Welcome to the official site for FEMA's Great Lakes Coastal Flood Study, the comprehensive storm and wind study of the Great Lakes basin for the purpose of updating the coastal flood hazard information and Flood Insurance Rate Maps (FIRM) for Great Lakes coastal communities. Below you’ll find a list of the most recent meetings with their agendas, links to preliminary maps, and presentations. To the left you’ll find additional Great Lakes Coastal Flood Study content.

FEMA created this new, self-guided tutorial on coastal flood mapping that provides important information to coastal communities and their residents. FEMA’s “Coastal Hazards and Coastal Mapping: A Visual Guide” is a glossary of coastal mapping terms and a companion to the tutorial.

View all posts by lake: Lake Superior | Lake Michigan | Lake Huron | Lake St. Clair | Lake Erie | Lake Ontario

View all posts by state: Minnesota | Wisconsin | Illinois | Indiana | Michigan | Ohio | Pensylvania | New York

Please also visit FEMA's Preliminary Flood Hazard Data page and FEMA's Pending and Preliminary Flood Hazard Layer mapping application.

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Updated Fact Sheets

Wave Hazards and VE Zones on the Great Lakes Fact Sheet:

The Letter of Map Revision Process Fact Sheet:

Using LiDAR for Map Amendments Fact Sheet:

Understanding Risks Along the Great Lakes: The Impact of Coastal Armoring Structures on Flood Hazards Fact Sheet:

Coastal Flood Risks and Floodplain Mapping in Lake St. Clair Fact Sheet:

The fact sheets above are posted on the Fact Sheets page.

Storm Surge and Wave Modeling Fact Sheet Released

Great Lakes Coastal Flood Study announces the release of a new fact sheet. The fact sheet summarizes the storm surge and wave modeling processes used for the Great Lakes Coastal Flood Study.

The Fact Sheet above is posted on the Fact Sheet page.

Outreach Page Expanded at GreatLakesCoast.org

We’ve expanded the Outreach Page of GreatLakesCoast.org!

The Outreach Page now contains the following sub-sections:

Please check out the new sections using the links above or go to the Outreach Page to see an overview of what each section is about. Thanks!

New Fact Sheets Released

Great Lakes Coastal Flood Study announces the release of two new fact sheets. The first fact sheet summarizes the Great Lakes Coastal Flood Study. The second fact sheet discusses water levels on the Great Lakes:

The Fact Sheets above are posted on the Fact Sheet page.

Great Lakes Coastal Flood Study (GLCFS)

If you are new to the site, start at Great Lakes Coastal Analysis & Mapping or use the links on the left to jump into the information on the Great Lakes Coastal Flood Study (GLCFS).

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