GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 231, Approximate Location: 45.78 N. Latitude, 84.72 W. Longitude Site Name Mackinaw City on Lake Michigan ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1899 4 11 -1 -1 RT -1 -1 -1 -1 -1 -1 529.TIF 1899 4 18 -1 -1 NC -1 -1 SW -1 -1 -1 -1 001.TIF 1899 4 25 -1 -1 BK -1 -1 RT -1 -1 -1 -1 002.TIF 1900 3 6 20 -1 SO -1 -1 -1 -1 -1 -1 004.TIF 1900 3 20 24 -1 IN -1 -1 -1 -1 -1 -1 006.TIF 1900 3 27 24 -1 SO -1 -1 SC -1 -1 -1 -1 007.TIF 1901 3 5 18 24 WI -1 -1 -1 -1 -1 -1 011.TIF MACKINAW 1901 3 12 24 -1 NC -1 -1 -1 -1 -1 -1 012.TIF 1901 3 19 24 -1 SO -1 -1 -1 -1 -1 -1 013.TIF MACKINAW 1901 3 26 20 -1 DC -1 -1 -1 -1 -1 -1 014.TIF MACKINAW 1901 4 2 10 19 -1 -1 -1 -1 -1 -1 015.TIF MACKINAW 1901 4 7 -1 -1 BK -1 -1 RT -1 -1 SW -1 -1 016.TIF STRAITS 1901 4 7 -1 -1 IR -1 -1 -1 -1 -1 -1 016.TIF MACKINAW TO CHEBOYGAN 1901 4 16 -1 -1 DI -1 -1 RT -1 -1 -1 -1 017.TIF STRAITS 1902 3 4 14 16 -1 -1 -1 -1 -1 -1 019.TIF 1902 3 11 -1 -1 IP -1 -1 -1 -1 -1 -1 020.TIF HARBOR 1902 3 18 -1 -1 IP -1 -1 -1 -1 -1 -1 021.TIF HARBOR 1902 3 25 -1 -1 NC -1 -1 -1 -1 -1 -1 022.TIF HARBOR 1902 4 1 -1 -1 OW -1 -1 -1 -1 -1 -1 023.TIF HARBOR 1903 3 3 14 -1 WI -1 -1 -1 -1 -1 -1 024.TIF STRAITS 1903 3 10 -1 -1 IP -1 -1 -1 -1 -1 -1 025.TIF TO MACKINAC ISLAND 1903 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 027.TIF STRAITS 1903 3 31 -1 -1 BK -1 -1 -1 -1 -1 -1 028.TIF HARBOR 1904 3 1 25 -1 WI -1 -1 -1 -1 -1 -1 029.TIF 1904 3 8 -1 -1 NC -1 -1 SC -1 -1 -1 -1 030.TIF HARBOR 1904 3 15 -1 -1 NC -1 -1 SC -1 -1 -1 -1 031.TIF HARBOR 1904 3 22 -1 -1 NC -1 -1 SO -1 -1 SC -1 -1 032.TIF HARBOR 1904 3 29 20 -1 NC -1 -1 -1 -1 -1 -1 033.TIF HARBOR CHANNEL 1904 4 5 18 -1 SO -1 -1 RT -1 -1 -1 -1 034.TIF CHANNEL 1904 4 12 10 -1 CL -1 -1 RT -1 -1 -1 -1 035.TIF HARBOR CHANNEL 1904 4 19 -1 -1 IP -1 -1 -1 -1 -1 -1 036.TIF HARBOR 1904 4 26 -1 -1 OW -1 -1 -1 -1 -1 -1 037.TIF TO CHEBOYGAN 1904 5 3 -1 -1 OW -1 -1 -1 -1 -1 -1 038.TIF STRAITS 1905 3 7 24 -1 SO -1 -1 -1 -1 -1 -1 039.TIF HARBOR 1905 3 7 -1 -1 SC -1 -1 -1 -1 -1 -1 039.TIF STRAITS 1905 3 14 -1 -1 NC -1 -1 -1 -1 -1 -1 040.TIF 1905 3 21 -1 -1 SC -1 -1 -1 -1 -1 -1 041.TIF STRAITS 1905 3 28 -1 -1 RT -1 -1 -1 -1 -1 -1 042.TIF 1905 4 4 -1 -1 RT -1 -1 -1 -1 -1 -1 043.TIF 1905 4 11 -1 -1 SO -1 -1 -1 -1 -1 -1 044.TIF TO WAUGOSHANCE 1905 4 11 -1 -1 BK -1 -1 -1 -1 -1 -1 044.TIF TO CHEBOYGAN 1906 3 6 -1 -1 IP -1 -1 -1 -1 -1 -1 045.TIF 1906 3 13 -1 -1 IP -1 -1 -1 -1 -1 -1 046.TIF HARBOR 1906 3 20 -1 -1 IP -1 -1 -1 -1 -1 -1 047.TIF HARBOR 1906 3 27 -1 -1 IP -1 -1 -1 -1 -1 -1 048.TIF HARBOR 1907 3 5 16 -1 -1 -1 -1 -1 -1 -1 051.TIF MACKINAW 1907 3 12 -1 -1 NC -1 -1 -1 -1 -1 -1 052.TIF MACKINAW 1907 3 19 -1 -1 RT -1 -1 -1 -1 -1 -1 053.TIF MACKINAW 1907 3 26 -1 -1 BK -1 -1 -1 -1 -1 -1 054.TIF MACKINAW TO MCGULPINS POINT 1907 3 26 -1 -1 IP -1 -1 -1 -1 -1 -1 054.TIF FROM MCGULPINS POINT: WESTWARD 1907 3 26 -1 -1 SO -1 -1 RT -1 -1 -1 -1 054.TIF MACKINAW TO CHEBOYGAN 1908 3 10 12 -1 NC -1 -1 -1 -1 -1 -1 058.TIF MACKINAW 1908 3 24 12 -1 SO -1 -1 -1 -1 -1 -1 060.TIF MACKINAW 1908 3 31 12 -1 SO -1 -1 -1 -1 -1 -1 524.TIF HARBOR 1908 4 7 12 -1 RT -1 -1 -1 -1 -1 -1 061.TIF MACKINAW 1908 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 061.TIF MACKINAW: TO 2Mi OUT OFF POINT 1908 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 061.TIF MCGULPINS POINT TO WAUGOSHANCE 1908 4 7 -1 -1 IP -1 -1 -1 -1 -1 -1 061.TIF MACKINAW TO CHEBOYGAN 1908 4 14 -1 -1 OW -1 -1 -1 -1 -1 -1 062.TIF MACKINAW: NEARLY TO ST. HELENA 1909 3 2 20 -1 -1 -1 -1 -1 -1 -1 064.TIF SMOOTH ICE AREAS 1909 3 16 20 -1 NC -1 -1 -1 -1 -1 -1 066.TIF MACKINAW 1909 3 23 20 -1 NC -1 -1 -1 -1 -1 -1 067.TIF MACKINAW 1909 4 13 -1 -1 DI -1 -1 SC -1 -1 -1 -1 070.TIF STRAITS 1910 3 1 -1 -1 IP -1 -1 -1 -1 -1 -1 071.TIF STRAITS 1910 3 8 10 -1 RT -1 -1 SC -1 -1 -1 -1 072.TIF MACKINAW 1910 3 15 10 -1 SO -1 -1 -1 -1 -1 -1 073.TIF MACKINAW 1910 3 22 10 -1 -1 -1 -1 -1 -1 -1 074.TIF STRAITS 1910 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 075.TIF STRAITS 1911 3 7 22 -1 -1 -1 -1 -1 -1 -1 077.TIF HARBOR 1911 3 7 -1 -1 WI -1 -1 -1 -1 -1 -1 077.TIF MCGULPINS POINT: WESTWARD 1911 3 14 20 -1 -1 -1 -1 -1 -1 -1 078.TIF HARBOR 1911 3 21 20 -1 NC -1 -1 -1 -1 -1 -1 079.TIF HARBOR 1911 3 28 12 -1 RT -1 -1 -1 -1 -1 -1 080.TIF HARBOR 1911 4 4 10 -1 -1 -1 -1 -1 -1 -1 081.TIF HARBOR 1911 4 4 -1 -1 FD -1 -1 -1 -1 -1 -1 081.TIF 1912 3 5 24 -1 SO -1 -1 -1 -1 -1 -1 082.TIF STRAITS 1912 3 19 22 -1 -1 -1 -1 -1 -1 -1 084.TIF STRAITS 1912 3 26 24 -1 NC -1 -1 -1 -1 -1 -1 085.TIF STRAITS 1912 4 2 22 -1 SO -1 -1 -1 -1 -1 -1 086.TIF MACKINAW 1912 4 9 -1 -1 BK -1 -1 -1 -1 -1 -1 087.TIF MACKINAW: TO 2Mi WEST 1912 4 9 -1 -1 SO -1 -1 -1 -1 -1 -1 087.TIF MACKINAW: TO THE EAST AND WEST 1912 4 16 -1 -1 DI -1 -1 -1 -1 -1 -1 088.TIF STRAITS 1912 4 23 -1 -1 LI -1 -1 -1 -1 -1 -1 089.TIF STRAITS 1913 3 4 16 20 WI -1 -1 -1 -1 -1 -1 090.TIF STRAITS 1913 3 4 -1 -1 FD -1 -1 -1 -1 -1 -1 090.TIF LAKE 1913 3 11 20 -1 -1 -1 -1 -1 -1 -1 091.TIF MACKINAW 1913 3 18 16 20 NC -1 -1 -1 -1 -1 -1 092.TIF MACKINAW 1913 3 25 20 -1 SO -1 -1 -1 -1 -1 -1 093.TIF MACKINAW 1913 4 1 10 -1 -1 -1 -1 -1 -1 -1 094.TIF MACKINAW 1913 4 8 -1 -1 RT -1 -1 -1 -1 -1 -1 095.TIF STRAITS 1913 4 14 -1 -1 SO -1 -1 -1 -1 -1 -1 096.TIF MCGULPINS POINT: WESTWARD 1913 4 22 -1 -1 DI -1 -1 -1 -1 -1 -1 097.TIF STRAITS 1914 3 3 14 -1 SO -1 -1 -1 -1 -1 -1 098.TIF POINT AU SABLE TO WHITE SHOAL 1914 3 10 14 -1 NC -1 -1 -1 -1 -1 -1 099.TIF MACKINAW 1914 3 17 14 -1 WT -1 -1 RT -1 -1 -1 -1 100.TIF MACKINAW 1914 3 24 14 -1 SO -1 -1 -1 -1 -1 -1 101.TIF MACKINAW 1914 3 31 12 -1 RT -1 -1 -1 -1 -1 -1 102.TIF MACKINAW 1914 4 7 10 -1 -1 -1 -1 -1 -1 -1 103.TIF MACKINAW 1914 4 7 -1 -1 OW -1 -1 -1 -1 -1 -1 103.TIF MACKINAW: OFF THE POINT 1914 4 13 -1 -1 BK -1 -1 -1 -1 -1 -1 104.TIF STRAITS 1914 4 21 -1 -1 OW -1 -1 -1 -1 -1 -1 105.TIF STRAITS 1915 3 16 12 -1 NC -1 -1 -1 -1 -1 -1 107.TIF STRAITS 1915 3 23 12 -1 SO -1 -1 RT -1 -1 -1 -1 108.TIF STRAITS 1915 3 30 12 -1 SO -1 -1 -1 -1 -1 -1 109.TIF MACKINAW 1915 4 6 10 -1 RT -1 -1 -1 -1 -1 -1 110.TIF MACKINAW 1915 4 6 -1 -1 OW -1 -1 -1 -1 -1 -1 110.TIF MACKINAW: OFF THE POINT 1915 4 6 -1 -1 LI -1 -1 -1 -1 -1 -1 110.TIF MACKINAW: WESTWARD 1915 4 12 -1 -1 OW -1 -1 -1 -1 -1 -1 111.TIF STRAITS 1916 3 14 15 18 SC -1 -1 IN -1 -1 -1 -1 114.TIF STRAITS 1916 3 21 20 -1 SO -1 -1 IN -1 -1 -1 -1 115.TIF HARBOR 1916 3 28 18 -1 RT -1 -1 -1 -1 -1 -1 116.TIF MACKINAW 1916 4 4 16 -1 RT -1 -1 -1 -1 -1 -1 117.TIF HARBOR 1916 4 11 15 -1 -1 -1 -1 -1 -1 -1 118.TIF HARBOR 1916 4 17 -1 -1 OW -1 -1 -1 -1 -1 -1 119.TIF STRAITS: EASTWARD 1916 4 17 -1 -1 IP -1 -1 -1 -1 -1 -1 119.TIF WEST END OF STRAITS 1917 3 6 20 -1 -1 -1 -1 -1 -1 -1 120.TIF STRAITS 1917 3 6 -1 -1 PI -1 -1 SC -1 -1 -1 -1 120.TIF WEST END OF STRAITS 1917 3 13 20 -1 SC -1 -1 NC -1 -1 -1 -1 121.TIF STRAITS 1917 3 27 20 -1 CL -1 -1 -1 -1 -1 -1 123.TIF STRAITS 1917 4 3 20 -1 RT -1 -1 -1 -1 -1 -1 124.TIF STRAITS 1917 4 10 16 -1 SO -1 -1 -1 -1 -1 -1 125.TIF MACKINAW 1917 4 17 -1 -1 IP -1 -1 -1 -1 -1 -1 126.TIF STRAITS 1917 4 24 -1 -1 DI -1 -1 -1 -1 -1 -1 127.TIF STRAITS 1918 3 5 30 -1 SC -1 -1 -1 -1 -1 -1 128.TIF STRAITS 1918 3 12 30 -1 SO -1 -1 SC -1 -1 -1 -1 129.TIF HARBOR 1918 3 19 24 -1 -1 -1 -1 -1 -1 -1 130.TIF STRAITS 1918 3 26 24 -1 RT -1 -1 -1 -1 -1 -1 131.TIF HARBOR 1918 4 2 16 -1 RT -1 -1 -1 -1 -1 -1 132.TIF STRAITS 1918 4 9 -1 -1 DI -1 -1 RI -1 -1 -1 -1 133.TIF STRAITS 1919 3 4 -1 -1 SO -1 -1 -1 -1 -1 -1 136.TIF HARBOR 1919 3 4 10 -1 BK -1 -1 -1 -1 -1 -1 136.TIF STRAITS 1919 3 11 10 -1 -1 -1 -1 -1 -1 -1 137.TIF HARBOR 1919 3 11 -1 -1 PI -1 -1 -1 -1 -1 -1 137.TIF STRAITS 1919 3 11 -1 -1 OW -1 -1 -1 -1 -1 -1 137.TIF GRAHAM SHOALS TO ST. HELENA 1919 3 18 -1 -1 LI -1 -1 DI -1 -1 -1 -1 138.TIF STRAITS 1920 3 9 24 -1 -1 -1 -1 -1 -1 -1 140.TIF HARBOR 1920 3 9 16 24 PI -1 -1 -1 -1 -1 -1 140.TIF STRAITS 1920 3 16 24 -1 SO -1 -1 NC -1 -1 -1 -1 141.TIF STRAITS 1920 3 23 -1 -1 NC -1 -1 -1 -1 -1 -1 142.TIF MACKINAW 1920 3 30 -1 -1 BK -1 -1 DC -1 -1 -1 -1 143.TIF MACKINAW 1920 4 5 -1 -1 IP -1 -1 RI -1 -1 -1 -1 144.TIF STRAITS 1921 3 8 10 -1 -1 -1 -1 -1 -1 -1 146.TIF HARBOR 1922 4 11 -1 -1 RT -1 -1 -1 -1 -1 -1 154.TIF MACKINAW 1922 4 11 -1 -1 OW -1 -1 -1 -1 -1 -1 154.TIF MACKINAW: TO THE EAST 1923 4 24 -1 -1 IP -1 -1 -1 -1 -1 -1 162.TIF 1926 3 16 -1 -1 HF -1 -1 IN -1 -1 SC -1 -1 178.TIF MACKINAW 1928 3 6 18 -1 SC -1 -1 -1 -1 -1 -1 190.TIF MACKINAW 1928 4 3 -1 -1 RT -1 -1 SW -1 -1 -1 -1 194.TIF MACKINAW 1929 3 12 21 -1 IN -1 -1 -1 -1 -1 -1 197.TIF MACKINAW 1929 3 19 21 -1 SO -1 -1 -1 -1 -1 -1 198.TIF MACKINAW 1929 3 26 19 -1 RT -1 -1 -1 -1 -1 -1 199.TIF MACKINAW 1929 4 2 -1 -1 OW -1 -1 -1 -1 -1 -1 200.TIF MACKINAW: WESTWARD TO ST. HELE 1929 4 2 -1 -1 OW -1 -1 -1 -1 -1 -1 200.TIF EASTWARD TO BOIS BLANC ISLAND 1930 4 8 -1 -1 SW -1 -1 -1 -1 -1 -1 207.TIF MACKINAW 1931 3 24 -1 -1 IP -1 -1 BV -1 -1 -1 -1 212.TIF MACKINAW: TO THE EAST & WEST 1932 3 15 -1 -1 HF -1 -1 DI -1 -1 -1 -1 216.TIF STRAITS 1933 3 28 16 -1 IP -1 -1 BV -1 -1 -1 -1 223.TIF WESTWARD 1933 4 11 -1 -1 OW -1 -1 -1 -1 -1 -1 225.TIF TO ST. IGNACE 1933 4 11 -1 -1 IP -1 -1 RT -1 -1 -1 -1 225.TIF TO 8Mi EAST 1934 4 17 12 24 IP -1 -1 BV -1 -1 -1 -1 234.TIF IN ALL DIRECTIONS 1934 4 24 -1 -1 SO -1 -1 RT -1 -1 -1 -1 235.TIF TO 12Mi EAST 1934 4 24 -1 -1 SO -1 -1 BV -1 -1 RT -1 -1 235.TIF WESTWARD 1935 3 26 8 14 IP -1 -1 BV -1 -1 -1 -1 240.TIF 1935 4 2 8 10 NC -1 -1 -1 -1 -1 -1 241.TIF 1935 4 9 -1 -1 BK -1 -1 -1 -1 -1 -1 242.TIF 1936 3 17 -1 -1 IP -1 -1 BV -1 -1 -1 -1 245.TIF 1937 3 22 -1 -1 SW -1 -1 -1 -1 -1 -1 256.TIF TO GRAHAM SHOALS 1939 3 6 -1 -1 DI -1 -1 WI -1 -1 -1 -1 268.TIF WESTWARD: FROM 5Mi E OF CITY 1940 3 4 2 22 -1 -1 -1 -1 -1 -1 277.TIF 1940 3 11 5 12 -1 -1 -1 -1 -1 -1 278.TIF 1940 3 18 -1 -1 SW -1 -1 -1 -1 -1 -1 279.TIF TO MACKINAC ISLAND 1941 4 7 14 -1 RT -1 -1 -1 -1 -1 -1 290.TIF MACKINAW 1942 3 9 12 -1 -1 -1 -1 -1 -1 -1 292.TIF 1942 3 16 -1 -1 OW -1 -1 -1 -1 -1 -1 293.TIF 1943 4 12 -1 -1 PI -1 -1 -1 -1 -1 -1 304.TIF 1944 3 27 -1 -1 IP -1 -1 WI -1 -1 -1 -1 311.TIF 1944 4 10 -1 -1 HF -1 -1 PI -1 -1 -1 -1 313.TIF 1945 3 26 -1 -1 DI -1 -1 BV -1 -1 SW -1 -1 316.TIF WEST: INTO NORTH ABOUT PASSAGE 1945 3 26 -1 -1 LI -1 -1 DI -1 -1 RT -1 -1 316.TIF SOUTH ABOUT PASSAGE 1946 3 25 -1 -1 BK -1 -1 -1 -1 -1 -1 321.TIF TO NEAR WHITE SHOALS 1947 2 19 -1 -1 IP -1 -1 BV -1 -1 -1 -1 324.TIF LAKE HURON 1947 2 19 -1 -1 IP -1 -1 BV -1 -1 -1 -1 324.TIF LAKE MICHIGAN 1947 2 19 30 -1 -1 -1 -1 -1 -1 -1 324.TIF HARBOR 1947 3 3 30 -1 SC -1 -1 -1 -1 -1 -1 326.TIF HARBOR 1948 3 1 -1 -1 IP -1 -1 -1 -1 -1 -1 334.TIF 1948 4 5 -1 -1 IP -1 -1 -1 -1 -1 -1 339.TIF SOUTH CHANNEL 1949 2 28 -1 -1 DI -1 -1 WI -1 -1 -1 -1 526.TIF TO MACKINAC ISLAND 1951 3 5 -1 -1 OW -1 -1 -1 -1 -1 -1 360.TIF TO 4Mi OUT 1951 3 26 -1 -1 SW -1 -1 -1 -1 -1 -1 363.TIF 1953 2 24 -1 -1 IP -1 -1 WI -1 -1 -1 -1 375.TIF 1953 3 9 -1 -1 SW -1 -1 -1 -1 -1 -1 376.TIF FERRY DOCKS TO GRAHAM SHOALS 1955 3 21 -1 -1 BK -1 -1 -1 -1 -1 -1 394.TIF TO 2Mi OUT 1956 2 27 -1 -1 NI -1 -1 DI -1 -1 -1 -1 397.TIF TO ST. IGNACE 1956 3 12 -1 -1 NI -1 -1 DI -1 -1 SC 2 3 401.TIF 6 1956 3 19 -1 -1 SO -1 -1 WI -1 -1 -1 -1 402.TIF 1956 3 26 -1 -1 BK -1 -1 SW -1 -1 -1 -1 403.TIF 1962 2 26 -1 -1 BK -1 -1 -1 -1 -1 -1 447.TIF TO ST. IGNACE (CUT) 1962 4 2 6 24 FD -1 -1 FS -1 -1 RT -1 -1 452.TIF BRIDGE: TO LANSING SHOAL 1968 3 4 20 -1 -1 -1 -1 -1 -1 -1 520.TIF HARBOR ---------------------------------------------------------------------------------------------------------- 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.