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 1063

Kansas City's forecast for Friday has moved 12°F warmer

58°F in the 20260910T12:00Z run, 69°F in the 20260912T06:00Z — the 2nd-largest revision of the 10 cities on the roster that moved at all. 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 Friday, September 18 at 12Z in Kansas City, that trail runs from 57.8°F in the 20260910T12:00Z cycle to 69.3°F in the 20260912T06:00Z — a move of +11.5°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)
11.5 °F normal 0.0 °F · 2 of 10
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
20.3 °F normal 11.5 °F
current run
Milepost
1063 · laid 2026-09-12T16:25:14Z
Model
nbm-qmd · cycle 20260912T06:00Z
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
bde5a541d7f845391ce4db1a648eb9cbbc33cc6f6215db949fb75cd6c6425e03
Machine
JSON