Great Lakes ice charts are produced off the daily Great Lakes ice analysis in cooperation with the U.S. National Ice Center (USNIC) and Canadian Ice Center. The charts are separated into eastern and western portion of the Great Lakes and available in color and black/white. USNIC also produces periodic ice charts for U.S. Coast Guard District 9 support broken into ice concentration, ice thickness/type, and a combination of both.
Daily ice chart that represents current ice conditions for western Great Lakes waters during their ice season. Ice coverage is detailed by total ice concentration, ice type with its concentration, and ice floe size, which are represented within the WMO egg code. Ice charts are presented in color and black / white GIFs.
Daily ice chart that represents current ice conditons for eastern Great Lakes waters during their ice season. Ice coverage is detailed by total ice concentration, ice type with its concentration, and ice floe size, which are represented within the WMO egg code. Ice charts are presented in color and black / white GIFs
Twice weekly (Tuesday and Thursday) ice charts that represents the current ice conditons for Great Lakes waters during their ice season. Ice coverage is detailed in 3 separate charts:
View Chart
ConcentrationDownload PNG
Concentration Thickness Combo Four Panel Archive