Special Marine Warning for Lake Michigan from Sheboygan to Port Washington

Source: NOAA · Lake Michigan near Sheboygan and Port Washington, Wisconsin

If you are in immediate danger, call emergency services now.

For real-time, official alerts and instructions for your exact location, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia) as applicable. This article is a data summary, not a substitute for the issuing agency's live warning.

Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.

A Special Marine Warning is in effect for Lake Michigan areas from Sheboygan to Port Washington until 2:30 AM CDT, with strong thunderstorms featuring wind gusts of 34 knots or greater and small hail.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on May 13, 2026 and geographically references Lake Michigan near Sheboygan and Port Washington, Wisconsin. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Special Marine Warning, Lake Michigan) map to related alerts in the same area of risk - browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Special Marine Warning Alert

Alert Details

This Special Marine Warning has been issued by the National Weather Service (NWS) Milwaukee/Sullivan WI. It is effective from 12:22 AM CDT on April 14, 2026.

Affected Areas

The warning covers Sheboygan to Port Washington in Wisconsin, as well as Lake Michigan from Sheboygan to Port Washington WI, extending 5 nautical miles offshore to mid-lake.

What You Should Do

Avoid the affected waters due to the potential for damaging winds and suddenly higher waves.

Expected Conditions

A strong thunderstorm is producing wind gusts of 34 knots or greater and small hail. The storm is located 15 nautical miles east of Sheboygan and moving east at 50 knots.

Timeline

The warning is effective from 12:22 AM CDT on April 14, 2026, until 2:30 AM CDT on the same day.

Original source: NOAA Official Notice ↗

All Weather Alerts →

Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
A Special Marine Warning is in effect for Lake Michigan areas from Sheboygan to Port Washington until 2:30 AM CDT, with strong thunderstorms featuring wind gusts of 34 knots or greater and small hail.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Lake Michigan near Sheboygan and Port Washington, Wisconsin. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.