Active Weather Alerts
Special Weather Statement
Issued: 3:48 AM Aug. 19, 2026 – National Weather Service
...AREAS OF FOG DEVELOPING IN SOUTH CENTRAL WI... Fog developed in the Rock River Valley from Watertown to Janesville, Horicon Marsh, and portions of Fond du Lac County. The fog is gradually expanding eastward. Expect visibility of 1 mile or less in low-lying areas. If traveling, use low beam headlights and slow down when encountering sudden drops in visibility.
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