Salt Lake City, Utah Revisions
MILEPOST 1044
Salt Lake City's forecast for Sunday has moved 15°F warmer
63°F in the 20260908T18:00Z run, 78°F in the 20260910T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 22°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, September 13 at 18Z in Salt Lake City, that trail runs from 62.6°F in the 20260908T18:00Z cycle to 77.8°F in the 20260910T12:00Z — a move of +15.2°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 18Z api.weather.city /v1/history (nbm-qmd) |
15.2 °F | normal 0.0 °F · 1 of 9 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
21.6 °F | normal 15.2 °F current run |
- Milepost
- 1044 · laid 2026-09-10T22:25:17Z
- Model
- nbm-qmd · cycle 20260910T12:00Z
- 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
- c42e078ec4a881be7d9abaf0e5c0d836efeda333d03b80c95de55ac9177e3972
- Machine
- JSON