Lakeshore Flood Warning Issued for Ontonagon County with Waves Up to 25 Feet Expected

Alert Details

A Lakeshore Flood Warning has been issued by the National Weather Service in Marquette, MI. The warning is in effect from late Sunday night through Monday afternoon as significant flooding is expected along the shoreline.

Affected Areas

This alert specifically impacts Ontonagon County in Michigan.

What You Should Do

Residents and travelers in the affected area are advised to take the following precautions:

• Take necessary actions to protect flood-prone property immediately.
• If travel is required, allow extra time as some roads may be closed due to flooding.
• Do not drive around barricades or through water of unknown depth.
• Avoid areas near the lake where wave action is most intense.

Expected Conditions

Significant lakeshore flooding is anticipated, driven by wave heights of 15 to 25 feet. These conditions are expected to cause numerous road closures. Low-lying property, including parking lots, lawns, homes, and businesses near the lake, will likely be inundated. Additionally, some shoreline erosion is expected to occur due to the severity of the wave action.

Timeline

The Lakeshore Flood Warning begins at 11:00 PM EDT on Sunday, March 15, 2026. The hazardous conditions are expected to persist until the warning expires at 5:00 PM EDT on Monday, March 16, 2026.