{
  "sent_alerts": {
    "temperature_low:2026-01-28": {
      "dedup_key": "temperature_low:2026-01-28",
      "alert_type": "temperature_low",
      "sent_at": "2026-01-27T20:01:04.140689",
      "forecast_hour": "2026-01-28-00"
    }
  },
  "last_updated": "2026-01-28T12:01:04.631094",
  "previous_alert_snapshots": {
    "temperature_low": {
      "alert_type": "temperature_low",
      "extreme_value": 20.0,
      "threshold": 32,
      "start_time": "2026-01-28-13",
      "end_time": "2026-01-28-16",
      "hour_count": 4,
      "captured_at": "2026-01-28T12:01:04.631091"
    }
  },
  "last_ai_summary_sent": null
}