GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 158, Approximate Location: 45.03 N. Latitude, 83.33 W. Longitude Site Name Thunder Bay Harbor, MI on Lake Huron ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1917 3 6 11 -1 -1 -1 -1 -1 -1 -1 120.TIF 1946 3 4 9 -1 SO -1 -1 -1 -1 -1 -1 318.TIF 1947 3 17 -1 -1 OW -1 -1 -1 -1 -1 -1 328.TIF 1948 3 1 18 -1 SO -1 -1 -1 -1 -1 -1 334.TIF 1950 3 27 20 -1 DI -1 -1 -1 -1 -1 -1 353.TIF 1959 3 16 -1 -1 OW -1 -1 -1 -1 -1 -1 426.TIF 1965 3 1 12 -1 FS -1 -1 WI -1 -1 -1 -1 474.TIF 1965 3 15 -1 -1 OW -1 -1 -1 -1 -1 -1 476.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.