Nashville, Tennessee Revisions
MILEPOST 1076
Nashville's forecast for Monday has moved 12°F warmer
61°F in the 20260911T12:00Z run, 72°F in the 20260913T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 12°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, September 21 at 12Z in Nashville, that trail runs from 60.8°F in the 20260911T12:00Z cycle to 72.4°F in the 20260913T12:00Z — a move of +11.6°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 12Z api.weather.city /v1/history (nbm-qmd) |
11.6 °F | normal 0.0 °F · 1 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
12.1 °F | normal 11.6 °F current run |
- Milepost
- 1076 · laid 2026-09-13T22:25:16Z
- Model
- nbm-qmd · cycle 20260913T12:00Z
- 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
- 65c572369c5aaf09f262c20057e9f0839ca63d99d75e66a5b927e687517fa7d0
- Machine
- JSON