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Milepost
1346

TheForecast Post

A chronicle of American weather and climate  ·  Saturday, 10 October 2026

Denver, Colorado Revisions MILEPOST 1346

Denver's forecast for Thursday has moved 8°F colder

68°F in the 20261008T06:00Z run, 60°F in the 20261010T00:00Z — the 3rd-largest revision of the 9 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 15°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, October 15 at 00Z in Denver, that trail runs from 68.2°F in the 20261008T06:00Z cycle to 59.9°F in the 20261010T00:00Z — 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 Thursday at 00Z
api.weather.city /v1/history (nbm-qmd)
-8.3 °F normal 0.0 °F · 3 of 9
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
15.4 °F normal 8.3 °F
current run
Milepost
1346 · laid 2026-10-10T10:25:12Z
Model
nbm-qmd · cycle 20261010T00:00Z
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
d9a511a2ca6f42f97235495544b321f877da6c9b80ee761a4d7ba53f5d95e0e6
Machine
JSON