{
  "sent_alerts": {
    "temperature_low:2026-02-22": {
      "dedup_key": "temperature_low:2026-02-22",
      "alert_type": "temperature_low",
      "sent_at": "2026-02-22T08:01:03.833269",
      "forecast_hour": "2026-02-22-10"
    }
  },
  "last_updated": "2026-02-22T08:01:03.833314",
  "previous_alert_snapshots": {
    "temperature_low": {
      "alert_type": "temperature_low",
      "extreme_value": 29.9,
      "threshold": 32,
      "start_time": "2026-02-22-10",
      "end_time": "2026-02-22-12",
      "hour_count": 3,
      "captured_at": "2026-02-22T08:01:03.833295"
    }
  },
  "last_ai_summary_sent": null
}