Dallas, Texas Revisions
MILEPOST 1151
Dallas's forecast for Wednesday has moved 9°F colder
92°F in the 20260919T06:00Z run, 83°F in the 20260920T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 22°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, September 30 at 18Z in Dallas, that trail runs from 92.4°F in the 20260919T06:00Z cycle to 82.9°F in the 20260920T00:00Z — a move of -9.4°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 Wednesday at 18Z api.weather.city /v1/history (nbm-qmd) |
-9.4 °F | normal 0.0 °F · 1 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
21.9 °F | normal 9.4 °F current run |
- Milepost
- 1151 · laid 2026-09-20T10:25:16Z
- Model
- nbm-qmd · cycle 20260920T00:00Z
- 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
- 1cf251599e4dbeaa150e99607f1899578dbcf9814d35bfbdfd4b5dd7116b3045
- Machine
- JSON