{
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    "precipitation:2026-02-15": {
      "dedup_key": "precipitation:2026-02-15",
      "alert_type": "precipitation",
      "sent_at": "2026-02-15T04:01:08.196632",
      "forecast_hour": "2026-02-15-06"
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  },
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  "previous_alert_snapshots": {
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      "extreme_value": 79.0,
      "threshold": 60,
      "start_time": "2026-02-15-06",
      "end_time": "2026-02-15-07",
      "hour_count": 2,
      "captured_at": "2026-02-15T04:01:08.196649"
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  "last_ai_summary_sent": null
}