Special Marine Warning for Lake Michigan from Sheboygan to Port Washington WI
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NWS Milwaukee/Sullivan WI issued a Special Marine Warning for Lake Michigan nearshore and open waters from Sheboygan to Port Washington WI until 3:15 AM CDT due to a severe thunderstorm.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Michigan near Sheboygan to Port Washington WI
- Issued
- September 4, 2026
- Issuing authority
- NWS Milwaukee/Sullivan WI
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Special Marine Warning issued by NWS Milwaukee/Sullivan WI. Effective from September 4, 2026 at 1:17 AM CDT until September 4, 2026 at 3:15 AM CDT.
Affected Areas
Sheboygan to Port Washington WI; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake. Locations impacted include Port Washington.
What You Should Do
Boaters should seek safe harbor immediately until this storm passes.
Expected Conditions
Wind gusts 34 knots or greater and large hail. High waves, dangerous lightning, and heavy rain are possible.
Timeline
Alert effective September 4, 2026 at 1:17 AM CDT. Expires September 4, 2026 at 3:15 AM CDT. A severe thunderstorm was located 11 nm northwest of Oostburg, or 12 nm west of Sheboygan, moving southeast at 20 knots.
Original source: NOAA Official Notice ↗
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (788 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 4, 2026.
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