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

 Site No. 156, Approximate Location: 45.05 N. Latitude, 83.43 W. Longitude
 Site Name  Thunder Bay Island Harbor, MI  on Lake Huron        
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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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 1912  3 26   26   -1        -1   -1        -1   -1       -1   -1  085.TIF                                   

 1914  3  3   -1   -1   OW   -1   -1        -1   -1       -1   -1  098.TIF                                   

 1916  3  7    2   -1        -1   -1        -1   -1       -1   -1  113.TIF                                   
 1916  3 28    5   -1        -1   -1        -1   -1       -1   -1  116.TIF                                   

 1918  3  5   30   -1        -1   -1        -1   -1       -1   -1  128.TIF                                   

 1947  3 31   -1   -1   DI   -1   -1        -1   -1       -1   -1  330.TIF                                   
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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.