Dallas, Texas Revisions
MILEPOST 1149
Dallas's forecast for Wednesday has moved 7°F colder
77°F in the 20260919T00:00Z run, 70°F in the 20260919T18:00Z — the 3rd-largest revision of the 3 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 18°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, September 30 at 12Z in Dallas, that trail runs from 77.0°F in the 20260919T00:00Z cycle to 70.2°F in the 20260919T18:00Z — a move of -6.8°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 Wednesday at 12Z api.weather.city /v1/history (nbm-qmd) |
-6.8 °F | normal 0.0 °F · 3 of 3 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
18.4 °F | normal 6.8 °F current run |
- Milepost
- 1149 · laid 2026-09-20T04:25:19Z
- Model
- nbm-qmd · cycle 20260919T18:00Z
- 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
- b20def0d8d1168d79c595535f8581a2a5cafacb8ef4c40449a50c6aec217c6b7
- Machine
- JSON