Many Minnesota lakes are now setting latest ice out dates in large part to the coldest April we’ve seen in nearly 70 years. Our April finished 9.9° below the current 30 year average with a mean temperature of 37.6°. That ranks April 2018 as the 4th coldest on record in the Twin Cities, with records dating back to 1872. While Lake Bda Maka Ska (Calhoun) has declared ice out, Harriet is still not ice free, nor is Minnetonka. Harriet broke the record for latest on April 28th, but if Minnetonka can get past Saturday without declaring ice out, it will be the latest on record for that lake. But this is even more significant because the ice out record dates back before Minnesota was even a state, May 5th 1856… nearly 2 years before Minnesota was founded.
Amazingly, if our month had not finished as warm as it did, with temperatures finally getting into the 70s and 80s, it could have easily been the coldest on record.