Salt Lake City's forecast for Wednesday has moved 11°F colder
42°F in the 20261111T18:00Z run, 31°F in the 20261113T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 15°F.
RevisionsFriday, November 13, 2026Salt Lake City, Utah
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Milepost 1683
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, November 18 at 12Z in Salt Lake City, that trail runs from 41.9°F in the 20261111T18:00Z cycle to 30.9°F in the 20261113T12:00Z — a move of -10.9°F across 8 runs.
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.
Model NBM-QMD, via api.weather.city /v1/history. Percentiles are the same run's own.
The numbers in this piece, with what they are measured against
| forecast revision for Wednesday at 12Z api.weather.city /v1/history (nbm-qmd) |
-10.9 °F | normal 0.0 °F · 1 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.6 °F | normal 10.9 °F current run |
- Milepost
- 1683 · laid 2026-11-13T22:25:32Z
- Model
- nbm-qmd · cycle 20261113T12:00Z
- Desk
- revision v1
- Method
- the same valid time read from successive synoptic cycles; the move is last run minus first run
- Stores
- https://api.weather.city/v1/history
- Tagged
- I-500 Daily Weather · Salt Lake City, Utah (40.761, -111.891) · by rule, at build
- Digest
- 16ca1ce372ecd8014df664a0f96df8a8aa4a9970745e01d69e7527a227545a52