Dallas, Texas Revisions
MILEPOST 1227
Dallas's forecast for Saturday has moved 18°F colder
92°F in the 20260925T12:00Z run, 74°F in the 20260927T06:00Z — the largest revision of any city on the roster. 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 Saturday, October 3 at 18Z in Dallas, that trail runs from 91.7°F in the 20260925T12:00Z cycle to 74.2°F in the 20260927T06:00Z — a move of -17.5°F across 8 runs.
The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.
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 Saturday at 18Z api.weather.city /v1/history (nbm-qmd) |
-17.5 °F | normal 0.0 °F · 1 of 11 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.7 °F | normal 17.5 °F current run |
- Milepost
- 1227 · laid 2026-09-27T16:25:11Z
- Model
- nbm-qmd · cycle 20260927T06:00Z
- 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
- 583099241d6626ccddc4e8c11c61b2f09024fa2df49b9b22cd30b1370072ff7b
- Machine
- JSON