Dense Fog in Northwest Pinal County, Arizona

Dense Fog December 24, 2023 · Northwest Pinal County, Arizona

What the National Weather Service wrote

Visibility of less than a quarter mile observed at the Ak-Chin Regional Airport in Casa Grande due to dense fog.

The wider storm

The combination of moist boundary layer conditions due to rainfall activity 36-48 hours prior and clear skies and near calm winds resulted in the development of widespread dense fog conditions during the early through mid-morning hours on the 24th. Many areas in the Phoenix metro area as well as southward into Pinal County reported visibilities of a quarter mile or less. Phoenix Sky Harbor Airport at one point had to perform a ground stop due to the low visibility.

Source: NOAA Storm Events Database, event 1153346. Narratives are written by the National Weather Service forecast office that issued the report.

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