Denver's forecast for Sunday has moved 10°F warmer
69°F in the 20260928T12:00Z run, 79°F in the 20260930T06:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 7°F.
RevisionsWednesday, September 30, 2026Denver, Colorado
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Milepost 1251
Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, October 4 at 00Z in Denver, that trail runs from 68.9°F in the 20260928T12:00Z cycle to 78.8°F in the 20260930T06:00Z — a move of +10.0°F across 8 runs.
The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.
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 Sunday at 00Z api.weather.city /v1/history (nbm-qmd) |
10 °F | normal 0.0 °F · 1 of 5 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
7.4 °F | normal 10.0 °F current run |
- Milepost
- 1251 · laid 2026-09-30T16:25:15Z
- Model
- nbm-qmd · cycle 20260930T06:00Z
- 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
- 11fc64f30fbcefc5142e96f8b50cce8547b913d45157ccc9aed0dd33cc731c09