Wisconsin anglers, as well as students in the classroom, now have access to the latest available Great Lakes surface water temperature information via the Web.
The CoastWatch site captures daily National Oceanic and Atmospheric Administration (NOAA) satellite transmissions and presents the most current information as contour lines called isotherms. The maps are available for all five Great Lakes.
"Surface temperatures can change quickly with weather, winds, and lake currents. CoastWatch can help anglers save time and fuel searching for temperature breaks,” said Philip Moy, UW Sea Grant fisheries specialist.
Because these maps are updated frequently and are available year-round, the site can also be used as a real-time teaching tool for science classes.
Besides lakewide regional temperature maps, a zoom-in feature provides coverage of seven Wisconsin Great Lakes ports—Racine, Milwaukee, Sheboygan, Kewaunee, Sturgeon Bay, Washburn, and Superior. Coverage for each port spans a 25- to 30-mile radius so that detailed information for surrounding ports is available as well.