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Milepost
1108

TheForecast Post

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

Kansas City, Missouri Revisions MILEPOST 1084

Kansas City's forecast for Saturday has moved 14°F warmer

71°F in the 20260912T12:00Z run, 85°F in the 20260914T06:00Z — 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 70.8°F in the 20260912T12:00Z cycle to 85.2°F in the 20260914T06:00Z — a move of +14.4°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 Saturday at 18Z
api.weather.city /v1/history (nbm-qmd)
14.4 °F normal 0.0 °F · 1 of 8
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
19.4 °F normal 14.4 °F
current run
Milepost
1084 · laid 2026-09-14T17:25:15Z
Model
nbm-qmd · cycle 20260914T06:00Z
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
92a09da81c5ce64458b9aebd30ca07e86e94275ef7a017af11d0844081c52b14
Machine
JSON