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 1070

Kansas City's forecast for Thursday has moved 10°F warmer

76°F in the 20260911T00:00Z run, 86°F in the 20260912T18:00Z — the 2nd-largest revision of the 6 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 Thursday, September 17 at 21Z in Kansas City, that trail runs from 76.4°F in the 20260911T00:00Z cycle to 86.3°F in the 20260912T18:00Z — a move of +9.9°F across 8 runs.

The change sits well inside the run's own spread, which is the guidance converging rather than reversing.

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 Thursday at 21Z
api.weather.city /v1/history (nbm-qmd)
9.9 °F normal 0.0 °F · 2 of 6
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
20.2 °F normal 9.9 °F
current run
Milepost
1070 · laid 2026-09-13T04:25:15Z
Model
nbm-qmd · cycle 20260912T18:00Z
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
59d31eb41c8a7a8d520684b6418bef65330d2015e656dd6daeb55e2503f67ec6
Machine
JSON