Phoenix, Arizona Revisions
MILEPOST 1546
Phoenix's forecast for Monday has moved 8°F warmer
63°F in the 20261029T06:00Z run, 70°F in the 20261031T00:00Z — the 3rd-largest revision of the 5 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 17°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, November 2 at 09Z in Phoenix, that trail runs from 62.6°F in the 20261029T06:00Z cycle to 70.4°F in the 20261031T00:00Z — a move of +7.8°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 09Z api.weather.city /v1/history (nbm-qmd) |
7.8 °F | normal 0.0 °F · 3 of 5 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
17 °F | normal 7.8 °F current run |
- Milepost
- 1546 · laid 2026-10-31T10:25:22Z
- Model
- nbm-qmd · cycle 20261031T00:00Z
- 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
- 0cc1e65e2232919556d5de3e42a88f3d3ac7ad7fc6b93eb8d1a19c1bcf5fc835
- Machine
- JSON