Nashville, Tennessee Revisions
MILEPOST 1078
Nashville's forecast for Sunday has moved 9°F warmer
84°F in the 20260911T18:00Z run, 94°F in the 20260913T18:00Z — the 2nd-largest revision of the 8 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 14°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, September 20 at 18Z in Nashville, that trail runs from 84.4°F in the 20260911T18:00Z cycle to 93.7°F in the 20260913T18:00Z — a move of +9.3°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 Sunday at 18Z api.weather.city /v1/history (nbm-qmd) |
9.3 °F | normal 0.0 °F · 2 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.1 °F | normal 9.3 °F current run |
- Milepost
- 1078 · laid 2026-09-14T04:25:13Z
- Model
- nbm-qmd · cycle 20260913T18:00Z
- 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
- 0f51b81f80c9b29cd9b19478a2930ed82f9446c2adaee06a8bece10819c64f7b
- Machine
- JSON