Just in time for Earth Day, a very inconvenient chart of Great Lakes ice coverage – it’s 15X greater than normal for April
The chart above is from the Canadian Ice Service and shows the percentage ice coverage of the Great Lakes during the week of April 16 for each year from 1981 to 2014. Almost 40% of the Great Lakes are still currently covered with ice, which is far above the median of 2.7% for this time of year. Global what?
Update: The chart below shows the total accumulated ice coverage of the Great Lakes over the entire winter season from November to April for each winter season since 1980-1981. For the most recent winter the Great Lakes had ice coverage 42.4% of the time, which is more than twice the median ice coverage of 16.12% over the last 33 years.