The ice on Spirit Lake went out this year on March 3.

From 1944, when the record-keeping began, through 1981, the ice went out in the latter half of April about once every third or fourth year.  Since 2001, the ice has gone out in the latter half of April only once.

Looking at it another way, the ice cover on Spirt Lake has been decreasing in terms of how long it lasts each year for the past quarter-century or so.

The obvious conclusion is that the water temperatures in the Iowa Great Lakes are getting warmer, a result of ongoing global warming, which is part . . .
Continue reading Warmer weather at Okoboji: What it means for the lakes and those who use them