Special Marine Warning Issued for Lake Michigan from Port Washington WI to Winthrop Harbor IL
This alert is no longer in effect.
NOAA issued it on July 3, 2026, 7 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 waters until 4:45 PM CDT due to severe thunderstorms capable of producing waterspouts.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Michigan near Port Washington WI to Winthrop Harbor IL
- Issued
- July 3, 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 7 weeks ago; use the issuing agency's live warning service for current conditions in Lake Michigan near Port Washington WI to Winthrop Harbor IL.
Alert Details
A Special Marine Warning has been issued by the National Weather Service Milwaukee/Sullivan WI. The alert is effective from 2:40 PM CDT on June 10, 2026, until 4:45 PM CDT on June 10, 2026.
Affected Areas
The warning covers Lake Michigan nearshore and open waters to mid lake from Port Washington WI to Winthrop Harbor IL, including the zones Port Washington to North Point Light WI; North Point Light to Wind Point WI; Wind Point WI to Winthrop Harbor IL; and the corresponding 5NM offshore to mid lake areas (LMZ644, LMZ645, LMZ646, LMZ671, LMZ673, LMZ675).
What You Should Do
Avoid the warned area. Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves.
Expected Conditions
Severe thunderstorms capable of producing waterspouts are located along a line extending from 29 nm southwest of Oshkosh to 31 nm west of Milwaukee to 24 nm west of Elgin, moving east at 45 knots. Hazards include waterspouts, wind gusts in excess of 50 knots, and small hail.
Timeline
The alert is in effect from 2:40 PM CDT until 4:45 PM CDT on June 10, 2026. Severe thunderstorms will remain over mainly open waters.
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 (1,262 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 3, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.