New York, New York Revisions
MILEPOST 1113
New York's forecast for Sunday has moved 8°F colder
75°F in the 20260915T00:00Z run, 67°F in the 20260916T18:00Z — the 3rd-largest revision of the 6 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 14°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, September 20 at 18Z in New York, that trail runs from 75.1°F in the 20260915T00:00Z cycle to 66.8°F in the 20260916T18:00Z — a move of -8.3°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 Sunday at 18Z api.weather.city /v1/history (nbm-qmd) |
-8.3 °F | normal 0.0 °F · 3 of 6 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
13.6 °F | normal 8.3 °F current run |
- Milepost
- 1113 · laid 2026-09-17T04:25:20Z
- Model
- nbm-qmd · cycle 20260916T18:00Z
- 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
- 12e320a4138d76c1e5e94c7894197f660e3205b0d24ea91aacc81b8faabab40a
- Machine
- JSON