Nashville, Tennessee Revisions
MILEPOST 1071
Nashville's forecast for Friday has moved 8°F warmer
86°F in the 20260911T00:00Z run, 94°F in the 20260912T18:00Z — the 3rd-largest revision of the 6 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 10°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 18 at 21Z in Nashville, that trail runs from 86.1°F in the 20260911T00:00Z cycle to 94.4°F in the 20260912T18:00Z — a move of +8.3°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 Friday at 21Z api.weather.city /v1/history (nbm-qmd) |
8.3 °F | normal 0.0 °F · 3 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
10 °F | normal 8.3 °F current run |
- Milepost
- 1071 · laid 2026-09-13T04:25:15Z
- Model
- nbm-qmd · cycle 20260912T18:00Z
- 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
- 22d430a4461ef0f5c288d00a828211b296bd4bd4f7cb5835a9d6c1a5cf157e3f
- Machine
- JSON