Phoenix, Arizona Revisions
MILEPOST 1103
Phoenix's forecast for Thursday has moved 12°F colder
97°F in the 20260914T00:00Z run, 84°F in the 20260915T18:00Z — the 2nd-largest revision of the 5 cities on the roster that moved at all.
Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, September 17 at 00Z in Phoenix, that trail runs from 96.9°F in the 20260914T00:00Z cycle to 84.4°F in the 20260915T18:00Z — a move of -12.5°F across 8 runs.
This run family does not publish percentiles at this valid time, so the change is reported without a spread to judge it against.
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 00Z api.weather.city /v1/history (nbm-qmd) |
-12.5 °F | normal 0.0 °F · 2 of 5 8 synoptic cycles |
- Milepost
- 1103 · laid 2026-09-16T04:25:13Z
- Model
- nbm-qmd · cycle 20260915T18:00Z
- 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
- 304dda2f0452118ee8d444cf69055e698442d0cb231d7e51ac9e20ba268c5f16
- Machine
- JSON