GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 014, Approximate Location: 48.33 N. Latitude, 89.22 W. Longitude Site Name Thunder Bay, Ont. on Lake Superior ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1940 3 18 -1 -1 OW -1 -1 -1 -1 -1 -1 279.TIF ANGUS ISLAND: TO ISLE ROYALE 1950 3 20 -1 -1 SO -1 -1 -1 -1 -1 -1 352.TIF 1951 3 12 24 -1 -1 -1 -1 -1 -1 -1 361.TIF TO WELCOME ISLANDS 1951 3 19 -1 -1 SO -1 -1 -1 -1 -1 -1 362.TIF 1951 3 19 -1 -1 HF -1 -1 -1 -1 -1 -1 362.TIF TO 25Mi BEYOND ISLE ROYALE 1951 3 26 -1 -1 SO -1 -1 -1 -1 -1 -1 363.TIF TO THUNDER CAPE 1951 3 26 22 -1 -1 -1 -1 -1 -1 -1 363.TIF 13Mi OUT 1951 4 2 -1 -1 SO -1 -1 -1 -1 -1 -1 364.TIF 1951 4 2 18 22 -1 -1 -1 -1 -1 -1 364.TIF BEYOND 5Mi OUT 1951 4 9 -1 -1 BK -1 -1 -1 -1 -1 -1 365.TIF IN SLIPS & CHANNELS (CUT) 1952 3 24 -1 -1 SO -1 -1 -1 -1 -1 -1 371.TIF 1953 3 2 -1 -1 SO -1 -1 SC -1 -1 -1 -1 528.TIF 1953 3 16 -1 -1 SO -1 -1 -1 -1 -1 -1 378.TIF TO BEYOND WELCOME ISLANDS 1953 3 23 -1 -1 SO -1 -1 -1 -1 -1 -1 379.TIF 1953 3 30 -1 -1 LF -1 -1 -1 -1 -1 -1 380.TIF 1954 3 8 -1 -1 IP -1 -1 -1 -1 -1 -1 382.TIF TO 7Mi OUT 1954 3 15 -1 -1 SO -1 -1 -1 -1 -1 -1 383.TIF WELCOME ISLANDS: NORTHWARD 1954 4 19 -1 -1 BK -1 -1 -1 -1 -1 -1 388.TIF 1955 3 14 -1 -1 SO -1 -1 -1 -1 -1 -1 393.TIF TO THUNDER CAPE 1955 3 28 -1 -1 SO -1 -1 -1 -1 -1 -1 395.TIF 1955 4 11 -1 -1 SO -1 -1 -1 -1 -1 -1 396.TIF 1956 2 27 14 16 SO -1 -1 -1 -1 -1 -1 397.TIF TO WELCOME ISLANDS 1956 3 5 -1 -1 SO -1 -1 -1 -1 -1 -1 399.TIF 1956 4 16 -1 -1 OW -1 -1 -1 -1 -1 -1 406.TIF 1958 4 14 -1 -1 FD -1 -1 DI -1 -1 -1 -1 423.TIF 1959 4 6 -1 -1 SO -1 -1 -1 -1 -1 -1 430.TIF 1959 4 13 -1 -1 OW -1 -1 -1 -1 -1 -1 431.TIF TO WELCOME ISLANDS 1959 4 27 -1 -1 OW -1 -1 -1 -1 -1 -1 433.TIF EXCEPT NORTHERN END BAYS 1960 2 29 -1 -1 SO -1 -1 SC -1 -1 -1 -1 522.TIF 1960 4 11 -1 -1 OW -1 -1 -1 -1 -1 -1 439.TIF 1961 2 27 36 -1 SO -1 -1 -1 -1 -1 -1 440.TIF TO ISLE ROYALE 1961 3 6 -1 -1 SO -1 -1 -1 -1 -1 -1 441.TIF 1961 3 13 -1 -1 FD -1 -1 SO -1 -1 -1 -1 442.TIF TO ISLE ROYALE 1961 3 27 -1 -1 FD -1 -1 FS -1 -1 -1 -1 444.TIF 1961 4 3 -1 -1 SO -1 -1 RT -1 -1 -1 -1 445.TIF 1962 2 26 -1 -1 SO -1 -1 -1 -1 -1 -1 447.TIF 1962 3 5 24 -1 SO -1 -1 SC 24 -1 -1 -1 448.TIF TO ISLE ROYALE 1962 3 12 -1 -1 SO -1 -1 -1 -1 -1 -1 449.TIF 1962 4 2 -1 -1 SO -1 -1 -1 -1 -1 -1 452.TIF LAKEHEAD TO ISLE ROYALE 1962 4 23 -1 -1 HF -1 -1 -1 -1 -1 -1 455.TIF 1963 3 11 -1 -1 PR -1 -1 -1 -1 -1 -1 458.TIF 1963 3 25 24 36 SO -1 -1 -1 -1 -1 -1 460.TIF TO ISLE ROYALE 1963 4 8 -1 -1 SO -1 -1 -1 -1 -1 -1 462.TIF 1963 4 22 -1 -1 BK -1 -1 -1 -1 -1 -1 464.TIF CHANNEL (CUT) 1963 4 22 -1 -1 SO -1 -1 FD -1 -1 -1 -1 464.TIF UPPER BAY 1964 3 2 -1 -1 SO -1 -1 -1 -1 -1 -1 466.TIF ALONG SHORE 1964 3 16 -1 -1 FS -1 -1 -1 -1 -1 -1 468.TIF 1964 3 23 -1 -1 FS -1 -1 -1 -1 -1 -1 469.TIF 1964 4 6 -1 -1 DI -1 -1 -1 -1 -1 -1 471.TIF (90% ICE COVER) 1965 3 15 -1 -1 SO -1 -1 -1 -1 -1 -1 476.TIF 1966 3 7 -1 -1 SW -1 -1 -1 -1 -1 -1 484.TIF ANGUS ISLAND: SW TO MAINLAND 1966 3 14 -1 -1 HF -1 -1 SO -1 -1 -1 -1 485.TIF 1966 3 28 -1 -1 SO -1 -1 -1 -1 -1 -1 487.TIF 1966 4 4 -1 -1 DI -1 -1 -1 -1 -1 -1 488.TIF ANGUS ISLAND 1967 3 27 -1 -1 FS -1 -1 -1 -1 -1 -1 493.TIF TO ISLE ROYALE 1967 4 17 -1 -1 SO -1 -1 -1 -1 -1 -1 496.TIF NW HALF 1967 4 17 -1 -1 PN -1 -1 -1 -1 -1 -1 496.TIF SE HALF 1968 4 8 -1 -1 SW -1 -1 -1 -1 -1 -1 501.TIF BAY ENTRANCE 1969 3 31 -1 -1 IP -1 -1 -1 -1 -1 -1 508.TIF 1969 4 7 -1 -1 SW -1 -1 -1 -1 -1 -1 509.TIF 1970 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 515.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.