New York, New York Revisions
MILEPOST 1187
New York's forecast for Friday has moved 7°F warmer
63°F in the 20260921T06:00Z run, 71°F in the 20260923T00:00Z — the 2nd-largest revision of the 5 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 17°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 63.1°F in the 20260921T06:00Z cycle to 70.5°F in the 20260923T00:00Z — a move of +7.4°F across 8 runs.
The change sits well inside the run's own spread, which is the guidance converging rather than reversing.
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) |
7.4 °F | normal 0.0 °F · 2 of 5 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16.8 °F | normal 7.4 °F current run |
- Milepost
- 1187 · laid 2026-09-23T10:25:25Z
- Model
- nbm-qmd · cycle 20260923T00:00Z
- 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
- 2c236786515a1c40b3a1e91f9675e95e1d653e9024bbe25ce431e389bd9f809f
- Machine
- JSON