New York, New York Revisions
MILEPOST 1181
New York's forecast for Friday has moved 8°F warmer
61°F in the 20260920T18:00Z run, 70°F in the 20260922T12:00Z — the 3rd-largest revision of the 4 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 16°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 61.4°F in the 20260920T18:00Z cycle to 69.6°F in the 20260922T12:00Z — a move of +8.2°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) |
8.2 °F | normal 0.0 °F · 3 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
15.6 °F | normal 8.2 °F current run |
- Milepost
- 1181 · laid 2026-09-22T22:25:12Z
- Model
- nbm-qmd · cycle 20260922T12:00Z
- 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
- 40d35c1edb10a72612f305d92bccbb1bef445f10f4e6e755364c844710b28f99
- Machine
- JSON