Explanation of how the data is gathered:
Long Lake has some very deep spots that make exact dates for the lake freezing over difficult to calculate. The dates for ice-out in the spring are much easier. The original Ice-In and Ice-Out data was provided by the late Bella and John Sanders, whose home was near the mid-section of Long Lake. They collaborated with the late Bill Anderson who lived close to the deepest part of the lake toward the North end.
Long Lake has some very deep spots that make exact dates for the lake freezing over difficult to calculate. The dates for ice-out in the spring are much easier. The original Ice-In and Ice-Out data was provided by the late Bella and John Sanders, whose home was near the mid-section of Long Lake. They collaborated with the late Bill Anderson who lived close to the deepest part of the lake toward the North end.
It appears to be a very stable process for Long Lake. These control limits are calculated from the data and show that all the dates in the last twenty-two years are within normal variation.
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ICE OUT Data
According to Vern Campbell: The Ice Out system looks to be stable with no “abnormal” signals. Just as a reminder with the charts – the average Ice Out date is April 19 (1988-2021)…..however the date could range from March 20 – May 20…quite a wide spread. The Histogram above indicates that the distribution looks to be approximately normal or bell shaped.
Link: DNR Median Ice Out Data for the state of MN
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Ice In was declared on December 21, 2021
The charts indicate that the Ice In process is “stable” and it would appear to be normally distributed. The average Ice In is December 14 with variation from about November 20 – January 14. The “control Limits in the first chart indicate that 99.73 % of the time, you can expect the Ice to come in between November 12 and January 14 with the expectation that in a high percentage of the time (about 68%), the ice will come in between December 3 and December 25.