GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 022, Approximate Location: 47.75 N. Latitude, 87.75 W. Longitude Site Name Lake Superior on Lake Superior ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1921 3 15 -1 -1 OW -1 -1 -1 -1 -1 -1 147.TIF EASTERN PORTION 1922 3 7 18 26 SO -1 -1 -1 -1 -1 -1 149.TIF ALL HARBORS 1923 4 10 -1 -1 NC -1 -1 -1 -1 -1 -1 160.TIF CENTRAL & EASTERN PORTIONS 1924 3 18 -1 -1 FD -1 -1 -1 -1 -1 -1 165.TIF WEST END: TO 100Mi OUT 1926 3 2 -1 -1 HF -1 -1 -1 -1 -1 -1 176.TIF WEST END TO GRAND MARAIS, MN 1929 3 12 -1 -1 HF -1 -1 -1 -1 -1 -1 197.TIF EAST END 1933 3 14 15 22 -1 -1 -1 -1 -1 -1 221.TIF SOUTH SHORE HARBORS 1933 3 14 -1 -1 OW -1 -1 -1 -1 -1 -1 221.TIF MINNESOTA NORTH SHORE HARBORS 1933 3 14 -1 -1 LI -1 -1 -1 -1 -1 -1 221.TIF MINNESOTA NORTH SHORE (LAKE) 1933 3 21 10 25 NC -1 -1 -1 -1 -1 -1 222.TIF HARBORS 1933 3 28 -1 -1 IP -1 -1 SW -1 -1 -1 -1 223.TIF SOUTH SHORE 1933 4 4 6 16 RT -1 -1 -1 -1 -1 -1 224.TIF SOUTH SHORE HARBORS 1933 4 11 -1 -1 DI -1 -1 BV -1 -1 -1 -1 225.TIF MOST SOUTH SHORE PORTS 1933 4 18 -1 -1 SW -1 -1 -1 -1 -1 -1 226.TIF LAKE 1934 3 6 14 27 -1 -1 -1 -1 -1 -1 228.TIF HARBORS 1934 3 6 -1 -1 IP -1 -1 BV -1 -1 -1 -1 228.TIF SOUTH SHORE PORTS 1934 3 13 15 28 IP -1 -1 BV -1 -1 -1 -1 229.TIF HARBORS 1934 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 230.TIF MINNESOTA SHORE 1934 3 20 -1 -1 IP -1 -1 BV -1 -1 -1 -1 230.TIF EXCEPT MINNESOTA SHORE 1934 3 20 16 27 -1 -1 -1 -1 -1 -1 230.TIF HARBORS 1934 3 27 14 30 -1 -1 -1 -1 -1 -1 231.TIF HARBORS 1934 3 27 -1 -1 FD -1 -1 DI -1 -1 -1 -1 231.TIF EXTREME WEST END 1934 3 27 -1 -1 IP -1 -1 BV -1 -1 -1 -1 231.TIF EXCEPT EXTREME WEST END 1934 4 3 -1 -1 IP -1 -1 BV -1 -1 -1 -1 232.TIF ALL PORTS 1934 4 3 -1 -1 SO -1 -1 SW -1 -1 -1 -1 232.TIF LAKE 1934 4 10 10 36 -1 -1 -1 -1 -1 -1 233.TIF HARBORS 1934 4 10 -1 -1 FD -1 -1 SW -1 -1 -1 -1 233.TIF LAKE 1934 4 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 234.TIF ALL SOUTH SHORE PORTS 1934 4 17 10 30 -1 -1 -1 -1 -1 -1 234.TIF MOST HARBORS 1934 4 24 -1 -1 LI -1 -1 -1 -1 -1 -1 235.TIF WESTERN END OF LAKE 1934 4 24 -1 -1 IP -1 -1 BV -1 -1 -1 -1 235.TIF ALL OF MICHIGAN SHORE 1934 5 1 -1 -1 OW -1 -1 -1 -1 -1 -1 236.TIF SOUTH SHORE 1935 3 5 -1 -1 FD -1 -1 DI -1 -1 -1 -1 237.TIF 1935 3 12 14 28 -1 -1 -1 -1 -1 -1 238.TIF HARBORS 1935 3 12 -1 -1 FD -1 -1 DI -1 -1 -1 -1 238.TIF LAKE 1935 3 19 12 28 -1 -1 -1 -1 -1 -1 239.TIF MOST HARBORS 1935 4 2 -1 -1 OW -1 -1 -1 -1 -1 -1 241.TIF WEST END OF LAKE 1936 3 10 16 34 -1 -1 -1 -1 -1 -1 244.TIF HARBORS 1936 3 17 12 34 -1 -1 -1 -1 -1 -1 245.TIF HARBORS 1936 3 17 -1 -1 IP -1 -1 SO -1 -1 BV -1 -1 245.TIF LAKE: ENTIRE SOUTH SHORE 1936 3 23 -1 -1 IP -1 -1 BV -1 -1 -1 -1 246.TIF SOUTH SHORE 1936 3 23 10 35 -1 -1 -1 -1 -1 -1 246.TIF HARBORS 1936 3 30 -1 -1 FD -1 -1 DI -1 -1 BV -1 -1 247.TIF NEARLY ALL PORTS 1936 3 30 14 30 -1 -1 -1 -1 -1 -1 247.TIF MOST HARBORS 1936 4 6 -1 -1 PI -1 -1 -1 -1 -1 -1 248.TIF ENTIRE SOUTH SHORE 1936 4 6 10 33 -1 -1 -1 -1 -1 -1 248.TIF HARBORS 1936 4 13 -1 -1 PI -1 -1 BV -1 -1 -1 -1 249.TIF ENTIRE SOUTH SHORE 1936 4 13 12 29 -1 -1 -1 -1 -1 -1 249.TIF HARBORS: SOUTH SHORE 1936 4 20 -1 -1 IP -1 -1 BV -1 -1 -1 -1 250.TIF SOUTH SHORE 1936 4 20 12 25 -1 -1 -1 -1 -1 -1 250.TIF MOST HARBORS 1936 4 27 0 22 -1 -1 -1 -1 -1 -1 251.TIF HARBORS 1936 5 4 -1 -1 OW -1 -1 -1 -1 -1 -1 252.TIF MANY LOCATIONS 1936 5 4 -1 -1 IP -1 -1 BV -1 -1 -1 -1 252.TIF SOME LOCATIONS 1937 3 8 6 28 -1 -1 -1 -1 -1 -1 254.TIF HARBORS 1937 3 15 -1 -1 IP -1 -1 BV -1 -1 -1 -1 255.TIF ALL SOUTH SHORE PORTS 1937 3 15 10 25 -1 -1 -1 -1 -1 -1 255.TIF HARBORS 1937 3 15 -1 -1 WI -1 -1 -1 -1 -1 -1 255.TIF MOST OF LAKE 1937 3 22 -1 -1 IP -1 -1 BV -1 -1 WI -1 -1 256.TIF SOUTH SHORE PORTS 1937 3 22 6 24 -1 -1 -1 -1 -1 -1 256.TIF SOUTH SHORE HARBORS 1937 3 29 -1 -1 IP -1 -1 BV -1 -1 -1 -1 257.TIF SOUTH SHORE 1937 3 29 10 25 -1 -1 -1 -1 -1 -1 257.TIF HARBORS: SOUTH SHORE 1937 4 5 -1 -1 IP -1 -1 BV -1 -1 -1 -1 258.TIF ENTIRE SOUTH SHORE 1937 4 12 -1 -1 IP -1 -1 BV -1 -1 WI -1 -1 259.TIF ALL SOUTH SHORE PORTS 1937 4 12 8 18 -1 -1 -1 -1 -1 -1 259.TIF HARBORS: SOUTH SHORE 1937 4 19 -1 -1 IP -1 -1 BV -1 -1 SW -1 -1 260.TIF MANY PORTS 1938 3 7 -1 -1 IP -1 -1 BV -1 -1 -1 -1 261.TIF MOST LOCATIONS 1938 3 14 -1 -1 IP -1 -1 BV -1 -1 -1 -1 262.TIF AMERICAN PORTS 1938 3 14 14 32 -1 -1 -1 -1 -1 -1 262.TIF MOST HARBORS 1938 3 21 -1 -1 IP -1 -1 BV -1 -1 RT -1 -1 263.TIF MOST PORTS 1938 4 4 -1 -1 LI -1 -1 -1 -1 -1 -1 265.TIF MOST AMERICAN PORTS & HARBORS 1938 4 11 -1 -1 DI -1 -1 -1 -1 -1 -1 266.TIF WEST END 1938 4 18 -1 -1 OW -1 -1 -1 -1 -1 -1 267.TIF MOST STATIONS 1939 3 6 18 23 -1 -1 -1 -1 -1 -1 268.TIF MOST HARBORS 1939 3 13 -1 -1 IP -1 -1 BV -1 -1 -1 -1 269.TIF MOST PORTS 1939 3 13 8 30 -1 -1 -1 -1 -1 -1 269.TIF HARBORS 1939 3 20 -1 -1 SO -1 -1 BV -1 -1 -1 -1 270.TIF ALL PORTS 1939 3 20 8 36 -1 -1 -1 -1 -1 -1 270.TIF BAYS, CHANNELS, AND HARBORS 1939 3 27 -1 -1 IP -1 -1 BV -1 -1 -1 -1 271.TIF MOST PORTS 1939 3 27 8 44 -1 -1 -1 -1 -1 -1 271.TIF BAYS, CHANNELS, AND HARBORS 1939 4 3 -1 -1 FD -1 -1 DI -1 -1 -1 -1 272.TIF MOST AMERICAN PORTS 1939 4 3 -1 -1 FD -1 -1 BV -1 -1 -1 -1 272.TIF CANADIAN PORTS 1939 4 3 8 29 -1 -1 -1 -1 -1 -1 272.TIF BAYS, CHANNELS, & HARBORS 1939 4 10 -1 -1 IP -1 -1 BV -1 -1 -1 -1 273.TIF MOST REPORTING STATIONS 1939 4 10 10 30 -1 -1 -1 -1 -1 -1 273.TIF MOST BAYS, CHANNELS & HARBORS 1939 4 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 274.TIF MOST PORTS 1939 4 17 8 40 -1 -1 -1 -1 -1 -1 274.TIF BAYS, CHANNELS, AND HARBORS 1939 4 24 -1 -1 SO -1 -1 -1 -1 -1 -1 275.TIF MOST HARBORS 1939 5 1 -1 -1 OW -1 -1 -1 -1 -1 -1 276.TIF MOST HARBORS 1940 3 4 -1 -1 IP -1 -1 BV -1 -1 -1 -1 277.TIF MOST PORTS 1940 3 4 6 26 -1 -1 -1 -1 -1 -1 277.TIF MOST HARBORS, BAYS & CHANNELS 1940 3 11 6 22 -1 -1 -1 -1 -1 -1 278.TIF MOST AMERICAN HARBORS 1940 3 18 13 -1 -1 -1 -1 -1 -1 -1 279.TIF EXTREME WEST END OF LAKE 1940 3 24 -1 -1 IP -1 -1 BV -1 -1 -1 -1 280.TIF MOST PORTS 1940 3 24 4 33 -1 -1 -1 -1 -1 -1 280.TIF MOST BAYS, CHANNELS & HARBORS 1940 4 1 4 33 RT -1 -1 CL -1 -1 -1 -1 281.TIF MOST BAYS, CHANNELS & HARBORS 1940 4 8 7 20 RT -1 -1 CL -1 -1 -1 -1 282.TIF MOST BAYS, CHANNELS & HARBORS 1940 4 15 -1 -1 LF -1 -1 LI -1 -1 -1 -1 283.TIF MOST AMERICAN PORTS 1940 4 15 8 18 SW -1 -1 -1 -1 -1 -1 283.TIF MOST BAYS, CHANNELS & HARBORS 1940 4 22 0 10 -1 -1 -1 -1 -1 -1 284.TIF MOST HARBORS 1941 3 24 13 24 -1 -1 -1 -1 -1 -1 288.TIF HARBORS: WEST END OF LAKE 1941 3 24 3 15 -1 -1 -1 -1 -1 -1 288.TIF LAKE: WEST END 1941 3 31 9 20 -1 -1 -1 -1 -1 -1 289.TIF MOST HARBORS 1941 3 31 -1 -1 HF -1 -1 -1 -1 -1 -1 289.TIF WEST END HARBORS 1941 4 7 -1 -1 FD -1 -1 -1 -1 -1 -1 290.TIF LAKE 1942 4 6 -1 -1 OW -1 -1 -1 -1 -1 -1 296.TIF WESTERN END OF LAKE 1943 3 1 12 22 -1 -1 -1 -1 -1 -1 298.TIF BAYS, HARBORS, AND CHANNELS 1943 3 8 -1 -1 IP -1 -1 BV -1 -1 -1 -1 299.TIF NEARLY ALL REPORTING STATIONS 1943 3 8 20 30 -1 -1 -1 -1 -1 -1 299.TIF LAKE 1943 3 8 14 25 -1 -1 -1 -1 -1 -1 299.TIF BAYS, HARBORS, AND WATERWAYS 1943 3 15 -1 -1 IP -1 -1 BV -1 -1 -1 -1 300.TIF NEARLY ALL PORTS 1943 3 15 18 27 -1 -1 -1 -1 -1 -1 300.TIF BAYS, HARBORS, AND WATERWAYS 1943 3 15 -1 -1 SO -1 -1 -1 -1 -1 -1 300.TIF NEARLY ALL OF WESTERN HALF 1943 3 22 -1 -1 IP -1 -1 BV -1 -1 -1 -1 301.TIF ALL PORTS 1943 3 22 18 30 SO -1 -1 -1 -1 -1 -1 301.TIF HARBORS, BAYS & WATERWAYS 1943 3 29 -1 -1 IP -1 -1 BV -1 -1 -1 -1 302.TIF MOST PORTS 1943 3 29 15 30 SO -1 -1 -1 -1 -1 -1 302.TIF BAYS, HARBORS, & WATERWAYS 1943 4 5 12 25 SO -1 -1 SW -1 -1 -1 -1 303.TIF BAYS, HARBORS, & WATERWAYS 1943 4 19 -1 -1 LI -1 -1 -1 -1 -1 -1 305.TIF WEST END 1943 5 3 -1 -1 OW -1 -1 -1 -1 -1 -1 307.TIF WEST & CENTRAL PORTIONS 1943 5 3 -1 -1 IP -1 -1 -1 -1 -1 -1 307.TIF EAST END 1944 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 309.TIF MINNESOTA SHORE 1944 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 310.TIF MINNESOTA SHORE 1944 4 3 -1 -1 FD -1 -1 DI -1 -1 -1 -1 312.TIF EAST END OF LAKE 1944 4 3 -1 -1 OW -1 -1 -1 -1 -1 -1 312.TIF OFF MINNESOTA SHORE 1944 4 17 -1 -1 FD -1 -1 -1 -1 -1 -1 314.TIF EASTERN PORTION 1945 3 19 -1 -1 OW -1 -1 -1 -1 -1 -1 315.TIF MINNESOTA SHORE--EXCEPT DULUTH 1945 4 2 -1 -1 LI -1 -1 DI -1 -1 -1 -1 317.TIF LAKE 1946 3 11 -1 -1 HF -1 -1 -1 -1 -1 -1 319.TIF ALONG SHORE 1947 3 3 -1 -1 IP -1 -1 BV -1 -1 -1 -1 326.TIF ALL POINTS 1947 3 10 -1 -1 IP -1 -1 BV -1 -1 -1 -1 327.TIF NEARLY ALL POINTS 1947 3 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 328.TIF NEARLY ALL STATIONS 1947 3 24 -1 -1 BK -1 -1 -1 -1 -1 -1 329.TIF NW SIDE 1947 3 31 -1 -1 SW -1 -1 -1 -1 -1 -1 330.TIF NW SHORE 1947 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 331.TIF LIGHTHOUSE POINT TO LSI DOCK 1947 4 21 -1 -1 OW -1 -1 -1 -1 -1 -1 333.TIF WEST END 1947 4 21 -1 -1 OW -1 -1 -1 -1 -1 -1 333.TIF ALL HARBORS 1948 3 8 -1 -1 FD -1 -1 BV -1 -1 -1 -1 335.TIF SOUTHERN SHORE 1948 3 15 -1 -1 SO -1 -1 -1 -1 -1 -1 336.TIF WEST SHORE 1948 3 15 -1 -1 FD -1 -1 BV -1 -1 -1 -1 336.TIF SOUTH SHORE 1948 3 22 -1 -1 IP -1 -1 DC -1 -1 -1 -1 337.TIF SOUTHERN HARBORS 1948 4 5 -1 -1 LI -1 -1 LF -1 -1 -1 -1 339.TIF LAKE 1948 4 12 -1 -1 OW -1 -1 -1 -1 -1 -1 340.TIF NEARLY ALL HARBORS 1949 3 7 -1 -1 LI -1 -1 DI -1 -1 -1 -1 341.TIF SOUTHERN SHORE 1949 3 7 -1 -1 LI -1 -1 -1 -1 -1 -1 341.TIF NORTHWEST SHORE 1949 3 28 -1 -1 FD -1 -1 BK -1 -1 SW -1 -1 347.TIF WEST END 1950 3 20 -1 -1 FD -1 -1 DI -1 -1 -1 -1 352.TIF (80% ICE COVER) 1950 3 27 -1 -1 IP -1 -1 -1 -1 -1 -1 353.TIF (80 TO 90% ICE COVER) 1950 4 17 -1 -1 FD -1 -1 DI -1 -1 -1 -1 356.TIF 1950 4 17 18 24 SO -1 -1 -1 -1 -1 -1 357.TIF NEARLY ALL HARBORS 1950 4 24 -1 -1 FD -1 -1 DI -1 -1 -1 -1 357.TIF MAJORITY OF THE LAKE 1950 5 1 -1 -1 LI -1 -1 -1 -1 -1 -1 358.TIF MOST HARBORS 1951 3 12 -1 -1 FD -1 -1 DI -1 -1 -1 -1 361.TIF SOUTH SHORE 1951 4 2 -1 -1 HF -1 -1 -1 -1 -1 -1 364.TIF 1951 4 2 -1 -1 SO -1 -1 -1 -1 -1 -1 364.TIF NORTH SHORE LINE 1951 4 9 -1 -1 SI 1 20 -1 -1 -1 -1 365.TIF SW END 1952 2 25 -1 -1 OW -1 -1 -1 -1 -1 -1 367.TIF LAKE: (90% ICE COVER) 1952 3 3 -1 -1 SW -1 -1 -1 -1 -1 -1 368.TIF FROM 1 TO 5Mi OUT 1952 4 7 -1 -1 LF -1 -1 -1 -1 -1 -1 373.TIF 1953 2 24 -1 -1 LI -1 -1 -1 -1 -1 -1 375.TIF OPEN LAKE 1955 3 28 -1 -1 FD -1 -1 BK -1 -1 SW -1 -1 395.TIF LAKE 1955 4 11 -1 -1 DI -1 -1 RT -1 -1 SW -1 -1 396.TIF SOUTH HALF OF LAKE 1955 4 11 -1 -1 LI -1 -1 -1 -1 -1 -1 396.TIF NORTH HALF OF LAKE 1956 4 9 -1 -1 OW -1 -1 -1 -1 -1 -1 405.TIF (90% ICE COVER) 1957 2 25 -1 -1 SO -1 -1 -1 -1 -1 -1 407.TIF TO 20Mi OUT FROM N & E SHORES 1957 2 25 -1 -1 IP -1 -1 BK -1 -1 -1 -1 407.TIF ALONG THE SOUTH SHORE 1957 2 25 -1 -1 OW -1 -1 -1 -1 -1 -1 407.TIF MIDDLE OF LAKE 1957 4 15 -1 -1 OW -1 -1 -1 -1 -1 -1 415.TIF MAIN BODY 1958 3 31 -1 -1 FD -1 -1 -1 -1 -1 -1 421.TIF SPLIT ROCK TO N TIP OUTER ISL. 1958 3 31 -1 -1 FD -1 -1 -1 -1 -1 -1 421.TIF S TIP OUTER ISL. TO ONTONAGON 1958 3 31 -1 -1 FD -1 -1 FS -1 -1 -1 -1 421.TIF TRAVERSE ISLAND TO PT. ABBAYE 1958 3 31 -1 -1 FD -1 -1 FS -1 -1 -1 -1 421.TIF TRAVERSE ISLAND TO HURON RIVER 1959 3 2 -1 -1 HF -1 -1 -1 -1 -1 -1 424.TIF (95% ICE COVER) 1959 3 9 -1 -1 SW -1 -1 -1 -1 -1 -1 425.TIF S OF ST. JOSEPHS ISLAND 1959 3 9 -1 -1 SW -1 -1 -1 -1 -1 -1 425.TIF OFF POINT AUX PINS 1959 4 6 -1 -1 FD -1 -1 BK -1 -1 SW -1 -1 430.TIF (80% ICE COVER) 1961 2 27 -1 -1 DI -1 -1 -1 -1 -1 -1 440.TIF PASSAGE ISLAND TO OISEAU BAY 1961 3 20 -1 -1 RT -1 -1 -1 -1 -1 -1 443.TIF E & S SIDE: TO 5 TO 20Mi OUT 1962 3 12 -1 -1 IP -1 -1 -1 -1 -1 -1 449.TIF (90% ICE COVER) 1962 3 12 -1 -1 SW -1 -1 -1 -1 -1 -1 449.TIF N OF COPPERMINE POINT 1962 4 9 -1 -1 LF -1 -1 -1 -1 -1 -1 453.TIF (20% ICE COVER) 1962 4 23 -1 -1 OW -1 -1 -1 -1 -1 -1 455.TIF MISSION RIVER 1963 2 25 -1 -1 HF -1 -1 WI -1 -1 -1 -1 456.TIF (90% ICE COVER) 1963 3 18 -1 -1 IP -1 -1 -1 -1 -1 -1 459.TIF (95% ICE COVER) 1963 3 25 -1 -1 -1 -1 -1 -1 -1 -1 460.TIF (90% ICE COVER) 1963 4 1 -1 -1 -1 -1 -1 -1 -1 -1 461.TIF (70% ICE COVER) 1963 4 22 -1 -1 SO -1 -1 RT -1 -1 -1 -1 464.TIF MCKELLAR RIVER 1963 4 22 -1 -1 OW -1 -1 -1 -1 -1 -1 464.TIF MISSION RIVER 1964 2 24 -1 -1 -1 -1 -1 -1 -1 -1 465.TIF (40% ICE COVER) 1964 3 2 10 18 DI -1 -1 PN -1 -1 SW -1 -1 466.TIF 1964 3 30 -1 -1 DI -1 -1 PN -1 -1 -1 -1 470.TIF 1964 4 6 -1 -1 LI -1 -1 -1 -1 -1 -1 471.TIF CENTER OF LAKE 1965 2 23 20 37 -1 -1 -1 -1 -1 -1 473.TIF HARBORS 1965 2 23 -1 -1 LF -1 -1 PN -1 -1 -1 -1 473.TIF BEYOND 1Mi OUT FROM SHORE 1966 2 28 -1 -1 PI -1 -1 -1 -1 -1 -1 483.TIF (60 TO 90% ICE COVER) 1967 2 27 -1 -1 FD -1 -1 -1 -1 -1 -1 489.TIF (60 TO 70% ICE COVER) 1967 2 27 16 32 -1 -1 -1 -1 -1 -1 489.TIF HARBORS 1967 2 27 -1 -1 FS -1 -1 -1 -1 -1 -1 489.TIF NORTHERN BAYS 1967 2 27 -1 -1 FS -1 -1 -1 -1 -1 -1 489.TIF W HALF SHORES 1967 3 6 -1 -1 FS -1 -1 SC -1 -1 -1 -1 490.TIF NORTHERN BAYS 1967 3 13 -1 -1 FS -1 -1 -1 -1 -1 -1 491.TIF S SHORE 1967 3 13 6 10 FD -1 -1 IJ -1 -1 -1 -1 491.TIF NW PORTION 1967 3 20 -1 -1 IP -1 -1 -1 -1 -1 -1 492.TIF (80% ICE COVER) 1967 3 20 -1 -1 WT -1 -1 -1 -1 -1 -1 492.TIF MANY NORTH PORTIONS 1967 3 20 -1 -1 FS -1 -1 -1 -1 -1 -1 492.TIF MOST BAYS 1967 3 20 -1 -1 FS -1 -1 -1 -1 -1 -1 492.TIF MOST OF S SHORE 1967 3 27 -1 -1 FS -1 -1 -1 -1 -1 -1 493.TIF (90% ICE COVER) 1967 4 3 -1 -1 SO -1 -1 FS -1 -1 -1 -1 494.TIF NORTHERN BAYS 1967 4 3 -1 -1 FS -1 -1 RT -1 -1 -1 -1 494.TIF S SHORE 1967 4 10 -1 -1 OW -1 -1 -1 -1 -1 -1 495.TIF N SHORE: W OF ISLE ROYALE 1967 4 10 1 35 RT -1 -1 -1 -1 -1 -1 495.TIF NORTHERN BAYS 1968 2 26 -1 -1 WI -1 -1 -1 -1 -1 -1 521.TIF SE SHORE 1968 2 26 -1 -1 SO -1 -1 -1 -1 -1 -1 521.TIF BAYS 1968 3 4 -1 -1 WI -1 -1 IN -1 -1 -1 -1 520.TIF SW FROM MONTREAL ISLAND 1968 3 11 -1 -1 DI -1 -1 -1 -1 -1 -1 497.TIF (75% ICE COVER) 1968 3 18 22 36 FS -1 -1 WI -1 -1 -1 -1 498.TIF BAYS 1968 3 18 -1 -1 WT -1 -1 SL -1 -1 -1 -1 498.TIF ALONG SHORES 1968 3 25 -1 -1 NI -1 -1 BK -1 -1 -1 -1 499.TIF E PORTIONS (75% ICE COVER) 1968 3 25 -1 -1 NI -1 -1 BK -1 -1 -1 -1 499.TIF W PORTIONS (90% ICE COVER) 1968 3 25 -1 -1 SO -1 -1 FS -1 -1 RT -1 -1 499.TIF BAYS 1968 4 1 -1 -1 WI -1 -1 -1 -1 -1 -1 500.TIF SE PORTION 1968 4 8 -1 -1 FS -1 -1 -1 -1 -1 -1 501.TIF N BAYS 1968 4 8 -1 -1 OW -1 -1 -1 -1 -1 -1 501.TIF CENTER OF LAKE 1968 4 8 -1 -1 DI -1 -1 -1 -1 -1 -1 501.TIF S & SE SHORES 1968 4 15 -1 -1 RT -1 -1 DI -1 -1 -1 -1 502.TIF N BAYS 1969 2 24 -1 -1 LI -1 -1 -1 -1 -1 -1 503.TIF W HALF 1969 2 24 -1 -1 FS -1 -1 -1 -1 -1 -1 503.TIF E HALF 1969 3 3 -1 -1 OW -1 -1 -1 -1 -1 -1 504.TIF E & W BASINS 1969 3 10 -1 -1 FS -1 -1 IJ -1 -1 -1 -1 505.TIF S & W SHORE: BAYS & PORTS 1969 3 17 -1 -1 FS -1 -1 IJ -1 -1 -1 -1 506.TIF S & W SHORES: BAYS & PORTS 1969 3 24 -1 -1 WI -1 -1 -1 -1 -1 -1 507.TIF S & W SHORELINES 1969 3 24 -1 -1 FS -1 -1 -1 -1 -1 -1 507.TIF MOST PORTS & BAYS 1969 3 31 -1 -1 RT -1 -1 -1 -1 -1 -1 508.TIF S BAYS & SHORELINE 1969 4 7 -1 -1 RT -1 -1 -1 -1 -1 -1 509.TIF S SHORES & BAYS 1969 4 14 -1 -1 RT -1 -1 -1 -1 -1 -1 510.TIF SOME BAYS 1970 2 24 -1 -1 IP -1 -1 -1 -1 -1 -1 519.TIF W HALF (50% ICE COVER) 1970 2 24 -1 -1 LI -1 -1 -1 -1 -1 -1 519.TIF E HALF 1970 2 24 -1 -1 WI -1 -1 -1 -1 -1 -1 519.TIF S SHORE 1970 3 10 -1 -1 WI -1 -1 -1 -1 -1 -1 511.TIF S SHORE 1970 3 17 -1 -1 SO -1 -1 -1 -1 -1 -1 512.TIF W & S SHORES 1970 3 17 -1 -1 SO -1 -1 WI -1 -1 -1 -1 512.TIF S SHORES 1970 3 24 -1 -1 IP -1 -1 -1 -1 -1 -1 513.TIF S HALF 1970 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 515.TIF S SHORE 1970 4 14 -1 -1 IP -1 -1 -1 -1 -1 -1 516.TIF S HALF ---------------------------------------------------------------------------------------------------------- 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.