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Forecast Post
New York's forecast for Tuesday has moved 8°F warmer Subscribe

New York's forecast for Tuesday has moved 8°F warmer

49°F in the 20261111T06:00Z run, 57°F in the 20261113T00:00Z — the 2nd-largest revision of the 7 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 3°F.

JSON Milepost 1681

Successive cycles do not merely refresh a forecast; they leave a trail. For Tuesday, November 17 at 21Z in New York, that trail runs from 48.6°F in the 20261111T06:00Z cycle to 56.9°F in the 20261113T00:00Z — a move of +8.2°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 Tuesday at 21Z
api.weather.city /v1/history (nbm-qmd)
8.2 °F normal 0.0 °F · 2 of 7
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
3.2 °F normal 8.2 °F
current run
Milepost
1681 · laid 2026-11-13T10:25:31Z
Model
nbm-qmd · cycle 20261113T00:00Z
Desk
revision v1
Method
the same valid time read from successive synoptic cycles; the move is last run minus first run
Stores
https://api.weather.city/v1/history
Tagged
I-500 Daily Weather · New York, New York (40.713, -74.006) · by rule, at build
Digest
87a46ebc2aab0d05f04250b18373ca4fe07d60f4ce10fd690fd0220ddfbfbffd