{
  "created": "2026-10-14T15:56:16.483006+00:00",
  "status": "Post hoc diagnostic proposed after inspecting raw common-cohort results. Chronological calibration split does not undo that prior exposure. No claim of confirmatory significance.",
  "code_sha256": "d226e1085b2c32deb59e076869afd3fd515c82219490d18af044d36a5bb6954b",
  "calibration_origins": [
    "2026-06-08",
    "2026-06-15",
    "2026-06-22",
    "2026-06-29",
    "2026-07-06",
    "2026-07-13",
    "2026-07-20",
    "2026-07-27"
  ],
  "evaluation_origins": [
    "2026-08-03",
    "2026-08-10",
    "2026-08-17",
    "2026-08-24",
    "2026-08-31",
    "2026-09-07",
    "2026-09-14",
    "2026-09-21"
  ],
  "offset_degrees_C": {
    "WeatherNext 2 archive": [
      0.10558035714285698,
      0.4552827380952383,
      4.383258928571428
    ],
    "ECMWF IFS archive": [
      1.8281249999999996,
      0.5205357142857145,
      4.819642857142858
    ]
  },
  "method": "One additive mean error offset per site, pooled across leads and the first 8 weeks. Same rule for both NWP services. Prespecified 50:50 calibrated WeatherNext/PINN blend. No fitted blend weights or hyperparameter search."
}