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Ice cover takes deep dip on Great Lakes

Feb 22, 2020 07:34AM ● By Editor
Satellite imagery of ice cover on the Great Lakes, February 20, 2020. Photo: NOAA

From the Detroit News - February 21, 2020

Icy, snow-covered lakes are a normal part of Midwest winters, but Great Lakes ice cover is taking a big dip this year in Michigan and other states, weather experts say.

The National Oceanic and Atmospheric Administration's Great Lakes Environmental Research Laboratory found that as of Thursday, the Great Lakes ice cover was 17.6%

Satellite imagery of ice cover on the Great Lakes February 20 2020

Satellite imagery of ice cover on the Great Lakes, February 20, 2020.   (Photo: NOAA)

Last year at this time, the ice cover hovered around 67%, according to the National Weather Service in Duluth, Minnesota.

In the winter of 2019, Michigan experienced a record-low temperature of minus-14 in late January. But this winter has seen warmer-than-usual temperatures that are in line with the advance forecasts for normal or slightly-warmer-than-usual temperatures. 

Even last week, on Valentine's Day, the figure was closer to 17%, with water widely visible; typically around Feb. 14, Great Lakes ice cover, on average, is 41%, NASA's Earth Observatory said.

February 20th 2020 vs 2019 ice cover. About 16% ice cover today compared to 66% at this time last year in the depths of a prolonged cold outbreak. @NOAA_GLERL

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Why the change? Jia Wang, an ice climatologist at NOAA’s Great Lakes Environmental Research Laboratory, attributed it to warmer air temperatures this season, according to Earth Observatory.

While Metro Detroit has had seasonable conditions this week, that's set to change in the coming days. After topping out in the 30s on Friday, the mercury is forecast to climb into the 40s Saturday and near 50 on Sunday, the National Weather Service said. 

Dry conditions with below normal temperatures continue today and tonight before a warming trend begins this weekend.

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But the lower ice coverage is not unusual. Since 1995, the Great Lakes have four times hit low averages for the entire winter of 14.3% in 1998, 11.9% in 2002, 12.9% in 2012 and 19.4% as recently as three years ago, according to NOAA statistics.

During the same 25-year period, there were great ice cover spikes. They have ranged from 80.3% in 2003 to a record 92.5% in 2014, nearly 89% in 2015 as well as about 81% last year. 

To read the original article and see related reporting, follow this link to the Detroit News website.

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