Salt Lake City, Utah Revisions
MILEPOST 1389
Salt Lake City's forecast for Wednesday has moved 15°F warmer
48°F in the 20261013T06:00Z run, 63°F in the 20261015T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 19°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 47.8°F in the 20261013T06:00Z cycle to 63.3°F in the 20261015T00:00Z — a move of +15.5°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 18Z api.weather.city /v1/history (nbm-qmd) |
15.5 °F | normal 0.0 °F · 1 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
18.8 °F | normal 15.5 °F current run |
- Milepost
- 1389 · laid 2026-10-15T10:25:17Z
- Model
- nbm-qmd · cycle 20261015T00:00Z
- 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
- c131184d51d0af53ba675ed63e4a441a62e03e82882935f56c7177c5f803fe5d
- Machine
- JSON