Edition 2026-09-16 The Ledger Archive API RSS Weather Trader
Milepost
1108

TheForecast Post

A chronicle of American weather and climate  ·  Wednesday, 16 September 2026

Kansas City, Missouri Revisions MILEPOST 1105

Kansas City's forecast for Friday has moved 9°F colder

77°F in the 20260913T18:00Z run, 68°F in the 20260915T18:00Z — 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 15°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 25 at 00Z in Kansas City, that trail runs from 76.5°F in the 20260913T18:00Z cycle to 67.7°F in the 20260915T18:00Z — a move of -8.8°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 Friday at 00Z
api.weather.city /v1/history (nbm-qmd)
-8.8 °F normal 0.0 °F · 3 of 6
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
14.8 °F normal 8.8 °F
current run
Milepost
1105 · laid 2026-09-16T05:25:12Z
Model
nbm-qmd · cycle 20260915T18:00Z
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
bb8151337616bfca0939d12caa8584a05e0cd2805816db0be2c02c383b4b0c06
Machine
JSON