Wisconsin Weather Alert: 1–3 Inches Rain Risk Today in Green Bay, Flooding Threat Through Saturday Morning

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Wisconsin – Headlights glow through dense fog this morning, but the bigger concern builds fast as soaking rain and storms move toward Green Bay by afternoon.

According to the National Weather Service in Green Bay, a Dense Fog Advisory remains in place through mid-morning with visibility near 0.25 miles in some areas. A Flood Watch then takes over beginning at 1 p.m., lasting into Saturday morning, as multiple rounds of rain and storms move in .

Rain develops by mid to late afternoon, with thunderstorms likely into the evening. Rainfall totals between 0.50 and 1 inch are expected, with localized amounts up to 3 inches possible. That kind of rain falling on already saturated ground could quickly overwhelm drainage systems, especially in urban areas like Green Bay, Appleton, and Manitowoc.

Drivers along I-41, US-41, and Highway 172 should expect reduced visibility, ponding water, and slower travel during heavier downpours. Plan extra time and avoid flooded roadways. Keep phones charged in case of isolated outages as storms pass through.

By Saturday morning, colder air filters in. Rain may briefly mix with wet snow before ending, especially in northern areas. While accumulation looks limited, the shift signals a sharp drop in temperatures.

Sunday turns brighter but much cooler, with highs only in the mid-40s. Overnight lows dip into the 20s, raising concerns for frost and even a brief freeze. Gardeners should take action to protect early plants.

Early next week trends quieter, with sunshine returning and temperatures gradually rebounding into the 50s and 60s.

Five Day Outlook for Green Bay, Wisconsin:
Saturday: Slight rain/snow mix early, high 46°F
Sunday: Mostly sunny, high 45°F
Monday: Sunny, high 51°F
Tuesday: Mostly sunny, high 66°F
Wednesday: Sunny, high 63°F