GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 222, Approximate Location: 45.86 N. Latitude, 84.87 W. Longitude Site Name St. Helena Island on Lake Michigan ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1925 4 7 -1 -1 SW -1 -1 -1 -1 -1 -1 174.TIF SOUTHWARD 1943 4 12 -1 -1 IP -1 -1 BV -1 -1 -1 -1 304.TIF WESTWARD 1944 3 6 -1 -1 HF -1 -1 WI -1 -1 -1 -1 308.TIF ISLAND TO OLD MACKINAC POINT 1944 3 6 10 20 -1 -1 -1 -1 -1 -1 308.TIF ISLAND TO WHITE SHOALS 1947 4 21 -1 -1 LF -1 -1 DI -1 -1 -1 -1 333.TIF TO 6Mi E OF OLD MACKINAC POINT 1948 4 5 -1 -1 IP -1 -1 -1 -1 -1 -1 339.TIF TO WHITE SHOALS 1950 4 17 -1 -1 SO -1 -1 -1 -1 -1 -1 356.TIF TO HALFWAY TO WHITE SHOALS 1952 3 24 -1 -1 IP -1 -1 WI -1 -1 -1 -1 371.TIF WESTWARD 1952 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 373.TIF TO WHITE SHOALS 1953 3 23 -1 -1 BK -1 -1 BV -1 -1 -1 -1 379.TIF TO THE N & W 1957 4 1 12 18 FD -1 -1 DI -1 -1 BK -1 -1 414.TIF TO LANSING SHOALS 1961 3 13 -1 -1 SW -1 -1 -1 -1 -1 -1 442.TIF 1961 3 20 -1 -1 SW -1 -1 -1 -1 -1 -1 443.TIF 1961 4 3 -1 -1 LI -1 -1 -1 -1 -1 -1 445.TIF TO BRIDGE 1962 4 16 -1 -1 HF -1 -1 -1 -1 -1 -1 454.TIF 1963 4 15 -1 -1 SO -1 -1 BV -1 -1 RT -1 -1 463.TIF W TO BEYOND WHITE SHOALS 1964 3 2 -1 -1 OW -1 -1 -1 -1 -1 -1 466.TIF 1964 3 9 -1 -1 SW -1 -1 -1 -1 -1 -1 467.TIF 3Mi WEST 1964 3 9 -1 -1 DI -1 -1 SO -1 -1 BV -1 -1 467.TIF FROM 3Mi WEST TO WHITE SHOALS 1964 3 16 -1 -1 DI -1 -1 SO -1 -1 BV -1 -1 468.TIF W TO WHITE SHOALS 1964 4 13 -1 -1 DI -1 -1 -1 -1 -1 -1 472.TIF 1966 3 7 -1 -1 OW -1 -1 -1 -1 -1 -1 484.TIF TO MCGULPINS POINT ---------------------------------------------------------------------------------------------------------- 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.