Dense Fog — Williamson, Illinois

2025-01-30 to 2025-01-31 · Williamson, Illinois

Wider weather episode

Following a period of evening rain and drizzle, dense fog developed overnight in much of Southern Illinois, with fog lingering along the I-64 corridor until around sunrise. Visibility improved as low clouds moved over the region.

Source: NOAA Storm Events Database, event_id 1229528. Narrative written by the NWS forecast office that issued the report.