{
 "number": 1408,
 "headline": "The month's worst miss: NDFD was 51.0\u00b0F too cool at BIH",
 "standfirst": "A day-2 forecast of 13.0\u00b0F for September 18 at 06Z; the station reported 64.0\u00b0F. It is the largest temperature residual in the ledger over the last 30 days.",
 "desk": "ledger",
 "dateline": {
  "place": "BIH",
  "state": null,
  "lat": null,
  "lon": null,
  "site_key": null,
  "site_name": null,
  "site_url": null,
  "accent": null
 },
 "edition": "2026-10-17",
 "published": "2026-10-17T09:25:18Z",
 "updated": null,
 "access": "free",
 "body_html": "<p>The forecast was issued in the <span class=\"mono\">20260916T18:00Z</span> cycle, 36 hours before valid time, and called for <span class=\"mono\">13.0\u00b0F</span>. The observation was <span class=\"mono\">64.0\u00b0F</span> \u2014 a residual of <span class=\"mono\">-51.0\u00b0F</span>.</p><p>255 of the 9,937 residuals above 12\u00b0F in this window are at the same station, which is a pattern worth reading as one.</p><p class=\"note\">ASOS reports at :53 and the forecast is stamped on the hour, so a forecast is paired with the nearest observation within 30 minutes and otherwise left unscored. 3 rows in this window were excluded as a data defect rather than a forecast error.</p>",
 "body_key": null,
 "teaser_html": "",
 "claims": [
  {
   "text": "forecast, day 2",
   "value": 13.0,
   "unit": "\u00b0F",
   "normal": 64.0,
   "rank": null,
   "of": null,
   "period": "September 17\u2013October 17, 2026",
   "source": "Forecast Network verification ledger"
  },
  {
   "text": "residual",
   "value": -51.0,
   "unit": "\u00b0F",
   "normal": 0.0,
   "rank": 1,
   "of": 9937,
   "period": "September 17\u2013October 17, 2026",
   "source": "Forecast Network verification ledger"
  }
 ],
 "assets": [],
 "provenance": {
  "built_at": "2026-10-17T09:25:14Z",
  "model": "ndfd",
  "cycle": "20260916T18:00Z",
  "stores": [
   "/home/maue/forecastpoints/data/verify/2026-09.ndjson",
   "/home/maue/forecastpoints/data/verify/2026-10.ndjson"
  ],
  "mint_sha256": null,
  "pairing_rule": "ASOS reports at :53 and the forecast is stamped on the hour, so a forecast is paired with the nearest observation within 30 minutes and otherwise left unscored.",
  "detector": "ledger",
  "detector_version": "1",
  "inputs": {
   "station": "BIH",
   "seed": "USW00023157",
   "valid": "2026-09-18T06:00:00Z",
   "lead_h": 36,
   "bust_threshold_f": 12.0,
   "defects_excluded": 3
  }
 },
 "strength": 0.88,
 "tags": [
  "ledger",
  "bust",
  "bih"
 ],
 "supersedes": null,
 "superseded_by": null,
 "source": "wire",
 "canonical": null,
 "slug": "the-month-s-worst-miss-ndfd-was-51-0-f-too-cool-at-bih",
 "path": "/mp/1408/",
 "url": "https://forecastpost.com/mp/1408/",
 "desk_label": "The Ledger",
 "digest": "ac51ce54a4382dc8573d40be281d7587335fb77f9d02bad4f83f8de1e5828e3c"
}