Salt Lake City, Utah Revisions
MILEPOST 1064
Salt Lake City's forecast for Friday has moved 9°F colder
67°F in the 20260910T12:00Z run, 57°F in the 20260912T06:00Z — the 3rd-largest revision of the 10 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 12°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 18 at 09Z in Salt Lake City, that trail runs from 66.6°F in the 20260910T12:00Z cycle to 57.3°F in the 20260912T06:00Z — a move of -9.4°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 Friday at 09Z api.weather.city /v1/history (nbm-qmd) |
-9.4 °F | normal 0.0 °F · 3 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
12.2 °F | normal 9.4 °F current run |
- Milepost
- 1064 · laid 2026-09-12T16:25:15Z
- Model
- nbm-qmd · cycle 20260912T06:00Z
- 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
- e5785fd499130a3c6a2dd25ed37222b7c1fda9a7c03f99a8c31539110390069b
- Machine
- JSON