New York, New York Revisions
MILEPOST 1122
New York's forecast for Thursday has moved 11°F colder
73°F in the 20260915T18:00Z run, 61°F in the 20260917T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 13°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 72.9°F in the 20260915T18:00Z cycle to 61.5°F in the 20260917T12:00Z — a move of -11.4°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) |
-11.4 °F | normal 0.0 °F · 1 of 7 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
13.2 °F | normal 11.4 °F current run |
- Milepost
- 1122 · laid 2026-09-17T22:25:17Z
- Model
- nbm-qmd · cycle 20260917T12:00Z
- 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
- 1ad19476496e78e442c61d450065ef5462881082f4d89384dc5692cfb50edce8
- Machine
- JSON