Edition 2026-10-08 The Ledger Archive API RSS Weather Trader
Milepost
1327

TheForecast Post

A chronicle of American weather and climate  ·  Thursday, 8 October 2026

Denver, Colorado Revisions MILEPOST 1327

Denver's forecast for Monday has moved 8°F warmer

73°F in the 20261006T12:00Z run, 81°F in the 20261008T06:00Z — 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 16°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, October 12 at 21Z in Denver, that trail runs from 73.0°F in the 20261006T12:00Z cycle to 81.4°F in the 20261008T06:00Z — a move of +8.4°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 Monday at 21Z
api.weather.city /v1/history (nbm-qmd)
8.4 °F normal 0.0 °F · 3 of 6
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
15.8 °F normal 8.4 °F
current run
Milepost
1327 · laid 2026-10-08T16:25:13Z
Model
nbm-qmd · cycle 20261008T06:00Z
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
8cada9b57f0500a2f38afcb3b952a173607a0217dbd1f672df86c3d437061374
Machine
JSON