I have been searching the internet for information about the flooding in the Big Stone Lake Area. Here are a few sources which seem to be the best local sources of information.

This site has updates from the Upper MN Watershed district along with many pictures:
http://bigstonewalleyeclub.wordpress.com/floodice-out-updates/

This site links to the NWS and a graph of the lake levels which is updated every few hours:
http://www.crh.noaa.gov/ahps2/hydrograph.php?wfo=abr&gage=bsts2&view=1,1,1,1,1,1,1,1