|Source: Clites et al. (2014)|
- Lake Superior wasn't completely ice free until June 6th. Yeah, June!
- At the end of April, 51% of Lake Superior, 23% of Lake Huron, and 10% of Lake Michigan were still ice covered.
- In the 40-year period of record at the end of April, the previous record on Lake Superior was 30%, in only a few years was significant ice observed on Lake Huron, and at no time was their significant ice on Lake Michigan.
A quick look at data from NCDC shows that this past Dec–Apr was the coldest in Michigan (which flanks Lakes Superior, Michigan and Huron) since 1920 and the 4th coldest on record. The period is a dramatic outlier during the 40-year period of good ice-cover records.
During the same period, globally averaged temperatures were the 6th warmest on record, illustrating that Mother Nature can still bring it, but only regionally.