{
 "number": 1364,
 "headline": "Salt Lake City's forecast for Wednesday has moved 17\u00b0F colder",
 "standfirst": "65\u00b0F in the 20261010T12:00Z run, 47\u00b0F in the 20261012T06:00Z \u2014 the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 26\u00b0F.",
 "desk": "revision",
 "dateline": {
  "place": "Salt Lake City",
  "state": "Utah",
  "lat": 40.761,
  "lon": -111.891,
  "site_key": "utah",
  "site_name": "Forecast Utah",
  "site_url": "https://forecastutah.com",
  "accent": "#d9748a"
 },
 "edition": "2026-10-12",
 "published": "2026-10-12T16:25:15Z",
 "updated": null,
 "access": "free",
 "body_html": "<p>Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 21 at 18Z in Salt Lake City, that trail runs from <span class=\"mono\">64.7\u00b0F</span> in the <span class=\"mono\">20261010T12:00Z</span> cycle to <span class=\"mono\">47.4\u00b0F</span> in the <span class=\"mono\">20261012T06:00Z</span> \u2014 a move of <span class=\"mono\">-17.3\u00b0F</span> across 8 runs.</p><p>The change is about half the run's 10th-to-90th percentile spread, so the earlier forecast is still inside the current range of outcomes.</p><p class=\"note\">Model NBM-QMD, via api.weather.city /v1/history. Percentiles are the same run's own.</p>",
 "body_key": null,
 "teaser_html": "",
 "claims": [
  {
   "text": "forecast revision for Wednesday at 18Z",
   "value": -17.3,
   "unit": "\u00b0F",
   "normal": 0.0,
   "rank": 1,
   "of": 11,
   "period": "8 synoptic cycles",
   "source": "api.weather.city /v1/history (nbm-qmd)"
  },
  {
   "text": "10th-to-90th percentile spread at that hour",
   "value": 26.2,
   "unit": "\u00b0F",
   "normal": 17.3,
   "rank": null,
   "of": null,
   "period": "current run",
   "source": "api.weather.city (nbm-qmd)"
  }
 ],
 "assets": [],
 "provenance": {
  "built_at": "2026-10-12T16:25:15Z",
  "model": "nbm-qmd",
  "cycle": "20261012T06:00Z",
  "stores": [
   "https://api.weather.city/v1/history"
  ],
  "mint_sha256": null,
  "pairing_rule": "the same valid time read from successive synoptic cycles; the move is last run minus first run",
  "detector": "revision",
  "detector_version": "1",
  "inputs": {
   "city": "Salt Lake City",
   "lat": 40.761,
   "lon": -111.891,
   "runs": 8,
   "valid": "2026-10-21T18:00:00",
   "first_run": "20261010T12:00Z",
   "last_run": "20261012T06:00Z"
  }
 },
 "strength": 0.851,
 "tags": [
  "revision",
  "guidance",
  "utah"
 ],
 "supersedes": null,
 "superseded_by": null,
 "source": "wire",
 "canonical": null,
 "slug": "salt-lake-city-s-forecast-for-wednesday-has-moved-17-f-colder",
 "path": "/mp/1364/",
 "url": "https://forecastpost.com/mp/1364/",
 "desk_label": "Revisions",
 "digest": "424e7cb090f701f49f84c93f0f21627f36f8e7852e5f6282a02209c608e4c0bd"
}