Nashville, Tennessee Revisions
MILEPOST 1536
Nashville's forecast for Friday has moved 6°F colder
70°F in the 20261029T12:00Z run, 63°F in the 20261030T00:00Z — the 3rd-largest revision of the 4 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 18°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, November 6 at 21Z in Nashville, that trail runs from 69.6°F in the 20261029T12:00Z cycle to 63.4°F in the 20261030T00:00Z — a move of -6.2°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) |
-6.2 °F | normal 0.0 °F · 3 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
18 °F | normal 6.2 °F current run |
- Milepost
- 1536 · laid 2026-10-30T10:25:24Z
- Model
- nbm-qmd · cycle 20261030T00:00Z
- 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
- fb6e9291cf9ace8e141327e89249b702c7d55d97739bd1e6512e937da249bc5e
- Machine
- JSON