docsadvancedexceedance

Exceedance

GET/api/v1/accuracy/exceedance

Fraction of forecasts with absolute error above each threshold. Useful for threshold-based evaluation — answers questions like 'what percentage of KLAX forecasts miss by more than 3°F?'

Parameters

Name	Type	Required	Description
`station_id`	string	required	ICAO station identifier
`thresholds`	string	optional	Comma-separated °F thresholds Default: 1,2,3,5
`days`	integer	optional	Rolling window Default: 90
`metric`	string	optional	high (default) or low — daily high vs daily low verification Default: high

Response Fields

Field	Type	Description
`station_id`	string	ICAO station identifier
`thresholds`	array	Array of { threshold_f, exceedance_rate }
`verification_pairs`	integer	Total pairs analyzed
`unique_days`	integer	Unique calendar days

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Exceedance Summary →

cURL

curl -s -H "Authorization: Bearer $API_KEY" "https://api.deltadaemon.com/api/v1/accuracy/exceedance?station_id=KLAX&thresholds=1,2,3,5&days=90"

JSON

{
  "success": true,
  "data": {
    "station_id": "KBOS",
    "thresholds": [
      {"threshold_f": 1, "exceedance_rate": 0.57},
      {"threshold_f": 2, "exceedance_rate": 0.34},
      {"threshold_f": 3, "exceedance_rate": 0.3},
      {"threshold_f": 5, "exceedance_rate": 0.17}
    ],
    "verification_pairs": 47,
    "unique_days": 4
  },
  "metadata": {
    "generated_at": "2026-02-22T07:57:35.524025634Z",
    "local_generated_at": "2026-02-22T02:57:35-05:00",
    "days_analyzed": 30,
    "station_id": "KBOS",
    "station_timezone": "America/New_York"
  }
}

cURL

curl -s -H "Authorization: Bearer $API_KEY" "https://api.deltadaemon.com/api/v1/accuracy/exceedance?station_id=KLAX&thresholds=1,2,3,5&days=90"

JSON

{
  "success": true,
  "data": {
    "station_id": "KBOS",
    "thresholds": [
      {"threshold_f": 1, "exceedance_rate": 0.57},
      {"threshold_f": 2, "exceedance_rate": 0.34},
      {"threshold_f": 3, "exceedance_rate": 0.3},
      {"threshold_f": 5, "exceedance_rate": 0.17}
    ],
    "verification_pairs": 47,
    "unique_days": 4
  },
  "metadata": {
    "generated_at": "2026-02-22T07:57:35.524025634Z",
    "local_generated_at": "2026-02-22T02:57:35-05:00",
    "days_analyzed": 30,
    "station_id": "KBOS",
    "station_timezone": "America/New_York"
  }
}