GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, NOAA Climate Data Modernization Project
 National Weather Service Historical Great Lakes Ice Reports for Winters 1899 - 1970

 Site No. 493, Approximate Location: 45.03 N. Latitude, 74.75 W. Longitude
 Site Name  Cornwall                       on St. Lawrence River
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 Year Mo Da   T1   T2   C1  T1C1 T2C1  C2  T1C2 T2C2  C3 T1C3 T2C3  IMAGE   Supplemental Information
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 1963  4  8   -1   -1   OW   -1   -1        -1   -1       -1   -1  462.TIF   RIVER                           
 1963  4  8   -1   -1   OW   -1   -1        -1   -1       -1   -1  462.TIF   EASTWARD: N SIDE                
 1963  4  8   -1   -1   FS   -1   -1   BV   -1   -1       -1   -1  462.TIF   S SHORE                         

 1964  3 23   -1   -1   LI   -1   -1        -1   -1       -1   -1  469.TIF   SURROUNDING CHANNEL             

 1965  3 29   -1   -1   IP   -1   -1        -1   -1       -1   -1  478.TIF   BAY SHORES ON N SIDE OF ISLAND  

 1966  3 14   -1   -1   PI   -1   -1        -1   -1       -1   -1  485.TIF   TO LAKE ST. LOUIS               
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 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.