New York, New York Revisions
MILEPOST 1133
New York's forecast for Friday has moved 10°F colder
72°F in the 20260916T18:00Z run, 63°F in the 20260918T12:00Z — the 2nd-largest revision of the 6 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 15°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 25 at 18Z in New York, that trail runs from 72.3°F in the 20260916T18:00Z cycle to 62.8°F in the 20260918T12:00Z — a move of -9.5°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 Friday at 18Z api.weather.city /v1/history (nbm-qmd) |
-9.5 °F | normal 0.0 °F · 2 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
14.9 °F | normal 9.5 °F current run |
- Milepost
- 1133 · laid 2026-09-18T22:25:15Z
- Model
- nbm-qmd · cycle 20260918T12:00Z
- 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
- 0a12670fc7cb0ec658a213ca07d12a227ffdf03cd5cebdc8dac9426d1664be9d
- Machine
- JSON