Salt Lake City, Utah Revisions
MILEPOST 1110
Salt Lake City's forecast for Saturday has moved 11°F colder
79°F in the 20260914T18:00Z run, 68°F in the 20260916T12:00Z — the 3rd-largest revision of the 7 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 6°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Saturday, September 19 at 21Z in Salt Lake City, that trail runs from 79.2°F in the 20260914T18:00Z cycle to 68.4°F in the 20260916T12:00Z — a move of -10.8°F across 8 runs.
The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.
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 Saturday at 21Z api.weather.city /v1/history (nbm-qmd) |
-10.8 °F | normal 0.0 °F · 3 of 7 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
5.9 °F | normal 10.8 °F current run |
- Milepost
- 1110 · laid 2026-09-16T22:25:14Z
- Model
- nbm-qmd · cycle 20260916T12:00Z
- Desk
- revision v1
- Method
- the same valid time read from successive synoptic cycles; the move is last run minus first run
- Source
- https://api.weather.city/v1/history
- Digest
- 5e13cc801bbc790bdb3874b6b2ad7d1bac426e5e01846e78db32558c0e8136b5
- Machine
- JSON