Nashville, Tennessee Revisions
MILEPOST 1250
Nashville's forecast for Friday has moved 8°F colder
90°F in the 20260928T06:00Z run, 82°F in the 20260930T00:00Z — 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 17°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, October 2 at 21Z in Nashville, that trail runs from 89.8°F in the 20260928T06:00Z cycle to 81.8°F in the 20260930T00:00Z — a move of -8.0°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 Friday at 21Z api.weather.city /v1/history (nbm-qmd) |
-8 °F | normal 0.0 °F · 3 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16.9 °F | normal 8.0 °F current run |
- Milepost
- 1250 · laid 2026-09-30T10:25:14Z
- Model
- nbm-qmd · cycle 20260930T00:00Z
- 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
- 411bf2a2abd71083accbe90b083ae7522ae2eb1e83b8f5e2b2d9bfc3ff1e9f0a
- Machine
- JSON