2017 recorded Ice-in as 12/11/17 @ 2 AM, 1 day earlier than average.

My 2018 Summer Ice-out calculations are figured as follows:

As of 2017, the average amount of elapsed days to ice-out after New Years Day is 109.409 days, which equates to an ice-out date of 4/20/18.

As of 2017, the average amount of ice days after the previous ice-in date is 129.818 days, which based on the ice-in date for 2017 (12/11/17) equates to an ice-out date of 4/19/18.

An absolute average of these dates would be 4/20/18 @ 4:43 AM. There is nothing scientific about this, it is merely numbers. When God decides on ice-out, it will happen, and the Cardinals will announce it via the Knottlane Sap Shack smoke. The Cardinals will then drink a shot of Sake in anticipation of the mosquitos to come!

Average Days of ice , as of 2016 129.818

Average Ice-out Date is: April 20

Average Days of water, as of 2017 235.509

Average Ice-in Date is: December 12 

aLf, predicts 2018 ICE-OUT on 4/20/18 @ 4:43 AM.

Ice dates are a consortium of Lake Lucerne Cardinals: Shirley Ratty, Meg, Andy, aLf - (Cardinal-Emeritus) and other Loons & Loonies.
In 2017, the Knottlane Cardinals were awarded the highly sought after Lake Lucerne loon pin of Excellence.