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

Alert Details

The National Weather Service in Grand Rapids has issued a Special Marine Warning for the nearshore and open waters of Lake Michigan. This alert was issued at 9:54 PM EDT on March 10, 2026, following radar detection of severe weather moving through the area.

Affected Areas

The warning covers the following geographic regions and coastal points:

• 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 expected to be impacted include Mona Lake Channel, Grand Haven Light, Muskegon Light, and Holland Light.

What You Should Do

Mariners are advised to move to safe harbor immediately. Stay in port or find a secure location until the hazardous weather conditions have passed. Avoid remaining on the open water during this warning period.

Expected Conditions

At 9:54 PM EDT, severe thunderstorms were located along a line extending from 21 nm west of Grand Haven Light to 29 nm west of Saugatuck Pier Heads. These storms are moving northeast at 50 knots.

• Hazard: Large hail.
• Source: Radar indicated.
• Impact: Large hail could result in structural damage to vessels and equipment.

Timeline

The Special Marine Warning is effective immediately and is currently set to expire at 11:30 PM EDT on March 10, 2026.