GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 263, Approximate Location: 45.29 N. Latitude, 86.96 W. Longitude Site Name Porte des Morts Passage on Lake Michigan ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1940 3 11 -1 -1 OW -1 -1 -1 -1 -1 -1 278.TIF TO 3Mi INTO GREEN BAY 1940 4 8 -1 -1 SW -1 -1 -1 -1 -1 -1 282.TIF TO SEVERAL MILES OUT 1941 3 17 -1 -1 FD -1 -1 DI -1 -1 -1 -1 287.TIF TO DETROIT ISLAND HARBOR 1942 3 16 -1 -1 FD -1 -1 DI -1 -1 -1 -1 293.TIF 1947 3 31 -1 -1 IJ -1 -1 -1 -1 -1 -1 330.TIF 1950 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 356.TIF 1952 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 371.TIF TO DOOR BLUFF 1954 3 8 8 10 RI -1 -1 -1 -1 -1 -1 382.TIF 1954 3 15 -1 -1 DI -1 -1 SW -1 -1 -1 -1 383.TIF 1955 2 28 18 -1 SM -1 -1 -1 -1 -1 -1 389.TIF 1956 3 5 -1 -1 SW -1 -1 -1 -1 -1 -1 399.TIF 1956 3 19 3 -1 NI -1 -1 -1 -1 -1 -1 402.TIF 1956 3 26 -1 -1 OW -1 -1 -1 -1 -1 -1 403.TIF 1960 2 19 -1 -1 OW -1 -1 -1 -1 -1 -1 523.TIF PASSAGE & LEADS: TO 10Mi N & W 1960 3 14 4 6 NI -1 -1 -1 -1 -1 -1 435.TIF 1961 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 443.TIF 1961 4 3 18 -1 FD -1 -1 DI -1 -1 RT -1 -1 445.TIF TO GREEN BAY ENTRANCE LIGHT 1961 4 10 -1 -1 OW -1 -1 -1 -1 -1 -1 446.TIF 1962 3 26 12 -1 FS -1 -1 CL -1 -1 WI -1 -1 451.TIF 1962 4 2 20 24 RT -1 -1 -1 -1 -1 -1 452.TIF 1963 3 11 12 36 FD -1 -1 FS -1 -1 -1 -1 458.TIF 1967 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 492.TIF TO 1Mi N OF PLUM ISLAND ---------------------------------------------------------------------------------------------------------- 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.