{
  "sent_alerts": {
    "precipitation:2026-02-21": {
      "dedup_key": "precipitation:2026-02-21",
      "alert_type": "precipitation",
      "sent_at": "2026-02-21T04:01:04.147327",
      "forecast_hour": "2026-02-21-08"
    }
  },
  "last_updated": "2026-02-21T16:01:04.625664",
  "previous_alert_snapshots": {},
  "last_ai_summary_sent": null
}