New York, New York Revisions
MILEPOST 1126
New York's forecast for Thursday has moved 13°F colder
74°F in the 20260916T00:00Z run, 61°F in the 20260917T18:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 14°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, September 24 at 18Z in New York, that trail runs from 73.6°F in the 20260916T00:00Z cycle to 60.6°F in the 20260917T18:00Z — a move of -13.1°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 Thursday at 18Z api.weather.city /v1/history (nbm-qmd) |
-13.1 °F | normal 0.0 °F · 1 of 10 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.5 °F | normal 13.1 °F current run |
- Milepost
- 1126 · laid 2026-09-18T04:25:21Z
- Model
- nbm-qmd · cycle 20260917T18:00Z
- 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
- 9234832cc60f09a4ab71c50958dd0487602fb3eb983a1f0d437a2e56a8c535e5
- Machine
- JSON