Denver, Colorado Revisions
MILEPOST 1176
Denver's forecast for Thursday has moved 9°F colder
80°F in the 20260920T06:00Z run, 71°F in the 20260922T00:00Z — 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 16°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, September 24 at 21Z in Denver, that trail runs from 79.6°F in the 20260920T06:00Z cycle to 70.7°F in the 20260922T00:00Z — a move of -8.9°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 Thursday at 21Z api.weather.city /v1/history (nbm-qmd) |
-8.9 °F | normal 0.0 °F · 2 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16.5 °F | normal 8.9 °F current run |
- Milepost
- 1176 · laid 2026-09-22T10:25:12Z
- Model
- nbm-qmd · cycle 20260922T00:00Z
- 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
- a09e354d4c287ba6e56fd4ffab5d6e5d83b147a6c2da95d01d15582257e3322a
- Machine
- JSON