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Milepost
1253

TheForecast Post

A chronicle of American weather and climate  ·  Wednesday, 30 September 2026

Kansas City, Missouri Revisions MILEPOST 1253

Kansas City's forecast for Saturday has moved 7°F colder

59°F in the 20260928T12:00Z run, 52°F in the 20260930T06:00Z — the 3rd-largest revision of the 5 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 9°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Saturday, October 3 at 09Z in Kansas City, that trail runs from 58.9°F in the 20260928T12:00Z cycle to 51.7°F in the 20260930T06:00Z — a move of -7.2°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 09Z
api.weather.city /v1/history (nbm-qmd)
-7.2 °F normal 0.0 °F · 3 of 5
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
9 °F normal 7.2 °F
current run
Milepost
1253 · laid 2026-09-30T16:25:15Z
Model
nbm-qmd · cycle 20260930T06:00Z
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
91fc1770a2362c0c53d77896e5d5673571a52f10378fc184bc512c9af2c1faf0
Machine
JSON