New York, New York Revisions
MILEPOST 1420
New York's forecast for Wednesday has moved 7°F colder
60°F in the 20261016T00:00Z run, 53°F in the 20261017T18:00Z — the 3rd-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 6°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 21 at 15Z in New York, that trail runs from 59.8°F in the 20261016T00:00Z cycle to 52.6°F in the 20261017T18:00Z — a move of -7.3°F across 8 runs.
The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.
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 Wednesday at 15Z api.weather.city /v1/history (nbm-qmd) |
-7.3 °F | normal 0.0 °F · 3 of 5 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
6.2 °F | normal 7.3 °F current run |
- Milepost
- 1420 · laid 2026-10-18T04:25:17Z
- Model
- nbm-qmd · cycle 20261017T18:00Z
- 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
- 4e2c0a6a062bd0d8d323d6a0cb15ba9c7430fe6fba98d064e274d1d0684a954e
- Machine
- JSON