Salt Lake City, Utah Revisions
MILEPOST 1286
Salt Lake City's forecast for Wednesday has moved 14°F colder
72°F in the 20261002T12:00Z run, 57°F in the 20261004T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 23°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 14 at 00Z in Salt Lake City, that trail runs from 71.6°F in the 20261002T12:00Z cycle to 57.1°F in the 20261004T00:00Z — a move of -14.5°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 00Z api.weather.city /v1/history (nbm-qmd) |
-14.5 °F | normal 0.0 °F · 1 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
22.6 °F | normal 14.5 °F current run |
- Milepost
- 1286 · laid 2026-10-04T10:25:12Z
- Model
- nbm-qmd · cycle 20261004T00:00Z
- 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
- c1dede6a54e7e1cce49c94282d83c9eb5226681714d552ee4d45f70c41be22ed
- Machine
- JSON