Special Marine Warning Issued for Lake Michigan Waters from South Haven to Whitehall

Alert Details

The National Weather Service in Grand Rapids MI has issued a Special Marine Warning for the nearshore and open waters of Lake Michigan. This alert is in response to severe thunderstorms detected by radar that are capable of producing hazardous conditions for mariners.

Affected Areas

The warning covers the following geographic regions:

• Nearshore and Open Waters from South Haven to Whitehall, MI
• Lake Michigan from Grand Haven to Whitehall MI (5NM offshore to Mid Lake)
• Lake Michigan from Holland to Grand Haven MI (5NM offshore to Mid Lake)
• Lake Michigan from South Haven to Holland MI (5NM offshore to Mid Lake)
• Specific locations impacted include Grand Haven Light and Muskegon Light.

What You Should Do

Boaters and individuals in the affected areas are advised to move to safe harbor immediately. Stay in port or seek sheltered waters until the hazardous weather conditions have passed. Avoid remaining on the open water where structural damage from hail is possible.

Expected Conditions

• Hazard: Large hail.
• Impact: Large hail could result in structural damage to vessels.
• Storm Movement: At 8:12 PM EDT, severe thunderstorms were located along a line extending from 31 nm west of Grand Haven Light to 33 nm west of Saugatuck Pier Heads, moving northeast at 40 knots.

Timeline

The warning is effective immediately as of 8:12 PM EDT on March 10, 2026. The alert is currently scheduled to expire at 9:15 PM EDT.