Dense Smoke Advisory Until 7 PM Friday, July 17 (Two Rivers to Sheboygan) — NWS Lake Michigan Nearshore

Sheboygan County, WI — Friday, Jul 17, 2026.

Marine alert for Two Rivers to Sheboygan waters (through 7 PM CDT Friday)

The National Weather Service reported a Dense Smoke Advisory for Lake Michigan nearshore waters in marine zone LMZ543—including “Sturgeon Bay to Two Rivers” and “Two Rivers to Sheboygan.” The advisory was issued at 1028 AM CDT Friday, July 17, 2026 and is in effect until 7 PM CDT Friday, July 17.

What NWS says will happen

• Visibility: Dense smoke may reduce visibility to less than 1 nautical mile.
• Impact: Low visibility will make navigation difficult.

If you’re on the water, here’s the practical checklist

• Proceed with caution.
• Use proper fog signals.
• Make sure running lights are on.
• Use radar and compass as conditions require.

Check the latest NWS marine zone information for LMZ543 before you head out—especially if you’re traveling during the advisory window.

If you’re boating this evening, share what you’re seeing with other local readers—send feedback to the newsroom via Sheboygan Life’s Publicize page.

Sources

• NWS Marine Forecast (LMZ543) — Dense Smoke Advisory in effect through 7 PM CDT
• NWS Marine and Coastal Hazard Criteria — example preparedness actions for dense fog