runs API fixed 24/72/168h offsets, not a single issuance held throughout a local day.",
    "Daily extrema calculated from complete hourly forecasts vs station-reported daily extrema.",
    "Precipitation accumulated over preceding hours, full Europe/Athens local days; DST 23/25h handled and incomplete days excluded.",
    "All model inputs at requested elevation 380m; previous files reused, zero new API calls.",
    "This evaluation year was studied previously: it is not a newly untouched independent holdout. No tuning was promoted to production.",
    "Station gauge totals are not independent snowfall measurements. Snow depth accuracy cannot be calculated from these inputs.",
    "GFS here is Open-Meteo processed GFS; performance is not interchangeable with direct 0.5 degree /6h GFS backup."
  ]
}