Atlanta, Georgia Revisions
MILEPOST 1248
Atlanta's forecast for Wednesday has moved 12°F colder
65°F in the 20260928T00:00Z run, 53°F in the 20260929T18:00Z — the 2nd-largest revision of the 8 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 9°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 7 at 12Z in Atlanta, that trail runs from 65.0°F in the 20260928T00:00Z cycle to 53.0°F in the 20260929T18:00Z — a move of -12.1°F across 8 runs.
The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.
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 12Z api.weather.city /v1/history (nbm-qmd) |
-12.1 °F | normal 0.0 °F · 2 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
9.2 °F | normal 12.1 °F current run |
- Milepost
- 1248 · laid 2026-09-30T04:25:12Z
- Model
- nbm-qmd · cycle 20260929T18:00Z
- 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
- d464b670b4ee56ec678927ece7b76bfc5a9ab023e5ed0eb9f6be97a41d13ec92
- Machine
- JSON