Nashville, Tennessee Revisions
MILEPOST 1198
Nashville's forecast for Thursday has moved 10°F colder
90°F in the 20260922T12:00Z run, 80°F in the 20260924T06:00Z — 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 22°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, October 1 at 18Z in Nashville, that trail runs from 90.0°F in the 20260922T12:00Z cycle to 79.5°F in the 20260924T06:00Z — a move of -10.5°F across 8 runs.
The change sits well inside the run's own spread, which is the guidance converging rather than reversing.
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 Thursday at 18Z api.weather.city /v1/history (nbm-qmd) |
-10.5 °F | normal 0.0 °F · 3 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
22.2 °F | normal 10.5 °F current run |
- Milepost
- 1198 · laid 2026-09-24T17:26:38Z
- Model
- nbm-qmd · cycle 20260924T06:00Z
- 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
- c82a581395282e8e93dffe062a20be118ae3951fb913827417d61e1e5150362d
- Machine
- JSON