GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 127, Approximate Location: 45.85 N. Latitude, 84.62 W. Longitude Site Name Mackinac Island on Lake Huron ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1900 2 27 -1 -1 OW -1 -1 -1 -1 -1 -1 003.TIF E OF ISLAND 1900 2 27 14 20 -1 -1 -1 -1 -1 -1 003.TIF BETWEEN ISLAND & MACKINAW CITY 1900 3 6 -1 -1 IP -1 -1 -1 -1 -1 -1 004.TIF TO 7Mi E OF ISLANDS 1900 3 12 -1 -1 IP -1 -1 -1 -1 -1 -1 005.TIF TO 3Mi EAST 1900 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 006.TIF EAST END OF ISLAND 1900 3 27 -1 -1 OW -1 -1 BV -1 -1 -1 -1 007.TIF LAKE HURON 1900 4 3 -1 -1 RT -1 -1 -1 -1 -1 -1 008.TIF 1900 4 3 -1 -1 FD -1 -1 DI -1 -1 BK -1 -1 008.TIF EASTWARD 1900 4 10 -1 -1 OW -1 -1 -1 -1 -1 -1 009.TIF TO ST. IGNACE 1901 3 5 18 -1 -1 -1 -1 -1 -1 -1 011.TIF EAST TO SPECTACLE REEF LIGHT 1901 3 11 20 -1 SL -1 -1 SC -1 -1 -1 -1 013.TIF 1901 4 9 -1 -1 RT -1 -1 -1 -1 -1 -1 016.TIF 1901 4 9 -1 -1 OW -1 -1 -1 -1 -1 -1 016.TIF TO MCGULPINS POINT 1902 3 4 -1 -1 BK -1 -1 -1 -1 -1 -1 019.TIF SOUTH CHANNEL 1902 3 4 -1 -1 OW -1 -1 -1 -1 -1 -1 019.TIF TO THE EAST 1902 3 11 -1 -1 NC -1 -1 -1 -1 -1 -1 020.TIF 1902 3 11 -1 -1 OW -1 -1 -1 -1 -1 -1 020.TIF EAST OF ISLAND 1902 3 18 -1 -1 DI -1 -1 -1 -1 -1 -1 021.TIF 1903 3 3 12 -1 -1 -1 -1 -1 -1 -1 024.TIF 1903 3 10 -1 -1 IP -1 -1 -1 -1 -1 -1 025.TIF TO MACKINAW CITY 1903 3 24 -1 -1 RT -1 -1 SW -1 -1 -1 -1 027.TIF 1904 3 22 30 -1 NC -1 -1 SC 12 -1 -1 -1 032.TIF 1904 3 29 -1 -1 NC -1 -1 -1 -1 -1 -1 033.TIF 1904 4 5 -1 -1 IP -1 -1 RT -1 -1 -1 -1 034.TIF TO ST. IGNACE 1904 4 12 -1 -1 RT -1 -1 CL -1 -1 NS -1 -1 035.TIF 1906 4 3 -1 -1 IP -1 -1 BV -1 -1 RT -1 -1 049.TIF 1907 4 2 -1 -1 OW -1 -1 -1 -1 -1 -1 055.TIF NORTH CHANNEL 1907 4 2 -1 -1 SO -1 -1 -1 -1 -1 -1 055.TIF SOUTH CHANNEL 1907 4 2 -1 -1 FD -1 -1 BK -1 -1 -1 -1 055.TIF GRAHAM SHOALS TO ST. HELENA 1907 4 2 -1 -1 FD -1 -1 BK -1 -1 -1 -1 055.TIF ST. HELENA TO WAUGOSHANCE 1908 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 524.TIF 5Mi EAST OF ISLAND 1908 4 7 -1 -1 SO -1 -1 NC -1 -1 -1 -1 061.TIF 1908 4 14 -1 -1 OW -1 -1 -1 -1 -1 -1 062.TIF NORTH PASSAGE 1908 4 14 -1 -1 IP -1 -1 -1 -1 -1 -1 062.TIF SOUTH AND WEST 1908 4 21 -1 -1 OW -1 -1 -1 -1 -1 -1 063.TIF NORTH CHANNEL 1908 4 21 -1 -1 DI -1 -1 -1 -1 -1 -1 063.TIF 1909 3 30 -1 -1 OW -1 -1 -1 -1 -1 -1 068.TIF TO THE DOCKS ON THE EAST SIDE 1909 3 30 -1 -1 SO -1 -1 -1 -1 -1 -1 068.TIF TO THE SOUTH AND WEST 1909 4 6 -1 -1 IP -1 -1 -1 -1 -1 -1 069.TIF SOUTH & WEST OF ISLAND 1910 3 1 -1 -1 SO -1 -1 -1 -1 -1 -1 071.TIF SOUTH & WEST OF ISLAND 1910 3 1 -1 -1 OW -1 -1 -1 -1 -1 -1 071.TIF ABOUT 2Mi TO THE EAST 1910 3 8 16 -1 NC -1 -1 -1 -1 -1 -1 072.TIF 1910 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 075.TIF STRAITS 1911 3 7 -1 -1 SO -1 -1 -1 -1 -1 -1 077.TIF EAST AND WEST OF ISLAND 1911 3 14 -1 -1 OW -1 -1 -1 -1 -1 -1 078.TIF EAST OF BOIS BLANC LIGHT 1911 3 21 -1 -1 OW -1 -1 -1 -1 -1 -1 079.TIF TO WITHIN 3Mi OF MISSION POINT 1911 3 28 -1 -1 OW -1 -1 -1 -1 -1 -1 080.TIF NORTH PASSAGE TO GRAHAM SHOAL 1911 4 4 -1 -1 FD -1 -1 -1 -1 -1 -1 081.TIF NORTH PASSAGE 1911 4 4 -1 -1 IP -1 -1 -1 -1 -1 -1 081.TIF SOUTH PASSAGE 1912 3 12 -1 -1 IP -1 -1 -1 -1 -1 -1 083.TIF 1912 3 26 -1 -1 SO -1 -1 NC -1 -1 -1 -1 085.TIF 1912 4 9 -1 -1 OW -1 -1 -1 -1 -1 -1 087.TIF CHANNEL 1912 4 16 -1 -1 DI -1 -1 -1 -1 -1 -1 088.TIF STRAITS 1912 4 23 -1 -1 OW -1 -1 -1 -1 -1 -1 089.TIF 1912 4 23 -1 -1 OW -1 -1 -1 -1 -1 -1 089.TIF STRAITS 1913 3 18 20 -1 NC -1 -1 -1 -1 -1 -1 092.TIF 1913 3 25 -1 -1 SO -1 -1 NC -1 -1 -1 -1 093.TIF 1913 4 1 -1 -1 RT -1 -1 -1 -1 -1 -1 094.TIF 1913 4 8 -1 -1 OW -1 -1 -1 -1 -1 -1 095.TIF NORTH OF ISLAND 1913 4 8 -1 -1 IP -1 -1 -1 -1 -1 -1 095.TIF TO THE WEST OF GRAHAMS SHOALS 1913 4 16 -1 -1 DI -1 -1 -1 -1 -1 -1 096.TIF EASTERN PORTION OF STRAITS 1913 4 22 -1 -1 BK -1 -1 -1 -1 -1 -1 097.TIF MCGULPINS POINT WESTWARD 1914 3 3 -1 -1 IP -1 -1 -1 -1 -1 -1 098.TIF BETWEEN ISLAND AND MAINLAND 1914 3 24 18 -1 SO -1 -1 -1 -1 -1 -1 101.TIF 1914 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 102.TIF TO MISSION POINT ON NORTH SIDE 1914 4 7 -1 -1 NC -1 -1 -1 -1 -1 -1 103.TIF 1914 4 14 -1 -1 OW -1 -1 -1 -1 -1 -1 104.TIF N & E OF ISLAND TO THE DOCKS 1914 4 14 -1 -1 IP -1 -1 -1 -1 -1 -1 104.TIF BETWEEN ISLAND & GRAHAMS POINT 1914 4 20 -1 -1 OW -1 -1 -1 -1 -1 -1 105.TIF STRAITS 1915 3 9 -1 -1 OW -1 -1 -1 -1 -1 -1 106.TIF TO ROUND ISLAND 1915 3 9 -1 -1 IP -1 -1 -1 -1 -1 -1 106.TIF TO THE EAST 1915 3 9 12 -1 -1 -1 -1 -1 -1 -1 106.TIF STRAITS 1915 3 16 -1 -1 OW -1 -1 -1 -1 -1 -1 107.TIF EASTWARD TO SPECTACLE REEF 1915 3 30 -1 -1 SO -1 -1 -1 -1 -1 -1 109.TIF 1915 4 6 -1 -1 RT -1 -1 -1 -1 -1 -1 110.TIF 1915 4 13 -1 -1 OW -1 -1 -1 -1 -1 -1 111.TIF STRAITS 1915 4 13 -1 -1 DI -1 -1 -1 -1 -1 -1 111.TIF ABOVE GRAHAMS POINT 1916 3 7 4 -1 -1 -1 -1 -1 -1 -1 113.TIF BW TO BOISE BLANC ISLAND LIGHT 1916 3 7 -1 -1 SO -1 -1 -1 -1 -1 -1 113.TIF TO THE WEST & SOUTH 1916 4 11 -1 -1 OW -1 -1 -1 -1 -1 -1 118.TIF TO ROUND ISLAND 1916 4 11 -1 -1 OW -1 -1 -1 -1 -1 -1 118.TIF EAST OF BOIS BLANC LIGHT 1916 4 18 -1 -1 DI -1 -1 -1 -1 -1 -1 119.TIF NORTH CHANNEL OF THE STRAITS 1917 3 6 20 -1 SO -1 -1 -1 -1 -1 -1 120.TIF 1917 3 20 -1 -1 NC -1 -1 SC 24 -1 -1 -1 122.TIF 1917 3 27 -1 -1 IP -1 -1 -1 -1 -1 -1 123.TIF 1917 4 3 -1 -1 RT -1 -1 -1 -1 -1 -1 124.TIF 1917 4 17 -1 -1 DI -1 -1 -1 -1 -1 -1 126.TIF EAST TO BOIS BLANC ISLAND LT. 1917 4 17 -1 -1 DI -1 -1 -1 -1 -1 -1 126.TIF NORTHWARD 1917 4 23 -1 -1 DI -1 -1 -1 -1 -1 -1 127.TIF STRAITS 1920 3 30 -1 -1 RT -1 -1 -1 -1 -1 -1 143.TIF CHANNEL 1920 3 30 -1 -1 OW -1 -1 -1 -1 -1 -1 143.TIF EAST OF BOIS BLANC ISLAND LT. 1920 4 8 -1 -1 OW -1 -1 -1 -1 -1 -1 145.TIF STRAITS 1922 3 21 -1 -1 OW -1 -1 -1 -1 -1 -1 151.TIF 2Mi EAST OF ISLAND 1922 4 4 -1 -1 FD -1 -1 -1 -1 -1 -1 153.TIF EAST OF ISLAND 1923 4 10 24 30 SC -1 -1 -1 -1 -1 -1 160.TIF 1923 4 17 24 -1 SC -1 -1 -1 -1 -1 -1 161.TIF 1923 4 24 -1 -1 OW -1 -1 -1 -1 -1 -1 162.TIF 8Mi EAST 1925 3 17 -1 -1 IP -1 -1 -1 -1 -1 -1 171.TIF 1925 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 173.TIF TO MACATTAWA TO N OF PENTWATER 1925 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 173.TIF TO MACKINAW 1925 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 173.TIF NORTH CHANNEL 1925 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 174.TIF TO THE EAST 1925 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 174.TIF TO THE WEST 1926 3 2 12 -1 SO -1 -1 -1 -1 -1 -1 176.TIF 1926 3 9 -1 -1 SO -1 -1 -1 -1 -1 -1 177.TIF 1926 3 23 -1 -1 FD -1 -1 -1 -1 -1 -1 179.TIF EAST TO CHEBOYGAN 1926 4 6 -1 -1 IP -1 -1 -1 -1 -1 -1 181.TIF 1926 4 13 -1 -1 SW -1 -1 -1 -1 -1 -1 182.TIF 4Mi EAST 1926 4 20 -1 -1 NC -1 -1 -1 -1 -1 -1 183.TIF 1926 4 27 -1 -1 BK -1 -1 -1 -1 -1 -1 184.TIF 1926 4 27 -1 -1 OW -1 -1 -1 -1 -1 -1 184.TIF SOUTH CHANNEL 1927 3 8 -1 -1 FD -1 -1 SO -1 -1 -1 -1 185.TIF EASTWARD 1927 3 15 -1 -1 SO -1 -1 -1 -1 -1 -1 186.TIF EASTWARD 1927 3 22 -1 -1 OW -1 -1 -1 -1 -1 -1 187.TIF TO ST. IGNACE 1927 3 22 -1 -1 FD -1 -1 -1 -1 -1 -1 187.TIF EASTWARD 1927 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 188.TIF WESTWARD TO MCGULPINS POINT 1927 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 188.TIF EAST & WEST 1927 3 29 -1 -1 IP -1 -1 NS -1 -1 -1 -1 188.TIF SOUTH PASSAGE 1927 4 5 -1 -1 OW -1 -1 -1 -1 -1 -1 189.TIF 1928 3 6 -1 -1 OW -1 -1 -1 -1 -1 -1 190.TIF EASTWARD 1928 3 6 -1 -1 FD -1 -1 -1 -1 -1 -1 190.TIF WESTWARD 1928 3 13 -1 -1 FD -1 -1 SO -1 -1 -1 -1 191.TIF EASTWARD 1928 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 193.TIF EASTWARD 1928 4 3 -1 -1 IP -1 -1 IN -1 -1 -1 -1 194.TIF 1929 3 19 -1 -1 OW -1 -1 -1 -1 -1 -1 198.TIF 4Mi EAST OF ISLAND 1929 3 26 -1 -1 OW -1 -1 -1 -1 -1 -1 199.TIF EAST OF ISLAND 1930 3 4 -1 -1 IP -1 -1 BV -1 -1 -1 -1 202.TIF 1930 3 25 -1 -1 OW -1 -1 -1 -1 -1 -1 205.TIF 3Mi EAST OF ISLAND 1930 3 25 -1 -1 FD -1 -1 BK -1 -1 -1 -1 205.TIF NORTH SIDE 1930 4 1 -1 -1 NC -1 -1 -1 -1 -1 -1 206.TIF 1930 4 8 -1 -1 NC -1 -1 -1 -1 -1 -1 207.TIF 1931 3 3 -1 -1 FD -1 -1 WI -1 -1 -1 -1 209.TIF TO 2Mi EAST 1931 3 10 8 -1 NC -1 -1 -1 -1 -1 -1 210.TIF 1931 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 212.TIF 3Mi EAST OF ISLAND 1932 3 15 -1 -1 OW -1 -1 -1 -1 -1 -1 216.TIF EASTWARD 1932 3 22 -1 -1 OW -1 -1 -1 -1 -1 -1 217.TIF NORTHEAST 1932 3 22 -1 -1 IP -1 -1 BV -1 -1 -1 -1 217.TIF WEST & SOUTHEAST 1932 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 525.TIF EASTWARD 1932 3 29 -1 -1 IJ -1 -1 -1 -1 -1 -1 525.TIF SOUTH CHANNEL 1932 3 29 -1 -1 BK -1 -1 -1 -1 -1 -1 525.TIF WESTWARD TO MACKINAW 1932 4 5 -1 -1 BK -1 -1 DI -1 -1 -1 -1 218.TIF SOUTH CHANNEL 1934 3 13 18 30 SO -1 -1 BV -1 -1 -1 -1 229.TIF IN ALL DIRECTIONS 1934 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 234.TIF TO ROUND ISLAND 1934 4 24 -1 -1 OW -1 -1 -1 -1 -1 -1 235.TIF EASTWARD 1935 3 5 10 24 IP -1 -1 BV -1 -1 -1 -1 237.TIF 1935 3 12 -1 -1 WI -1 -1 -1 -1 -1 -1 238.TIF WESTWARD 1935 3 26 -1 -1 IP -1 -1 RT -1 -1 -1 -1 240.TIF TO 3Mi EAST OF ISLAND 1936 3 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 245.TIF 1936 3 23 -1 -1 NS -1 -1 -1 -1 -1 -1 246.TIF TO ROUND ISLAND 1936 3 23 -1 -1 PN -1 -1 -1 -1 -1 -1 246.TIF TO 7Mi EASTWARD IN N CHANNEL 1936 3 30 -1 -1 OW -1 -1 BV -1 -1 -1 -1 247.TIF EASTWARD 1936 4 6 -1 -1 OW -1 -1 BV -1 -1 -1 -1 248.TIF EASTWARD 1937 3 8 -1 -1 OW -1 -1 BV -1 -1 -1 -1 254.TIF TO LAKE HURON 1937 3 15 4 6 IP -1 -1 BV -1 -1 -1 -1 255.TIF EASTWARD 1937 3 22 -1 -1 OW -1 -1 -1 -1 -1 -1 256.TIF EASTWARD 1937 3 29 -1 -1 DI -1 -1 BV -1 -1 -1 -1 257.TIF EASTWARD 1937 4 5 -1 -1 OW -1 -1 BV -1 -1 -1 -1 258.TIF EASTWARD 1938 3 14 -1 -1 WI -1 -1 -1 -1 -1 -1 262.TIF 1938 4 11 -1 -1 OW -1 -1 BV -1 -1 -1 -1 266.TIF WESTWARD 1939 3 6 -1 -1 OW -1 -1 -1 -1 -1 -1 268.TIF EASTWARD 1939 3 13 9 -1 DI -1 -1 BV -1 -1 -1 -1 269.TIF EASTWARD 1939 3 20 -1 -1 DI -1 -1 -1 -1 -1 -1 270.TIF EASTWARD 1939 3 27 -1 -1 DI -1 -1 -1 -1 -1 -1 271.TIF EASTWARD & OFF CROSS VILLAGE 1939 4 3 -1 -1 OW -1 -1 -1 -1 -1 -1 272.TIF TO ST. IGNACE 1939 4 10 -1 -1 BK -1 -1 DI -1 -1 RT -1 -1 273.TIF EASTWARD 1939 4 10 -1 -1 SW -1 -1 -1 -1 -1 -1 273.TIF TO ST. IGNACE 1939 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 274.TIF EASTWARD 1940 3 4 -1 -1 FD -1 -1 -1 -1 -1 -1 277.TIF EAST TO GOOSE ISLAND 1940 4 1 -1 -1 OW -1 -1 -1 -1 -1 -1 281.TIF TO WEST OF MACKINAW CITY 1940 4 8 -1 -1 OW -1 -1 BV -1 -1 -1 -1 282.TIF EASTWARD 1941 3 10 -1 -1 SO -1 -1 -1 -1 -1 -1 286.TIF TO 9Mi EASTWARD 1942 3 9 -1 -1 HF -1 -1 -1 -1 -1 -1 292.TIF WESTWARD INTO L. MICHIGAN 1942 3 9 -1 -1 LI -1 -1 -1 -1 -1 -1 292.TIF EASTWARD INTO L. HURON 1942 3 16 -1 -1 HF -1 -1 -1 -1 -1 -1 293.TIF TO 2Mi OUT OFF EAST SHORE 1942 3 30 -1 -1 OW -1 -1 -1 -1 -1 -1 295.TIF WESTWARD 1943 3 1 -1 -1 IP -1 -1 BV -1 -1 -1 -1 298.TIF IN ALL DIRECTIONS 1943 3 29 -1 -1 SO -1 -1 -1 -1 -1 -1 302.TIF TO 3Mi EASTWARD 1943 3 29 6 11 -1 -1 -1 -1 -1 -1 302.TIF TO ROUND ISLAND 1943 4 12 18 -1 BK -1 -1 RT -1 -1 -1 -1 304.TIF WESTWARD 1943 4 12 -1 -1 DI -1 -1 IN -1 -1 -1 -1 304.TIF EASTWARD 1943 4 19 -1 -1 OW -1 -1 -1 -1 -1 -1 305.TIF WEST TO BEYOND MACKINAW CITY 1943 4 26 -1 -1 OW -1 -1 -1 -1 -1 -1 306.TIF TO BEYOND ISLE AUX GALETS 1944 3 6 -1 -1 OW -1 -1 -1 -1 -1 -1 308.TIF EASTWARD 1944 3 13 4 -1 CL -1 -1 -1 -1 -1 -1 309.TIF TO 4Mi EAST 1944 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 309.TIF BEYOND 4Mi EAST 1944 3 20 -1 -1 FD -1 -1 NI -1 -1 WI -1 -1 310.TIF EASTWARD 1944 3 27 -1 -1 SW -1 -1 BV -1 -1 -1 -1 311.TIF EASTWARD 1944 4 10 -1 -1 DI -1 -1 -1 -1 -1 -1 313.TIF EASTWARD 1945 3 19 -1 -1 OW -1 -1 BV -1 -1 -1 -1 315.TIF EASTWARD 1947 2 19 -1 -1 LF -1 -1 -1 -1 -1 -1 324.TIF TO ROUND ISLAND 1947 3 3 -1 -1 LF -1 -1 -1 -1 -1 -1 326.TIF TO ROUND ISLAND 1947 3 3 -1 -1 FD -1 -1 -1 -1 -1 -1 326.TIF TO PORT HURON 1947 3 17 10 14 SO -1 -1 -1 -1 -1 -1 328.TIF 1947 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 329.TIF CHANNEL TO ROUND ISLAND 1947 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 330.TIF THROUGH THE NORTH CHANNEL 1947 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 330.TIF TO 5Mi EAST IN SOUTH CHANNEL 1947 3 31 -1 -1 SO -1 -1 -1 -1 -1 -1 330.TIF SOUTH CHANNEL SHORE 1947 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 331.TIF TO 3Mi W OF ST. HELENA ISLAND 1947 4 14 -1 -1 DI -1 -1 -1 -1 -1 -1 332.TIF TO 6Mi WESTWARD 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 1950 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 356.TIF TO NEAR ST. HELENA 1951 3 12 -1 -1 OW -1 -1 -1 -1 -1 -1 361.TIF TO 1Mi W OF OLD MACKINAC POINT 1951 3 19 -1 -1 OW -1 -1 -1 -1 -1 -1 362.TIF TO 1Mi W OF OLD MACKINAC POINT 1954 3 1 -1 -1 OW -1 -1 -1 -1 -1 -1 381.TIF WEST: TO MCGULPINS POINT 1954 3 15 -1 -1 SW -1 -1 -1 -1 -1 -1 383.TIF WESTWARD 1955 2 28 -1 -1 HF -1 -1 DI -1 -1 -1 -1 389.TIF E & N 1955 3 7 -1 -1 DI -1 -1 SO -1 -1 -1 -1 391.TIF NORTHWARD 1955 3 7 -1 -1 DI -1 -1 -1 -1 -1 -1 391.TIF FROM 3 TO 6Mi EASTWARD 1955 3 7 -1 -1 OW -1 -1 -1 -1 -1 -1 391.TIF BEYOND 6Mi EASTWARD 1956 3 5 -1 -1 SO -1 -1 WI -1 -1 -1 -1 399.TIF TO OLD MACKINAC POINT 1956 3 5 -1 -1 OW -1 -1 -1 -1 -1 -1 399.TIF EAST OF ISLAND 1957 2 25 18 -1 FD -1 -1 SO -1 -1 -1 -1 407.TIF TO MACKINAC CITY 1957 2 25 -1 -1 LF -1 -1 -1 -1 -1 -1 407.TIF EAST OF ISLAND 1957 2 25 -1 -1 PN -1 -1 -1 -1 -1 -1 407.TIF NORTH OF ISLAND 1957 3 4 8 -1 -1 -1 -1 -1 -1 -1 409.TIF 1957 3 4 -1 -1 PN -1 -1 SW -1 -1 -1 -1 409.TIF EAST OF ISLAND 1957 3 4 20 -1 FD -1 -1 SO -1 -1 -1 -1 409.TIF TO MACKINAW CITY 1957 3 25 -1 -1 LF -1 -1 -1 -1 -1 -1 413.TIF TO ST. IGNACE 1957 4 1 -1 -1 OW -1 -1 -1 -1 -1 -1 414.TIF TO 2Mi WEST OF ST. HELENA 1958 3 3 -1 -1 SO -1 -1 CL -1 -1 BV -1 -1 417.TIF IN LAKE HURON & WESTWARD 1958 3 10 15 -1 SO -1 -1 SW -1 -1 -1 -1 418.TIF 1958 3 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 419.TIF WESTWARD 1959 3 2 -1 -1 WI -1 -1 -1 -1 -1 -1 424.TIF W OF MACKINAC BRIDGE 1961 3 6 4 8 RT -1 -1 -1 -1 -1 -1 441.TIF TO ST. IGNACE 1961 3 13 4 17 FD -1 -1 RT -1 -1 SI -1 -1 442.TIF TO ST. IGNACE 1961 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 443.TIF TO MACKINAC BRIDGE 1961 3 27 -1 -1 LI -1 -1 DI -1 -1 -1 -1 444.TIF WESTWARD TO NEAR WHITE SHOALS 1962 2 26 12 36 -1 -1 -1 -1 -1 -1 447.TIF 1962 2 26 -1 -1 FS -1 -1 CL -1 -1 IR -1 -1 447.TIF TO ROUND ISLAND PASSAGE 1962 3 19 12 36 -1 -1 -1 -1 -1 -1 450.TIF 1962 4 9 -1 -1 OW -1 -1 -1 -1 -1 -1 453.TIF TO ST. HELENA 1963 3 11 30 -1 SO -1 -1 WI -1 -1 -1 -1 458.TIF TO BRIDGE 1964 3 23 -1 -1 LF -1 -1 SW -1 -1 -1 -1 469.TIF W TO 5Mi E OF WHITE SHOALS 1965 4 5 -1 -1 SW -1 -1 -1 -1 -1 -1 479.TIF WESTWARD 1965 4 12 -1 -1 OW -1 -1 -1 -1 -1 -1 480.TIF TO BRIDGE 1966 3 7 -1 -1 DI -1 -1 -1 -1 -1 -1 484.TIF TO BRIDGE 1966 3 14 -1 -1 DI -1 -1 WI -1 -1 -1 -1 485.TIF W TO BRIDGE 1967 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 493.TIF E THROUGH NORTHERN 1/2 OF LAKE 1968 2 26 13 -1 -1 -1 -1 -1 -1 -1 521.TIF 1968 3 18 -1 -1 WI -1 72 -1 -1 -1 -1 498.TIF E OF ISLAND 1970 2 24 -1 -1 IR -1 -1 -1 -1 -1 -1 519.TIF TO ST. IGNACE 1970 4 14 -1 -1 DI -1 -1 BK -1 -1 -1 -1 516.TIF TO BRIDGE (50% ICE COVER) ---------------------------------------------------------------------------------------------------------- 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.