Nashville, Tennessee Revisions
MILEPOST 1165
Nashville's forecast for Monday has moved 7°F colder
66°F in the 20260919T00:00Z run, 59°F in the 20260920T18:00Z — the 3rd-largest revision of the 4 cities on the roster that moved at all. 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 Monday, September 28 at 12Z in Nashville, that trail runs from 66.3°F in the 20260919T00:00Z cycle to 59.1°F in the 20260920T18:00Z — a move of -7.2°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 12Z api.weather.city /v1/history (nbm-qmd) |
-7.2 °F | normal 0.0 °F · 3 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.8 °F | normal 7.2 °F current run |
- Milepost
- 1165 · laid 2026-09-21T06:28:50Z
- Model
- nbm-qmd · cycle 20260920T18:00Z
- 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
- 3066361ecbe98c7a0a94ccc58d9bcd0be78789361f733b7be06fe937614e31fc
- Machine
- JSON