Edition 2026-10-19 The Ledger Archive API RSS Weather Trader
Milepost
1437

TheForecast Post

A chronicle of American weather and climate  ·  Monday, 19 October 2026

Dallas, Texas Revisions MILEPOST 1436

Dallas's forecast for Monday has moved 7°F warmer

57°F in the 20261017T06:00Z run, 65°F in the 20261019T00:00Z — the 2nd-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 2°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, October 19 at 14Z in Dallas, that trail runs from 57.4°F in the 20261017T06:00Z cycle to 64.8°F in the 20261019T00:00Z — a move of +7.4°F across 8 runs.

The change is larger than the run's own 10th-to-90th percentile spread — the guidance did not merely narrow, it moved off its previous position.

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 Monday at 14Z
api.weather.city /v1/history (nbm-qmd)
7.4 °F normal 0.0 °F · 2 of 5
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
2.1 °F normal 7.4 °F
current run
Milepost
1436 · laid 2026-10-19T13:25:25Z
Model
nbm-qmd · cycle 20261019T00:00Z
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
9830d93f56c3d75499862acaa097489d20e3baedccfaed28b95471117580e82f
Machine
JSON