Phoenix, Arizona Revisions
MILEPOST 1323
Phoenix's forecast for Sunday has moved 9°F colder
93°F in the 20261006T00:00Z run, 84°F in the 20261007T18:00Z — the 3rd-largest revision of the 10 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 Sunday, October 11 at 00Z in Phoenix, that trail runs from 92.8°F in the 20261006T00:00Z cycle to 83.9°F in the 20261007T18:00Z — 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 Sunday at 00Z api.weather.city /v1/history (nbm-qmd) |
-8.9 °F | normal 0.0 °F · 3 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16 °F | normal 8.9 °F current run |
- Milepost
- 1323 · laid 2026-10-08T04:25:12Z
- Model
- nbm-qmd · cycle 20261007T18:00Z
- 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
- fb27195d2a88a7adf0f131be41e2d1c23effc2eabe461fa10b3f53a4b03e8488
- Machine
- JSON