GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970 Site No. 494, Approximate Location: 44.83 N. Latitude, 75.30 W. Longitude Site Name Iroquois Lock on St. Lawrence River ---------------------------------------------------------------------------------------------------------- Year Mo Da T1 T2 C1 T1C1 T2C1 C2 T1C2 T2C2 C3 T1C3 T2C3 IMAGE Supplemental Information ---------------------------------------------------------------------------------------------------------- 1962 2 26 22 -1 CL -1 -1 SC -1 -1 BV -1 -1 447.TIF 1962 3 5 23 -1 -1 -1 -1 -1 -1 -1 448.TIF 1962 3 12 24 -1 CL -1 -1 RT 4 -1 FS -1 -1 449.TIF 1962 3 19 22 -1 FS -1 -1 RT 2 3 BV -1 -1 450.TIF 1962 3 26 22 -1 FS -1 -1 CL -1 -1 RT -1 -1 451.TIF TO 3/4Mi WEST 1962 3 26 -1 -1 OW -1 -1 BV -1 -1 -1 -1 451.TIF MAIN CHANNEL 1962 4 2 -1 -1 OW -1 -1 -1 -1 -1 -1 452.TIF 1963 2 25 18 -1 CL -1 -1 -1 -1 BV -1 -1 456.TIF ABOVE LOCK 1963 3 4 21 -1 SO -1 -1 CL -1 -1 BV -1 -1 457.TIF 1963 3 11 22 -1 SO -1 -1 CL -1 -1 -1 -1 458.TIF 1963 3 18 23 -1 -1 -1 -1 -1 -1 -1 459.TIF 1963 3 25 21 -1 CL -1 -1 -1 -1 -1 -1 460.TIF 1963 4 1 16 -1 CL -1 -1 -1 -1 -1 -1 461.TIF 1963 4 8 -1 -1 OW -1 -1 BV -1 -1 -1 -1 462.TIF TO THE E & W 1964 3 2 25 -1 FS -1 -1 -1 -1 -1 -1 466.TIF E & W OF LOCK #7 1964 3 16 20 -1 CL -1 -1 -1 -1 -1 -1 468.TIF LOCK #7 1964 3 16 -1 -1 OW -1 -1 -1 -1 -1 -1 468.TIF BELOW IROQUOIS DAM 1964 3 23 20 -1 CL -1 -1 -1 -1 -1 -1 469.TIF TO 1/4Mi BELOW LOCK #7 1964 3 23 20 -1 CL -1 -1 -1 -1 -1 -1 469.TIF FOR 1/2Mi ABOVE LOCK #7 1964 3 23 -1 -1 OW -1 -1 -1 -1 -1 -1 469.TIF BEYOND 1/2Mi ABOVE LOCK #7 1964 3 23 -1 -1 OW -1 -1 -1 -1 -1 -1 469.TIF BEYOND 1/4Mi BELOW LOCK #7 1965 3 15 -1 -1 NS -1 -1 -1 -1 -1 -1 476.TIF 1965 3 22 -1 -1 OW -1 -1 BV -1 -1 -1 -1 477.TIF LOCK #7 1965 4 12 -1 -1 OW -1 -1 BV -1 -1 -1 -1 480.TIF 1967 3 20 -1 -1 FS -1 -1 CL -1 -1 -1 -1 492.TIF 1967 3 20 -1 -1 OW -1 -1 -1 -1 -1 -1 492.TIF IN FRONT OF CONTROL DAM 1967 4 3 -1 -1 OW -1 -1 -1 -1 -1 -1 494.TIF ABOVE & BELOW LOCK 1970 3 10 -1 -1 IP -1 -1 SW -1 -1 -1 -1 511.TIF BELOW LOCK: ALONG SHORE 1970 3 10 -1 -1 FS -1 -1 SC -1 -1 -1 -1 511.TIF ABOVE LOCK ---------------------------------------------------------------------------------------------------------- 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.