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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Agenda for Lake Michigan Technical Workshops

The Great Lakes Coastal Flood Study recently announced a series of Technical Workshops around the Great Lakes Basin. The agenda for the first batch of workshops is posted below.

The Agenda is also linked on the event listing of each Technical Workshop, and agendas for the rest of the Technical Workshops will be posted soon.

International Upper Great Lakes Study Progress Report

In 2007, the International Joint Commission launched a five-year study to look at future water levels in the upper Great Lakes and the options for regulating those levels to support the region’s economic and environmental interests. In the entire upper lakes basin, water levels are currently influenced through a regulation plan at the St. Marys River control structures at Sault Ste. Marie, where Lake Superior outflows have been regulated since 1914.

Please view the Progress Report from the International Upper Great Lakes Study at this link

More information about the International Upper Great Lakes Study on their website: http://www.iugls.org/

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