Severe · Special Marine WarningThis alert has expired. It is kept for reference.
Special Marine Warning issued September 5 at 12:12AM EDT until September 5
Affecting St Joseph to South Haven MI; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake
In effect until: Sep 5, 2026, 5:45 AM
St Joseph to South Haven MI; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake
Likely impact; effects through 5:45 AM.
Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.
Read the original bulletin (official text)
SMWGRR The National Weather Service in Grand Rapids has issued a * Special Marine Warning for... Nearshore and Open Waters from St Joseph to South Haven MI... * Until 145 AM EDT. * At 1210 AM EDT, a strong thunderstorm was located 9 nm southwest of South Haven Light, moving east at 20 knots. Additional strong thunderstorms were located at mid lake, roughly 40 miles west of the South Haven Light. These storms were also moving east at 20 knots. HAZARD...Wind gusts to 40 knots and small hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... South Haven Light, St. Joseph Light, and St. Joseph.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™