GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 225, Approximate Location: 45.84 N. Latitude, 85.11 W. Longitude Site Name White Shoal on Lake Michigan ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1915 4 12 -1 -1 OW -1 -1 -1 -1 -1 -1 111.TIF NORTH OF WHITE SHOALS 1939 4 10 -1 -1 SW -1 -1 -1 -1 -1 -1 273.TIF WESTWARD FROM LIGHT 1940 3 11 -1 -1 OW -1 -1 BV -1 -1 -1 -1 278.TIF 1941 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 290.TIF TO WEST OF 14 FOOT SHOALS 1942 3 23 -1 -1 SO -1 -1 BV -1 -1 -1 -1 294.TIF WESTWARD 1942 3 30 -1 -1 DI -1 -1 -1 -1 -1 -1 295.TIF 1943 4 5 -1 -1 HF -1 -1 WI -1 -1 -1 -1 303.TIF WESTWARD 1943 4 19 -1 -1 SW -1 -1 -1 -1 -1 -1 305.TIF 1943 4 26 -1 -1 IP -1 -1 -1 -1 -1 -1 306.TIF TO GRAYS REEF 1944 3 6 -1 -1 HF -1 -1 -1 -1 -1 -1 308.TIF TO 7Mi EAST OF LANSING SHOALS 1944 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 311.TIF TO BEYOND ISLE AUX GALETS 1944 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 311.TIF TO 6Mi EASTWARD 1944 4 10 -1 -1 HF -1 -1 BK -1 -1 -1 -1 313.TIF (CUT) 1944 4 10 -1 -1 HF -1 -1 -1 -1 -1 -1 313.TIF TO 3Mi EAST 1944 4 17 -1 -1 IP -1 -1 -1 -1 -1 -1 314.TIF 1945 3 26 -1 -1 OW -1 -1 -1 -1 -1 -1 316.TIF 1947 2 19 -1 -1 HF -1 -1 WI -1 -1 -1 -1 324.TIF FROM 7 OR 8Mi WEST AND EASTWAR 1947 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 331.TIF 1947 4 14 -1 -1 IP -1 -1 -1 -1 -1 -1 332.TIF WEST IN NORTH ABOUT PASSAGE 1949 2 28 14 -1 SO -1 -1 WI -1 -1 -1 -1 526.TIF EASTWARD TO OLD MACKINAC POINT 1949 3 7 -1 -1 WI -1 -1 -1 -1 -1 -1 341.TIF TO LANSING SHOAL 1949 3 28 -1 -1 HF -1 -1 RT -1 -1 -1 -1 347.TIF 5Mi WEST OF SHOALS 1950 3 6 -1 -1 WI -1 -1 BV -1 -1 -1 -1 350.TIF WESTWARD 1950 3 13 -1 -1 WI -1 -1 -1 -1 -1 -1 351.TIF 1950 3 27 -1 -1 WI -1 -1 -1 -1 -1 -1 353.TIF 1950 4 17 -1 -1 IJ -1 -1 -1 -1 -1 -1 356.TIF LIGHT 1950 4 24 -1 -1 IP -1 -1 -1 -1 -1 -1 357.TIF TO GRAYS REEF 1951 2 26 20 -1 WI -1 -1 -1 -1 -1 -1 359.TIF 1951 3 12 -1 -1 FD -1 -1 SW -1 -1 -1 -1 361.TIF WEST TO LANSING SHOAL 1951 3 26 -1 -1 SW -1 -1 -1 -1 -1 -1 363.TIF 1951 4 2 -1 -1 RT -1 -1 SW -1 -1 -1 -1 364.TIF 1951 4 2 -1 -1 RT -1 -1 PN -1 -1 -1 -1 364.TIF WHITE SHOAL LIGHT 1951 4 9 -1 -1 IP -1 -1 -1 -1 -1 -1 365.TIF AND WESTWARD 1952 3 31 -1 -1 HF -1 -1 WI -1 -1 -1 -1 372.TIF 1953 3 2 -1 -1 SO -1 -1 BV -1 -1 WI -1 36 528.TIF 0 TO THE NORTH & WEST 1953 3 16 -1 -1 SW -1 -1 -1 -1 -1 -1 378.TIF 1953 3 23 -1 -1 BK -1 -1 BV -1 -1 -1 -1 379.TIF TO THE N & W 1954 3 1 -1 -1 LF -1 -1 SW -1 -1 -1 -1 381.TIF EASTWARD 1954 3 15 1 16 CL -1 -1 BV -1 -1 -1 -1 383.TIF N & W 1954 3 22 -1 -1 OW -1 -1 -1 -1 -1 -1 384.TIF TO THE N & W 1954 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 385.TIF TO THE N & W 1955 3 7 -1 -1 SW -1 -1 -1 -1 -1 -1 391.TIF 1956 3 26 -1 -1 IR -1 -1 DI -1 -1 -1 -1 403.TIF 1956 4 2 -1 -1 DI -1 -1 SW -1 -1 -1 -1 404.TIF 1957 3 25 10 14 FD -1 -1 RT -1 -1 -1 -1 413.TIF TO ST. HELENA 1957 4 1 -1 -1 OW -1 -1 -1 -1 -1 -1 414.TIF SOUTHWARD 1957 4 1 -1 -1 FD -1 -1 DI -1 -1 -1 -1 414.TIF WESTWARD 1958 3 24 -1 -1 FD -1 -1 -1 -1 -1 -1 420.TIF 1959 3 23 -1 -1 FD -1 -1 FS -1 -1 -1 -1 427.TIF TO ISLE AUX GALETS 1959 4 6 18 24 -1 -1 -1 -1 -1 -1 430.TIF TO GRAYS REEF 1959 4 6 -1 -1 DI -1 -1 SW -1 -1 -1 -1 430.TIF TO CHARLEVOIX (40% ICE COVER) 1959 4 6 20 -1 IP -1 -1 BV -1 -1 -1 -1 430.TIF WESTWARD 1959 4 13 -1 -1 IP -1 -1 BV -1 -1 -1 -1 431.TIF WESTWARD 1959 4 20 -1 -1 FD -1 -1 BK -1 -1 -1 -1 432.TIF WESTWARD 1959 4 27 -1 -1 OW -1 -1 -1 -1 -1 -1 433.TIF 1959 4 27 -1 -1 SI -1 -1 -1 -1 -1 -1 433.TIF TO ISLE AUX GALETS 1959 4 27 -1 -1 FD -1 -1 DI -1 -1 -1 -1 433.TIF TO LANSING SHOAL 1960 2 19 8 -1 FD -1 -1 DI -1 -1 SW -1 -1 523.TIF TO LANSING SHOAL 1960 2 29 -1 -1 SO -1 -1 BV -1 -1 -1 -1 522.TIF WESTWARD 1961 3 6 -1 -1 SO -1 -1 -1 -1 -1 -1 441.TIF 1961 3 27 -1 -1 DI -1 -1 BV -1 -1 -1 -1 444.TIF WEST: IN N & S ABOUT PASSAGES 1962 3 12 24 -1 CL -1 -1 -1 -1 -1 -1 449.TIF TO GRAYS REEF 1962 4 9 -1 -1 OW -1 -1 -1 -1 -1 -1 453.TIF TO BEYOND ISLE AUX GALETS 1962 4 16 -1 -1 DI -1 -1 -1 -1 -1 -1 454.TIF TO LANSING SHOAL 1963 3 4 20 25 FD -1 -1 CL -1 -1 WI 24 -1 457.TIF TO LANSING SHOAL 1963 4 15 12 20 RT -1 -1 DI -1 -1 -1 -1 463.TIF TO 2 & 1/2Mi W OF BRIDGE 1964 3 23 -1 -1 DI -1 -1 BV -1 -1 SW -1 -1 469.TIF WESTWARD 1964 3 30 -1 -1 OW -1 -1 BV -1 -1 -1 -1 470.TIF W TOWARD LANSING SHOAL 1964 4 6 -1 -1 DI -1 -1 -1 -1 -1 -1 471.TIF 1965 3 22 -1 -1 SO -1 -1 BV -1 -1 -1 -1 477.TIF WESTWARD 1965 4 26 -1 -1 DI -1 -1 -1 -1 -1 -1 482.TIF WESTWARD 1966 3 21 -1 -1 LF -1 -1 DI -1 -1 BI -1 -1 486.TIF TO LANSING SHOAL (10% ICE COVE ---------------------------------------------------------------------------------------------------------- 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.