{
  "schema": "mountain-weather-public-verification-v1",
  "reviewed_on": "2026-09-06",
  "status": "development_replay",
  "as_issued_results_published": false,
  "replay": {
    "station": "Cairn Gorm summit",
    "elevation_m": 1245,
    "start_date": "2026-07-07",
    "end_date": "2026-08-05",
    "rechecked_on": "2026-09-05",
    "matched_sample_hours": 642,
    "usable_dates": 29,
    "mean_wind": {"mae_mph": 4.71755413560246, "bias_mph": -0.17710807220088326, "correlation": 0.896986613368843},
    "gust": {"mae_mph": 5.987621950421217, "bias_mph": 1.1706065023590444, "correlation": 0.8959062208752715},
    "basis": "Mast-equivalent summit calculation replayed over retained inputs, before walker-height adjustment.",
    "quality_filter": "Both station samples within the hour must pass quality checks; conflicting duplicate timestamps are excluded.",
    "limits": [
      "Development-period replay, not forecasts as originally issued at known lead times.",
      "Sampled conditions within each hour, not continuous full-hour observations.",
      "One summit in summer, not UK-wide, winter or walker-height validation.",
      "Strong and westerly winds were more often underestimated.",
      "Correlation is not percentage accuracy."
    ]
  }
}