New York, New York Revisions
MILEPOST 1117
New York's forecast for Tuesday has moved 10°F colder
72°F in the 20260915T06:00Z run, 62°F in the 20260917T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 11°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Tuesday, September 22 at 18Z in New York, that trail runs from 71.9°F in the 20260915T06:00Z cycle to 61.8°F in the 20260917T00:00Z — a move of -10.1°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 Tuesday at 18Z api.weather.city /v1/history (nbm-qmd) |
-10.1 °F | normal 0.0 °F · 1 of 3 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
11.1 °F | normal 10.1 °F current run |
- Milepost
- 1117 · laid 2026-09-17T11:25:16Z
- Model
- nbm-qmd · cycle 20260917T00:00Z
- 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
- c7c4b4f28e5bf0137299c55a8a438b5c22c941748740d4cef13600da11b31573
- Machine
- JSON