Salt Lake City, Utah Revisions
MILEPOST 1082
Salt Lake City's forecast for Sunday has moved 9°F colder
83°F in the 20260912T00:00Z run, 74°F in the 20260914T00:00Z — the 3rd-largest revision of the 8 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 12°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, September 20 at 00Z in Salt Lake City, that trail runs from 83.1°F in the 20260912T00:00Z cycle to 74.0°F in the 20260914T00:00Z — a move of -9.1°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 Sunday at 00Z api.weather.city /v1/history (nbm-qmd) |
-9.1 °F | normal 0.0 °F · 3 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
11.6 °F | normal 9.1 °F current run |
- Milepost
- 1082 · laid 2026-09-14T10:25:12Z
- Model
- nbm-qmd · cycle 20260914T00:00Z
- 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
- e6617d8256adcc0d89ecbc4662f104f33884665fdc913d1b6d0c6cd3472de49c
- Machine
- JSON