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

 Site No. 189, Approximate Location: 44.25 N. Latitude, 83.45 W. Longitude
 Site Name  Tawas City Harbor              on Lake Huron        
 ----------------------------------------------------------------------------------------------------------
 Year Mo Da   T1   T2   C1  T1C1 T2C1  C2  T1C2 T2C2  C3 T1C3 T2C3  IMAGE   Supplemental Information
 ----------------------------------------------------------------------------------------------------------
 1969  2 24   40   -1        -1   -1        -1   -1       -1   -1  503.TIF                                   
 1969  3  3   20   -1        -1   -1        -1   -1       -1   -1  504.TIF   (60% ICE COVER)                 
 1969  3 10   34   -1        -1   -1        -1   -1       -1   -1  505.TIF   (60% ICE COVER)                 
 1969  3 17   33   -1        -1   -1        -1   -1       -1   -1  506.TIF                                   
 1969  3 24   29   -1        -1   -1        -1   -1       -1   -1  507.TIF                                   
 ----------------------------------------------------------------------------------------------------------
 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.