GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project
 National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970

 Site No. 113, Approximate Location: 46.01 N. Latitude, 83.90 W. Longitude
 Site Name  Watsons Reef                   on St. Marys River   
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 Year Mo Da   T1   T2   C1  T1C1 T2C1  C2  T1C2 T2C2  C3 T1C3 T2C3  IMAGE   Supplemental Information
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 1947  3 31   -1   -1   OW   -1   -1        -1   -1       -1   -1  330.TIF   TO DETOUR REEF                  
 1947  4  7   -1   -1   OW   -1   -1        -1   -1       -1   -1  331.TIF   TO DETOUR REEF                  

 1949  2 28   -1   -1   OW   -1   -1        -1   -1       -1   -1  526.TIF   TO DETOUR REEF                  

 1952  3 10   -1   -1   OW   -1   -1        -1   -1       -1   -1  369.TIF   TO DETOUR LIGHT                 
 1952  3 17   -1   -1   OW   -1   -1        -1   -1       -1   -1  370.TIF   TO DETOUR REEF                  

 1963  4  1   -1   -1   OW   -1   -1        -1   -1       -1   -1  461.TIF   BELOW WATSONS REEF              

 1968  4  1   -1   -1   OW   -1   -1        -1   -1       -1   -1  500.TIF   TO DETOUR                       
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 Ice thickness is in inches, -1 = no thickness reported, see report for ice conditon codes.
 T1 = ice thickness or part of a range if T2 is present,  C1 = primary condtion of ice.
 T1C1 = thickness of C1 or part of range if T2C1 is presnet.
 C2, T1C2, T2C2, C3, T1C3, T2C3 are secondary and ternary ice conditon and condition thickness.