{
  "prepared": "2026-09-05",
  "purpose": "Document temperature context for synthetic historical source screening",
  "normalPeriod": {
    "years": "1991\u20132020",
    "monthlyExtremeMaximaC": [
      13.5,
      20.0,
      25.9,
      31.5,
      35.9,
      36.0,
      37.6,
      36.9,
      38.2,
      27.7,
      16.2,
      15.2
    ],
    "monthlyExtremeMinimaC": [
      -13.8,
      -11.2,
      -9.1,
      -4.1,
      -1.0,
      3.3,
      5.1,
      5.6,
      0.8,
      -4.7,
      -11.2,
      -13.4
    ]
  },
  "longTermExtremesOnNormalsPage": {
    "years": "1982\u20132020 for this station series",
    "monthlyExtremeMaximaC": [
      13.5,
      20.0,
      25.9,
      31.5,
      37.4,
      36.0,
      37.6,
      36.9,
      38.2,
      28.2,
      16.2,
      15.2
    ],
    "monthlyExtremeMinimaC": [
      -13.8,
      -16.2,
      -9.1,
      -4.1,
      -1.0,
      3.3,
      4.8,
      5.2,
      0.8,
      -6.7,
      -15.8,
      -17.6
    ],
    "minimumC": -17.6,
    "maximumC": 38.2,
    "minimumDate": "1990-12-21",
    "maximumDate": "2017-09-04",
    "sourceUrl": "https://climate.weather.gc.ca/climate_normals/results_1991_2020_e.html?climate_id=10476F0&dispBack=0&wbdisable=true"
  },
  "june2021": {
    "retrievedDays": 30,
    "validDailyMaxima": 30,
    "peakDailyMaximumC": 43,
    "peakDate": "2021-06-28",
    "peakFlag": null,
    "peakDailyMaximumK": 316.15,
    "sourceUrl": "https://api.weather.gc.ca/collections/climate-daily/items?f=json&limit=100&CLIMATE_IDENTIFIER=10476F0&LOCAL_YEAR=2021&LOCAL_MONTH=6"
  },
  "observed2025HourlyContext": [
    {
      "station": "Squamish Airport",
      "eligibleRows": 8741,
      "minimumC": -11,
      "minimumLocalPst": "2025-02-11 07:00:00",
      "maximumC": 33.7,
      "maximumLocalPst": "2025-08-11 11:00:00",
      "sourcePath": "work/hourly_2025_raw.json",
      "sourceSha256": "7dce82761cef7f9584ecb329fb8f19fa971fc591214bc5d3844dedd8bf57fcb2"
    },
    {
      "station": "Pam Rocks",
      "eligibleRows": 8748,
      "minimumC": -4.2,
      "minimumLocalPst": "2025-02-03 15:00:00",
      "maximumC": 28.5,
      "maximumLocalPst": "2025-08-23 16:00:00",
      "sourcePath": "work/annual-winds/pam-rocks-2025-original.json",
      "sourceSha256": "e5b546620e6bb66d68f0bcf7a3f596bfabefdea01a2b8837c9f304f4df4e3874"
    }
  ],
  "proposedScreeningTemperatures": {
    "minimumK": 250,
    "maximumK": 320,
    "minimumC": -23.15,
    "maximumC": 46.85,
    "status": "Explicit synthetic sensitivity setting, not observed bounds at the flare",
    "rationale": "Retain EPA default lower temperature, below the inspected station-series minimum; raise upper temperature from310K to the next outward5K increment above316.15K.",
    "notEstablished": [
      "All regional or future extremes enclosed",
      "Temperature at flare height",
      "Inversion profile",
      "Continuous search of every temperature in the range"
    ],
    "discreteSamplingCaveat": "MAKEMET samples selected temperatures; changing endpoints also changes the midpoint. A wider interval does not necessarily contain the old meteorological matrix."
  },
  "quality": "Native daily flags retained; null flags alone do not establish a final validation level. Normals values may undergo provider quality updates.",
  "sourceFiles": [
    {
      "path": "work/screening-temperature/squamish-normals-1991-2020.html",
      "bytes": 153211,
      "sha256": "d9f51e1baa89a335b0487b23cb759c287d406af6bf4bb66931dfc8f3a1ae82cf"
    },
    {
      "path": "work/screening-temperature/squamish-june2021-daily.json",
      "bytes": 29751,
      "sha256": "81caf80325e3a0e0cafd395a0d436e2840a7e62ecd854356223f88e92c019d29"
    }
  ],
  "licence": "https://eccc-msc.github.io/open-data/licence/readme_en/"
}