Dallas's forecast for Monday has moved 16°F colder
91°F in the 20260924T06:00Z run, 75°F in the 20260925T06:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 26°F.
RevisionsFriday, September 25, 2026Dallas, Texas
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Milepost 1209
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 74.9°F in the 20260925T06:00Z — a move of -16.3°F across 8 runs.
The change is about half the run's 10th-to-90th percentile spread, so the earlier forecast is still inside the current range of outcomes.
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) |
-16.3 °F | normal 0.0 °F · 1 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
26.4 °F | normal 16.3 °F current run |
- Milepost
- 1209 · laid 2026-09-25T16:25:16Z
- Model
- nbm-qmd · cycle 20260925T06:00Z
- 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
- 5f8a94db7acea7fb5d4be9323e923fce039e2b77634a12d0212fdfa9ba48ea11