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Milepost
1435

TheForecast Post

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

Dallas, Texas Revisions MILEPOST 1434

Dallas's forecast for Monday has moved 8°F warmer

53°F in the 20261017T06:00Z run, 61°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 9°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Monday, October 19 at 13Z in Dallas, that trail runs from 53.1°F in the 20261017T06:00Z cycle to 60.6°F in the 20261019T00:00Z — a move of +7.6°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 Monday at 13Z
api.weather.city /v1/history (nbm-qmd)
7.6 °F normal 0.0 °F · 2 of 5
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
9.3 °F normal 7.6 °F
current run
Milepost
1434 · laid 2026-10-19T10:25:20Z
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
0fe58b7f8287caa5ba5ab05ebf840f1d486b0e189b30307c45a0548bbac9e70f
Machine
JSON