Another way to check for ice-out on Lake Superior and lakes in the immediate vicinity is go to this website: http://coastwatch.glerl.noaa.gov/modis/modis.cgi/modis?region=s&page=1 They post 2 to 3 satellite images every day for the Lake Superior area. If it is cloudy, you may not be able to see what you are looking for.
If you want to go out on the big lake, check out this marine weather forecast site:
http://www.crh.noaa.gov/greatlakes/?c=map&l=ls&p=a&m=ws
You can zoom-in on the map for a more accurate forecast. To zoom-in the Canadian waters, you have to click on the American side of the international boundary. If you click on the Canadian side of the lake you will be sent to the Environment Canada marine forecast - it is not as accurate for near-shore weather.