GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 474, Approximate Location: 43.26 N. Latitude, 77.60 W. Longitude Site Name Rochester Harbor on Lake Ontario ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1918 4 16 -1 -1 OW -1 -1 -1 -1 -1 -1 134.TIF 1934 3 6 8 -1 -1 -1 -1 -1 -1 -1 228.TIF TO 3Mi OUT 1936 3 17 -1 -1 OW -1 -1 -1 -1 -1 -1 245.TIF 1939 3 6 -1 -1 OW -1 -1 -1 -1 -1 -1 268.TIF 1939 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 269.TIF 1939 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 270.TIF 1940 3 4 -1 -1 OW -1 -1 -1 -1 -1 -1 277.TIF 1940 3 11 -1 -1 OW -1 -1 -1 -1 -1 -1 278.TIF 1940 3 18 -1 -1 OW -1 -1 -1 -1 -1 -1 279.TIF 1941 3 10 -1 -1 OW -1 -1 -1 -1 -1 -1 286.TIF EXCEPT FOR SHORE ICE 1941 3 17 -1 -1 OW -1 -1 -1 -1 -1 -1 287.TIF 1942 3 9 -1 -1 OW -1 -1 -1 -1 -1 -1 292.TIF 1942 3 23 -1 -1 OW -1 -1 -1 -1 -1 -1 294.TIF 1943 3 8 -1 -1 OW -1 -1 -1 -1 -1 -1 299.TIF 1943 3 15 -1 -1 OW -1 -1 -1 -1 -1 -1 300.TIF 1943 3 22 -1 -1 OW -1 -1 -1 -1 -1 -1 301.TIF 1943 3 29 -1 -1 OW -1 -1 -1 -1 -1 -1 302.TIF 1944 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 309.TIF 1944 3 20 -1 -1 DI -1 -1 -1 -1 -1 -1 310.TIF 1944 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 311.TIF 1945 3 19 -1 -1 OW -1 -1 -1 -1 -1 -1 315.TIF 1946 3 4 -1 -1 OW -1 -1 -1 -1 -1 -1 318.TIF 1947 3 3 -1 -1 OW -1 -1 -1 -1 -1 -1 326.TIF 1947 3 17 -1 -1 OW -1 -1 -1 -1 -1 -1 328.TIF 1947 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 329.TIF 1964 2 24 -1 -1 OW -1 -1 -1 -1 -1 -1 465.TIF 1964 3 2 -1 -1 OW -1 -1 -1 -1 -1 -1 466.TIF 1965 3 8 -1 -1 OW -1 -1 -1 -1 -1 -1 475.TIF 1966 3 7 -1 -1 OW -1 -1 -1 -1 -1 -1 484.TIF 1966 3 14 -1 -1 OW -1 -1 -1 -1 -1 -1 485.TIF 1966 3 21 -1 -1 OW -1 -1 -1 -1 -1 -1 486.TIF 1967 3 6 -1 -1 OW -1 -1 -1 -1 -1 -1 490.TIF 1967 3 13 -1 -1 OW -1 -1 -1 -1 -1 -1 491.TIF 1967 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 492.TIF 1967 3 27 -1 -1 OW -1 -1 -1 -1 -1 -1 493.TIF 1968 3 11 -1 -1 OW -1 -1 -1 -1 -1 -1 497.TIF 1968 3 18 -1 -1 OW -1 -1 -1 -1 -1 -1 498.TIF 1968 3 25 -1 -1 OW -1 -1 -1 -1 -1 -1 499.TIF 1969 2 24 2 -1 -1 -1 -1 -1 -1 -1 503.TIF (20% ICE COVER) 1969 3 3 9 -1 -1 -1 -1 -1 -1 -1 504.TIF (20% ICE COVER) 1969 3 10 8 -1 -1 -1 -1 -1 -1 -1 505.TIF (10% ICE COVER) 1969 3 17 5 -1 -1 -1 -1 -1 -1 -1 506.TIF 1969 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 507.TIF 1970 3 24 -1 -1 OW -1 -1 -1 -1 -1 -1 513.TIF 1970 3 31 -1 -1 OW -1 -1 -1 -1 -1 -1 514.TIF 1970 4 7 -1 -1 OW -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.