Coastal Flooding

Coastal flooding affects all of Wisconsin's coastal communities to some degree, but is more prevalent when storms occur in low-lying areas during periods of high water levels. These resources help local officials and property owners better address coastal flooding.


Lake Level Viewer

This interactive map visualizes the extent of rising and falling water levels along the shores of the Great Lakes from six feet about average lake levels to six feet below in one foot increments. It includes the ability to explore the impact of rising water levels on vulnerable populations and businesses. Only areas with existing topographic and bathymetric lidar data are mapped. This leaves out some areas of the Wisconsin shore.
NOAA Office for Coastal Management

View the map...


Elevation Data

Find elevation data (including integrated topographic/bathymetric data from the U.S. Interagency Elevation Inventory.


Flood Hazard Zones

Find flood hazard zones from the FEMA National Flood Hazard Layer.


Great Lakes Water Levels Dashboard

The dashboard visualizes current, historical, projected Great Lakes water levels. A companion hydro-climate dashboard visualize water levels along with data on drivers behind water level change. 
NOAA Great Lakes Environmental Research Laboratory

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Applying Tools to Visualize Coastal Flooding, Brown County

This case study in the Great Lakes Coastal Resilience Planning Guide demonstrates how to develop coastal flooding visualizations and share them with coastal property owners for understanding the causes of flooding hazards such as storms or lake levels and changes related to future climate conditions.
Association of State Floodplain Managers as part of the NOAA Digital Coast Partnership

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Great Lakes Water Levels Forecasts

Water level forecasts are published on a weekly and monthly basis. The weekly forecast provides an update on current water levels conditions, weather, and outflows and a forecast of water levels over the next month. The monthly bulletin provides a six month forecast.
U.S. Army Corps of Engineers

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Great Lakes Coastal Flood Study

This website provides official information for FEMA's comprehensive storm and wind study of the Great Lakes basin for the purpose of updating the coastal flood hazard information and maps for Great Lakes coastal communities.
Federal Emergency Management Agency

View the web site...
University of Wisconsin Sea Grant Institute, 1975 Willow Drive FL 2, Madison, WI 53706-1177 ph 608-262-0905
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