New York, New York Revisions
MILEPOST 1204
New York's forecast for Saturday has moved 10°F colder
68°F in the 20260923T00:00Z run, 58°F in the 20260924T18:00Z — the 2nd-largest revision of the 8 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 Saturday, September 26 at 18Z in New York, that trail runs from 67.9°F in the 20260923T00:00Z cycle to 57.6°F in the 20260924T18:00Z — a move of -10.2°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 Saturday at 18Z api.weather.city /v1/history (nbm-qmd) |
-10.2 °F | normal 0.0 °F · 2 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16.5 °F | normal 10.2 °F current run |
- Milepost
- 1204 · laid 2026-09-25T04:25:13Z
- Model
- nbm-qmd · cycle 20260924T18:00Z
- 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
- 78778ffc6d116823b964e885b5c93e7bfed3a47515c98700b97eaaf1ddf0583a
- Machine
- JSON