New York, New York Revisions
MILEPOST 1146
New York's forecast for Monday has moved 6°F warmer
59°F in the 20260917T18:00Z run, 65°F in the 20260919T12:00Z — the 3rd-largest revision of the 3 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 9°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, September 28 at 12Z in New York, that trail runs from 59.0°F in the 20260917T18:00Z cycle to 65.2°F in the 20260919T12:00Z — a move of +6.1°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 Monday at 12Z api.weather.city /v1/history (nbm-qmd) |
6.1 °F | normal 0.0 °F · 3 of 3 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
9.2 °F | normal 6.1 °F current run |
- Milepost
- 1146 · laid 2026-09-19T22:25:21Z
- Model
- nbm-qmd · cycle 20260919T12:00Z
- 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
- 68b23e85695a861b101ac1da5b308ee2d3a1acfa2b7c2bae6bd7084793c1dd28
- Machine
- JSON