Severe · Special Marine WarningThis alert has expired. It is kept for reference.
Special Marine Warning issued September 4 at 1:17AM CDT until September 4
Affecting Sheboygan to Port Washington WI; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake
In effect until: Sep 4, 2026, 8:15 AM
Sheboygan to Port Washington WI; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake
Likely impact; effects through 8:15 AM.
Boaters should seek safe harbor immediately until this storm passes. Wind gusts 34 knots or greater, large hail, high waves, dangerous lightning, and heavy rain are possible with this storm.
Read the original bulletin (official text)
SMWMKX The National Weather Service in Milwaukee/Sullivan has issued a * Special Marine Warning for... Lake Michigan nearshore and open waters to mid lake from Sheboygan WI to Port Washington WI... * Until 315 AM CDT. * At 117 AM CDT, a severe thunderstorm was located 11 nm northwest of Oostburg, or 12 nm west of Sheboygan, moving southeast at 20 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. * Locations impacted include... Port Washington.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™