Edition 2026-10-03 The Ledger Archive API RSS Weather Trader
Milepost
1281

TheForecast Post

A chronicle of American weather and climate  ·  Saturday, 3 October 2026

Dallas, Texas Revisions MILEPOST 1279

Dallas's forecast for Friday has moved 13°F colder

92°F in the 20261001T18:00Z run, 80°F in the 20261003T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 13°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, October 9 at 21Z in Dallas, that trail runs from 92.2°F in the 20261001T18:00Z cycle to 79.6°F in the 20261003T12:00Z — a move of -12.6°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 Friday at 21Z
api.weather.city /v1/history (nbm-qmd)
-12.6 °F normal 0.0 °F · 1 of 8
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
12.8 °F normal 12.6 °F
current run
Milepost
1279 · laid 2026-10-03T22:25:13Z
Model
nbm-qmd · cycle 20261003T12:00Z
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
6300d2d4fadf90ffe2e1b9420636173805208a0ed3800b0cacce04cededbf4cb
Machine
JSON