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Milepost
1108

TheForecast Post

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

Kansas City, Missouri Revisions MILEPOST 1085

Kansas City's forecast for Saturday has moved 17°F warmer

69°F in the 20260912T18:00Z run, 86°F in the 20260914T12:00Z — the largest revision of any city on the roster. 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 Saturday, September 19 at 18Z in Kansas City, that trail runs from 69.0°F in the 20260912T18:00Z cycle to 85.7°F in the 20260914T12:00Z — a move of +16.7°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 Saturday at 18Z
api.weather.city /v1/history (nbm-qmd)
16.7 °F normal 0.0 °F · 1 of 9
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
19.4 °F normal 16.7 °F
current run
Milepost
1085 · laid 2026-09-14T22:25:12Z
Model
nbm-qmd · cycle 20260914T12:00Z
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
5e5addbd96e59f42dc7c8ff5b24b7af688dc5b4798b5fd5afcce08a74d00ba3e
Machine
JSON