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

 Site No. 039, Approximate Location: 46.87 N. Latitude, 88.42 W. Longitude
 Site Name  Keweenaw Harbor                on Lake Superior     
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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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 1949  3 21   -1   -1   LI   -1   -1   LF   -1   -1       -1   -1  345.TIF                                   

 1965  3 15   20   -1        -1   -1        -1   -1       -1   -1  476.TIF                                   
 1965  4  5   18   -1   SL   -1   -1   SC    4    6       -1   -1  479.TIF                                   
 1965  4 12   14   -1   CL   -1   -1   SL    6   -1   WT  -1   -1  480.TIF                                   
 1965  4 19   14   -1        -1   -1        -1   -1       -1   -1  481.TIF                                   

 1968  3  4   -1   -1   OW   -1   -1        -1   -1       -1   -1  520.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.