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

Minneapolis, Minnesota Revisions MILEPOST 1102

Minneapolis's forecast for Friday has moved 14°F colder

75°F in the 20260914T00:00Z run, 62°F in the 20260915T18:00Z — the largest revision of any city on the roster.

Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, September 18 at 21Z in Minneapolis, that trail runs from 75.2°F in the 20260914T00:00Z cycle to 61.6°F in the 20260915T18:00Z — a move of -13.6°F across 8 runs.

This run family does not publish percentiles at this valid time, so the change is reported without a spread to judge it against.

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 21Z
api.weather.city /v1/history (nbm-qmd)
-13.6 °F normal 0.0 °F · 1 of 5
8 synoptic cycles
Milepost
1102 · laid 2026-09-16T04:25:13Z
Model
nbm-qmd · cycle 20260915T18:00Z
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
c56882498578ca9516abbfb59fb4ff3c2601c7ca1489468945617d4a93d312ba
Machine
JSON