GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 309, Approximate Location: 43.78 N. Latitude, 86.43 W. Longitude Site Name Pentwater Harbor on Lake Michigan ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1911 3 7 -1 -1 OW -1 -1 -1 -1 -1 -1 077.TIF 1912 3 12 24 -1 -1 -1 -1 -1 -1 -1 083.TIF 1912 3 19 24 -1 -1 -1 -1 -1 -1 -1 084.TIF 1913 3 4 14 -1 -1 -1 -1 -1 -1 -1 090.TIF 1913 3 11 16 -1 -1 -1 -1 -1 -1 -1 091.TIF 1913 3 18 9 -1 RT -1 -1 -1 -1 -1 -1 092.TIF 1913 4 1 -1 -1 OW -1 -1 -1 -1 -1 -1 094.TIF 1933 3 14 10 -1 -1 -1 -1 -1 -1 -1 221.TIF 1934 3 6 18 -1 -1 -1 -1 -1 -1 -1 228.TIF 1934 3 13 16 -1 -1 -1 -1 -1 -1 -1 229.TIF 1934 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 229.TIF GOVERNMENT CHANNEL 1935 3 26 3 -1 -1 -1 -1 -1 -1 -1 240.TIF 1936 3 17 9 18 -1 -1 -1 -1 -1 -1 245.TIF 1937 3 8 8 -1 -1 -1 -1 -1 -1 -1 254.TIF 1939 3 6 12 18 -1 -1 -1 -1 -1 -1 268.TIF 1939 3 20 -1 -1 HF -1 -1 DI -1 -1 PI -1 -1 270.TIF 1940 3 11 -1 -1 BK -1 -1 -1 -1 -1 -1 278.TIF 1940 3 24 -1 -1 SI -1 -1 DI -1 -1 -1 -1 280.TIF 1942 3 9 5 -1 -1 -1 -1 -1 -1 -1 292.TIF 1943 3 8 12 -1 -1 -1 -1 -1 -1 -1 299.TIF 1943 3 15 10 -1 -1 -1 -1 -1 -1 -1 300.TIF 1943 3 22 8 -1 -1 -1 -1 -1 -1 -1 301.TIF 1943 3 29 10 -1 RT -1 -1 -1 -1 -1 -1 302.TIF 1944 3 13 7 -1 -1 -1 -1 -1 -1 -1 309.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.