SXUS08 KDTX 111111 OMRDTX GREAT LAKES WATER LEVELS NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 710 AM EDT FRI MAY 11 2012 THE FOLLOWING ARE THE AVERAGE LAKE LEVELS FORECAST FOR NEXT WEEK. LAKE LEVEL... INCHES FROM CHART DATUM SUPERIOR -6 MICHIGAN AND HURON 1 ST CLAIR 22 ERIE 31 ONTARIO 30 $$ BT