GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 129, Approximate Location: 45.83 N. Latitude, 84.60 W. Longitude Site Name Round Island (HUR) on Lake Huron ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1944 4 10 -1 -1 OW -1 -1 -1 -1 -1 -1 313.TIF PASSAGE 1944 4 10 -1 -1 IP -1 -1 -1 -1 -1 -1 313.TIF TO SOUTH GRAHAM SHOAL 1947 3 3 -1 -1 OW -1 -1 -1 -1 -1 -1 326.TIF EASTWARD 1947 3 10 -1 -1 LF -1 -1 -1 -1 -1 -1 327.TIF PASSAGE 1948 3 1 -1 -1 IP -1 -1 -1 -1 -1 -1 334.TIF 1949 2 28 -1 -1 OW -1 -1 -1 -1 -1 -1 526.TIF EASTWARD 1949 3 7 -1 -1 OW -1 -1 -1 -1 -1 -1 341.TIF EASTWARD 1949 3 7 -1 -1 SO -1 -1 BV -1 -1 WI -1 -1 341.TIF PASSAGE: WESTWARD 1950 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 356.TIF PASSAGE 1950 4 24 -1 -1 OW -1 -1 -1 -1 -1 -1 357.TIF PASSAGE 1953 3 2 -1 -1 OW -1 -1 -1 -1 -1 -1 528.TIF PASSAGE: TO THE EAST 1953 3 2 -1 -1 SW -1 -1 -1 -1 -1 -1 528.TIF PASSAGE: TO THE WEST 1955 2 28 -1 -1 IP -1 -1 BV -1 -1 -1 -1 389.TIF WESTWARD 1955 3 7 -1 -1 IP -1 -1 BV -1 -1 -1 -1 391.TIF WEST OF LIGHT STATION 1955 4 11 -1 -1 DC -1 -1 -1 -1 -1 -1 396.TIF PASSAGE 1956 3 5 -1 -1 OW -1 -1 -1 -1 -1 -1 399.TIF PASSAGE 1957 3 25 -1 -1 OW -1 -1 -1 -1 -1 -1 413.TIF PASSAGE 1958 3 3 15 -1 -1 -1 -1 -1 -1 -1 417.TIF PASSAGE 1959 4 6 -1 -1 OW -1 -1 -1 -1 -1 -1 430.TIF ROUND ISLAND LAKE: TO L. CHARL 1960 2 19 -1 -1 IJ -1 -1 -1 -1 -1 -1 523.TIF PASSAGE 1960 2 19 6 -1 FD -1 -1 CL -1 -1 SI -1 -1 523.TIF TO WHITE SHOAL 1960 3 7 -1 -1 IP -1 -1 WI -1 -1 -1 -1 434.TIF PASSAGE LIGHT: TO THE E & W 1960 3 14 -1 -1 SO -1 -1 BV -1 -1 -1 -1 435.TIF E & W OF ISLAND 1960 3 14 -1 -1 WI 156 -1 -1 -1 -1 -1 435.TIF PASSAGE: E OF LIGHT 1960 3 28 -1 -1 SO -1 -1 FD -1 -1 -1 -1 437.TIF TO LANSING SHOAL 1960 4 4 -1 -1 OW -1 -1 -1 -1 -1 -1 438.TIF TO MARTIN REEF 1961 3 6 -1 -1 SW -1 -1 -1 -1 -1 -1 441.TIF PASSAGE LIGHT 1961 3 20 2 18 SO -1 -1 SI -1 -1 WI -1 -1 443.TIF PASSAGE: TO THE E & W 1961 3 27 -1 -1 LI -1 -1 -1 -1 -1 -1 444.TIF PASSAGE 1961 4 3 6 -1 DI -1 -1 SI -1 -1 PN -1 -1 445.TIF PASSAGE 1962 2 26 -1 -1 FS -1 -1 CL -1 -1 BV -1 -1 447.TIF E & SE OF PASSAGE 1962 3 19 6 12 FD -1 -1 FS -1 -1 CL -1 -1 450.TIF TO CHEBOYGAN 1962 3 26 -1 -1 FS -1 -1 CL -1 -1 -1 -1 451.TIF PASSAGE: TO BRIDGE 1962 4 2 6 8 FD -1 -1 FS -1 -1 RT -1 -1 452.TIF TO MACKINAW BRIDGE 1962 4 16 -1 -1 OW -1 -1 -1 -1 -1 -1 454.TIF PASSAGE 1962 4 23 -1 -1 OW -1 -1 -1 -1 -1 -1 455.TIF PASSAGE 1963 3 4 -1 -1 FD -1 -1 FS -1 -1 WI -1 -1 457.TIF TO BRIDGE 1963 3 18 18 32 FD -1 -1 FS -1 -1 -1 -1 459.TIF TO BRIDGE 1963 4 15 -1 -1 SW -1 -1 -1 -1 -1 -1 463.TIF PASSAGE: INTO LAKE HURON 1964 4 13 -1 -1 OW -1 -1 -1 -1 -1 -1 472.TIF PASSAGE 1970 3 3 15 20 FS -1 -1 IR -1 -1 -1 -1 518.TIF TO LANSING SHOAL ---------------------------------------------------------------------------------------------------------- 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.