Nashville, Tennessee Revisions
MILEPOST 1233
Nashville's forecast for Saturday has moved 9°F warmer
75°F in the 20260926T06:00Z run, 83°F in the 20260928T00:00Z — the largest revision of any city on the roster. 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 Saturday, October 3 at 00Z in Nashville, that trail runs from 74.6°F in the 20260926T06:00Z cycle to 83.3°F in the 20260928T00:00Z — a move of +8.7°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 Saturday at 00Z api.weather.city /v1/history (nbm-qmd) |
8.7 °F | normal 0.0 °F · 1 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.8 °F | normal 8.7 °F current run |
- Milepost
- 1233 · laid 2026-09-28T10:25:13Z
- Model
- nbm-qmd · cycle 20260928T00:00Z
- 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
- 3106d12434ee78c1cfc023d03ffe8d01027d6a43a441a1db0ca044dcb5280cbe
- Machine
- JSON