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Milepost
1501

TheForecast Post

A chronicle of American weather and climate  ·  Monday, 26 October 2026

Salt Lake City, Utah Revisions MILEPOST 1501

Salt Lake City's forecast for Tuesday has moved 6°F colder

55°F in the 20261024T00:00Z run, 48°F in the 20261025T18:00Z — the 3rd-largest revision of the 4 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 14°F.

Successive cycles do not merely refresh a forecast; they leave a trail. For Tuesday, November 3 at 00Z in Salt Lake City, that trail runs from 54.8°F in the 20261024T00:00Z cycle to 48.5°F in the 20261025T18:00Z — a move of -6.3°F across 8 runs.

The change sits well inside the run's own spread, which is the guidance converging rather than reversing.

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 Tuesday at 00Z
api.weather.city /v1/history (nbm-qmd)
-6.3 °F normal 0.0 °F · 3 of 4
8 synoptic cycles
10th-to-90th percentile spread at that hour
api.weather.city (nbm-qmd)
13.8 °F normal 6.3 °F
current run
Milepost
1501 · laid 2026-10-26T04:25:24Z
Model
nbm-qmd · cycle 20261025T18:00Z
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
ea6202327b8ef7b4a1bdf54303e9552f1e298864f2e3f4ee1364fdc673d46c2b
Machine
JSON