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Milepost
1380

TheForecast Post

A chronicle of American weather and climate  ·  Wednesday, 14 October 2026

Denver, Colorado Revisions MILEPOST 1378

Denver's forecast for Thursday has moved 9°F warmer

58°F in the 20261012T06:00Z run, 67°F in the 20261014T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 20°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, October 22 at 18Z in Denver, that trail runs from 57.7°F in the 20261012T06:00Z cycle to 67.1°F in the 20261014T00:00Z — a move of +9.4°F across 8 runs.

The change sits well inside the run's own spread, which is the guidance converging rather than reversing.

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 18Z
api.weather.city /v1/history (nbm-qmd)
9.4 °F normal 0.0 °F · 1 of 7
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
20.4 °F normal 9.4 °F
current run
Milepost
1378 · laid 2026-10-14T10:25:16Z
Model
nbm-qmd · cycle 20261014T00:00Z
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
79587936d57ee00eaa0aecbb23856ae9cfd7709be03acd69a916643c4327bbe7
Machine
JSON