Special Marine Warning Issued for Lake Michigan from Sheboygan WI to Winthrop Harbor IL
This alert is no longer in effect.
NOAA issued it on August 9, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Milwaukee/Sullivan has issued a Special Marine Warning for Lake Michigan nearshore and open waters from Sheboygan WI to Winthrop Harbor IL until 12:30 PM CDT due to strong thunderstorms with wind gusts 34 knots or greater and small hail.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Michigan near Wisconsin and Illinois
- Issued
- August 9, 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: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Lake Michigan near Wisconsin and Illinois.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Milwaukee/Sullivan WI. The alert is effective from August 9 at 10:57 AM CDT until August 9 at 12:30 PM CDT.
Affected Areas
The warning covers Lake Michigan nearshore and open waters to mid lake from Sheboygan WI to Winthrop Harbor IL, including the zones Sheboygan to Port Washington WI; Port Washington to North Point Light WI; North Point Light to Wind Point WI; and Wind Point WI to Winthrop Harbor IL. Locations impacted include Port Washington, Milwaukee, Racine, and Kenosha.
What You Should Do
Move to safe harbor until hazardous weather passes.
Expected Conditions
At 10:56 AM CDT, strong thunderstorms were located along a line extending from 6 nm west of Port Washington to 33 nm northwest of McHenry, moving east at 40 knots. Hazards include wind gusts 34 knots or greater and small hail.
Timeline
The alert is in effect from 10:57 AM CDT on August 9, 2026, and expires at 12:30 PM CDT on August 9, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (1,024 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 9, 2026.
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Common questions about this NWS weather alert.