{
 "tool": "atlas14-idf",
 "toolVersion": "1.0.0",
 "methods": [
  "atlas14 1.1.0"
 ],
 "commit": "ab22876",
 "date": "2026-11-04",
 "summary": "13 of 13 cases (1428 values) within tolerance against NOAA Atlas 14 PFDS, Hand calculation of the published equation.",
 "note": "Generated by _workspace/tools/hh_verification.mjs from the fixtures; commit = code verified.",
 "cases": [
  {
   "id": "PFDS-AMS-Amarillo",
   "what": "Amarillo (35.222, -101.8313): annual maximum series, 15 durations × 9 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 135,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-AMS-Beaumont",
   "what": "Beaumont (30.0802, -94.1266): annual maximum series, 15 durations × 9 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 135,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-AMS-ElPaso",
   "what": "El Paso (31.7619, -106.485): annual maximum series, 15 durations × 9 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 135,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-AMS-Houston",
   "what": "Houston (29.7604, -95.3698): annual maximum series, 15 durations × 9 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 135,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-AMS-SanAntonio",
   "what": "San Antonio (29.4241, -98.4936): annual maximum series, 15 durations × 9 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 135,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-Amarillo",
   "what": "Amarillo (35.222, -101.8313): partial-duration series, 15 durations × 10 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 150,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-Beaumont",
   "what": "Beaumont (30.0802, -94.1266): partial-duration series, 15 durations × 10 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 150,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-ElPaso",
   "what": "El Paso (31.7619, -106.485): partial-duration series, 15 durations × 10 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 150,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-Houston",
   "what": "Houston (29.7604, -95.3698): partial-duration series, 15 durations × 10 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 150,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "PFDS-SanAntonio",
   "what": "San Antonio (29.4241, -98.4936): partial-duration series, 15 durations × 10 recurrence intervals",
   "reference": "NOAA Atlas 14 PFDS (retrieved 2026-11-02)",
   "compared": 150,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "ARITH-LOGLOG",
   "what": "Depth between two durations: 1 in at 10 min, 2 in at 40 min, read at 20 min",
   "reference": "Hand calculation of the published equation (published example)",
   "compared": 1,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "ARITH-INTENSITY",
   "what": "Average intensity of 2.5 in in 30 minutes",
   "reference": "Hand calculation of the published equation (published example)",
   "compared": 1,
   "maxDiff": "0.00 %",
   "pass": true
  },
  {
   "id": "ARITH-LOGLOG-RANGE",
   "what": "A duration shorter than the 5-minute grid (refused)",
   "reference": "Hand calculation of the published equation (published example)",
   "compared": 1,
   "maxDiff": "both refuse",
   "pass": true
  }
 ]
}