Salt Lake City, Utah Revisions
MILEPOST 1079
Salt Lake City's forecast for Saturday has moved 8°F colder
84°F in the 20260911T18:00Z run, 75°F in the 20260913T18:00Z — 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 10°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Saturday, September 19 at 00Z in Salt Lake City, that trail runs from 83.9°F in the 20260911T18:00Z cycle to 75.5°F in the 20260913T18:00Z — a move of -8.5°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 Saturday at 00Z api.weather.city /v1/history (nbm-qmd) |
-8.5 °F | normal 0.0 °F · 3 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
10.1 °F | normal 8.5 °F current run |
- Milepost
- 1079 · laid 2026-09-14T04:25:13Z
- Model
- nbm-qmd · cycle 20260913T18:00Z
- 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
- 9fbd8cf54f2f4fe259e235a0d8aa823559eee1c98299d40ac8628f4c9e6550be
- Machine
- JSON