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Milepost
1465

TheForecast Post

A chronicle of American weather and climate  ·  Thursday, 22 October 2026

New York, New York Revisions MILEPOST 1464

New York's forecast for Thursday has moved 7°F warmer

48°F in the 20261020T06:00Z run, 55°F in the 20261022T00:00Z — the 2nd-largest revision of the 4 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 11°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, October 29 at 12Z in New York, that trail runs from 47.9°F in the 20261020T06:00Z cycle to 55.3°F in the 20261022T00:00Z — a move of +7.4°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 Thursday at 12Z
api.weather.city /v1/history (nbm-qmd)
7.4 °F normal 0.0 °F · 2 of 4
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
10.8 °F normal 7.4 °F
current run
Milepost
1464 · laid 2026-10-22T10:25:19Z
Model
nbm-qmd · cycle 20261022T00:00Z
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
3535f6b2f12006eced39dccfd393c055d99036e71be3c4dd6510a7235be95f1f
Machine
JSON