National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Showers and Thunderstorms from the Great Lakes into the Southern Plains

Frontal boundary and wave of low pressure will keep an active weather pattern from the Great Lakes region through the southern Plains the next couple of days. Isolated instances of severe thunderstorms and flash flooding are possible. Meanwhile, as summer comes to a close, above normal temperatures continue for central and eastern U.S. - especially for most of Puerto Rico with excessive heat. Read More >

Coastal Waters Forecast for Rock Island Passage to Sturgeon Bay WI (LMZ541) (Text-Only)
NWS Forecast for: Rock Island Passage to Sturgeon Bay WI (LMZ541)
Issued by: National Weather Service Green Bay, WI
Last Update: 1153 AM CDT Sun Sep 21 2025		Print



This Afternoon: S wind 5 to 10 kts. A chance of light showers and a slight chance of thunderstorms. Waves 1 to 3 ft.

Tonight: S wind around 5 kts veering SW after midnight. Patchy fog. A slight chance of light showers and thunderstorms. Waves 2 ft or less.

Monday: SW wind around 5 kts backing S in the afternoon. A chance of light showers. A chance of thunderstorms in the afternoon. Waves 2 ft or less.

Monday Night: S wind around 5 kts backing NE after midnight. A chance of light showers and thunderstorms in the evening. Waves 2 ft or less.






Zone Forecast: Rock Island Passage to Sturgeon Bay WI (LMZ541)

Visit your local NWS office at: https://www.weather.gov/grb