Phoenix, Arizona Revisions
MILEPOST 1539
Phoenix's forecast for Monday has moved 7°F warmer
64°F in the 20261028T12:00Z run, 71°F in the 20261030T06:00Z — the 3rd-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 15°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, November 2 at 06Z in Phoenix, that trail runs from 64.0°F in the 20261028T12:00Z cycle to 70.7°F in the 20261030T06:00Z — a move of +6.7°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 06Z api.weather.city /v1/history (nbm-qmd) |
6.7 °F | normal 0.0 °F · 3 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
15.2 °F | normal 6.7 °F current run |
- Milepost
- 1539 · laid 2026-10-30T16:25:25Z
- Model
- nbm-qmd · cycle 20261030T06:00Z
- 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
- 1f0633097cff769a8d466992ade8171fcdd56720fe1504c083308c494cc76a98
- Machine
- JSON