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 1046

Kansas City's forecast for Friday has moved 10°F colder

68°F in the 20260908T18:00Z run, 58°F in the 20260910T12:00Z — 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 19°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 18 at 12Z in Kansas City, that trail runs from 68.1°F in the 20260908T18:00Z cycle to 57.8°F in the 20260910T12:00Z — a move of -10.3°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 Friday at 12Z
api.weather.city /v1/history (nbm-qmd)
-10.3 °F normal 0.0 °F · 3 of 9
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
19.4 °F normal 10.3 °F
current run
Milepost
1046 · laid 2026-09-10T22:25:17Z
Model
nbm-qmd · cycle 20260910T12:00Z
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
198ae985619e8eafd71c27193ea3ce25eb3b73e30f1ba8b4b4e087b6395aee57
Machine
JSON