Denver's forecast for Monday has moved 11°F colder
73°F in the 20260923T18:00Z run, 61°F in the 20260925T12:00Z — the 2nd-largest revision of the 4 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 32°F.
RevisionsFriday, September 25, 2026Denver, Colorado
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Milepost 1212
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, October 5 at 00Z in Denver, that trail runs from 72.5°F in the 20260923T18:00Z cycle to 61.2°F in the 20260925T12:00Z — a move of -11.3°F across 8 runs.
The change sits well inside the run's own spread, which is the guidance converging rather than reversing.
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 Monday at 00Z api.weather.city /v1/history (nbm-qmd) |
-11.3 °F | normal 0.0 °F · 2 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
32.4 °F | normal 11.3 °F current run |
- Milepost
- 1212 · laid 2026-09-25T22:25:14Z
- Model
- nbm-qmd · cycle 20260925T12:00Z
- Desk
- revision v1
- Method
- the same valid time read from successive synoptic cycles; the move is last run minus first run
- Stores
- https://api.weather.city/v1/history
- Tagged
- I-500 Daily Weather · Denver, Colorado (39.739, -104.99) · by rule, at build
- Digest
- 60c45f5eeac32afb47ca0257663a2a3fea9d64cc407bb6d755059af2cdb355c0