{
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      "alert_type": "severe_weather",
      "sent_at": "2026-01-27T04:01:04.060959",
      "forecast_hour": "urn:oid:2.49.0.1.840.0.a033d1bb10e6ac1b241933480d60aaaaba70e05d.001.1"
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    "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": "2026-01-28T00:01:04.153957",
  "previous_alert_snapshots": {
    "temperature_low": {
      "alert_type": "temperature_low",
      "extreme_value": 26.0,
      "threshold": 32,
      "start_time": "2026-01-28-01",
      "end_time": "2026-01-28-04",
      "hour_count": 4,
      "captured_at": "2026-01-28T00:01:04.153944"
    }
  },
  "last_ai_summary_sent": null
}