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

 Site No. 005, Approximate Location: 48.43 N. Latitude, 89.25 W. Longitude
 Site Name  Lakehead                       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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 1950  3 13   -1   -1   SO   -1   -1        -1   -1       -1   -1  351.TIF   TO PIE ISLAND                   

 1951  2 26   -1   -1   SO   -1   -1        -1   -1       -1   -1  359.TIF   TO ISLE ROYALE                  

 1953  2 24   -1   -1   BK   -1   -1        -1   -1       -1   -1  375.TIF   TO ISLE ROYALE                  

 1963  4 15   -1   -1   FS   -1   -1        -1   -1       -1   -1  463.TIF   TO THUNDER CAPE                 
 1963  4 22   -1   -1   BK   -1   -1        -1   -1       -1   -1  464.TIF   LAKEHEAD HARBOR: CHANNEL (CUT)  

 1965  3 29   29   -1        -1   -1        -1   -1       -1   -1  478.TIF   LAKEHEAD HARBOR                 
 1965  4 26   -1   -1   BK   -1   -1        -1   -1       -1   -1  482.TIF   ALL CHANNELS                    

 1968  2 26   35   -1        -1   -1        -1   -1       -1   -1  521.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.