Edition 2026-10-18 The Ledger Archive API RSS Weather Trader
Milepost
1424

TheForecast Post

A chronicle of American weather and climate  ·  Sunday, 18 October 2026

Dallas, Texas Revisions MILEPOST 1423

Dallas's forecast for Sunday has moved 10°F warmer

62°F in the 20261016T06:00Z run, 72°F in the 20261018T00:00Z — the 2nd-largest revision of the 8 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 10°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Sunday, October 18 at 16Z in Dallas, that trail runs from 62.2°F in the 20261016T06:00Z cycle to 71.8°F in the 20261018T00:00Z — a move of +9.5°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 Sunday at 16Z
api.weather.city /v1/history (nbm-qmd)
9.5 °F normal 0.0 °F · 2 of 8
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
10.5 °F normal 9.5 °F
current run
Milepost
1423 · laid 2026-10-18T10:25:18Z
Model
nbm-qmd · cycle 20261018T00:00Z
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
be79c1019d04da6c0d02c1a509f7873f51e6f2780d1a05a058f0b7f48c700343
Machine
JSON