NOAA Great Lakes Environmental Research Laboratory: Great Lakes Maximum Annual Ice Cover 1973-2021
NOAA Great Lakes Environmental Research Laboratory: Great Lakes Ice Cover Comparison: January 11
NOAA Great Lakes Environmental Research Laboratory: MODIS Satellite image Great Lakes ice cover
NOAA Great Lakes Environmental Research Laboratory: Lake Michigan Ice, February 2021
NOAA Great Lakes Environmental Research Laboratory: Lake Michigan Ice, February 2021
NOAA Great Lakes Environmental Research Laboratory: Lake Ontario Average Ice Concentration (1973-2021)
NOAA Great Lakes Environmental Research Laboratory: Lake Erie Average Ice Concentration (1973-2021)
NOAA Great Lakes Environmental Research Laboratory: Lake Huron Average Ice Concentration (1973-2021)
NOAA Great Lakes Environmental Research Laboratory: Lake Michigan Average Ice Concentration (1973-2021)
NOAA Great Lakes Environmental Research Laboratory: Lake Superior Average Ice Concentration (1973-2021)
NOAA Great Lakes Environmental Research Laboratory: Maximum Annual Great Lakes Ice Cover, 1973-2020