{
  "forecast_id": "to_fcst_20260425_1439",
  "hazard": "tornado",
  "issued_at": "2026-04-25T14:39:07Z",
  "model_version": "tornado_storm_v1_0",
  "forecast_horizon_hours": 24,
  "scoring_tier": "tier3_ps_only",
  "scoring_tier_label": "ProbSevere-only fallback (no ML, no HRRR)",
  "coherence_source": "none",
  "n_active_storms": 0,
  "top_probability": 0.0,
  "source_artifacts": [
    "/data/live-tornadoes.json",
    "/data/tornado-storms.geojson"
  ],
  "storms": []
}