Dallas's forecast for Monday has moved 12°F colder
91°F in the 20260924T06:00Z run, 79°F in the 20260924T18:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 25°F.
RevisionsFriday, September 25, 2026Dallas, Texas
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Milepost 1203
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, October 5 at 18Z in Dallas, that trail runs from 91.1°F in the 20260924T06:00Z cycle to 78.9°F in the 20260924T18:00Z — a move of -12.2°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 Monday at 18Z api.weather.city /v1/history (nbm-qmd) |
-12.2 °F | normal 0.0 °F · 1 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
25.4 °F | normal 12.2 °F current run |
- Milepost
- 1203 · laid 2026-09-25T04:25:13Z
- Model
- nbm-qmd · cycle 20260924T18:00Z
- Desk
- revision v1
- Method
- the same valid time read from successive synoptic cycles; the move is last run minus first run
- Stores
- https://api.weather.city/v1/history
- Tagged
- I-500 Daily Weather · Dallas, Texas (32.777, -96.797) · by rule, at build
- Digest
- b9be50fd56f74660a04ea0b535ec0e756c5cc9044c299271f282708f41d4bf62