Nashville, Tennessee Revisions
MILEPOST 1318
Nashville's forecast for Saturday has moved 13°F colder
83°F in the 20261005T18:00Z run, 70°F in the 20261007T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 19°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Saturday, October 10 at 21Z in Nashville, that trail runs from 83.5°F in the 20261005T18:00Z cycle to 70.3°F in the 20261007T12:00Z — a move of -13.2°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 21Z api.weather.city /v1/history (nbm-qmd) |
-13.2 °F | normal 0.0 °F · 1 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
19.4 °F | normal 13.2 °F current run |
- Milepost
- 1318 · laid 2026-10-07T22:25:15Z
- Model
- nbm-qmd · cycle 20261007T12:00Z
- 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
- b2d859c61b4be28969f22ab5a8906082bf94733a6f3073f981d0138ecd6cc589
- Machine
- JSON