Nashville, Tennessee Revisions
MILEPOST 1340
Nashville's forecast for Wednesday has moved 13°F warmer
74°F in the 20261007T18:00Z run, 86°F in the 20261009T12:00Z — the 2nd-largest revision of the 10 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 16°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 14 at 18Z in Nashville, that trail runs from 73.7°F in the 20261007T18:00Z cycle to 86.3°F in the 20261009T12:00Z — a move of +12.7°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 Wednesday at 18Z api.weather.city /v1/history (nbm-qmd) |
12.7 °F | normal 0.0 °F · 2 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
15.8 °F | normal 12.7 °F current run |
- Milepost
- 1340 · laid 2026-10-09T22:25:15Z
- Model
- nbm-qmd · cycle 20261009T12:00Z
- 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
- 917e7065c3392712c8f2a8f1b8121f3fddce545f6a098fbaee5bfa11807b3699
- Machine
- JSON