Salt Lake City, Utah Revisions
MILEPOST 1364
Salt Lake City's forecast for Wednesday has moved 17°F colder
65°F in the 20261010T12:00Z run, 47°F in the 20261012T06:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 26°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 21 at 18Z in Salt Lake City, that trail runs from 64.7°F in the 20261010T12:00Z cycle to 47.4°F in the 20261012T06:00Z — a move of -17.3°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 18Z api.weather.city /v1/history (nbm-qmd) |
-17.3 °F | normal 0.0 °F · 1 of 11 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
26.2 °F | normal 17.3 °F current run |
- Milepost
- 1364 · laid 2026-10-12T16:25:15Z
- Model
- nbm-qmd · cycle 20261012T06:00Z
- 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
- 424e7cb090f701f49f84c93f0f21627f36f8e7852e5f6282a02209c608e4c0bd
- Machine
- JSON