Dense Fog in Massac, Illinois
Dense Fog November 22, 2025 – November 23, 2025 · Massac, Illinois
The wider storm
Surface high pressure nosed eastward across southern Illinois. The resultant clear and calm conditions allowed dense fog to develop, generally to the south of Interstate 64.
Source: NOAA Storm Events Database, event 1301759. Narratives are written by the National Weather Service forecast office that issued the report.
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