On the radio they are blaming it on windmills freezing up. They run here out on Lake Erie above the freezing spray and Lake Effect blizzards pretty reliably. Strange indeed.
This is how they're explaining that:
"How Will the Weekend Polar Vortex Affect Our Energy System?
Written by
Isaac Orr
in
Energy
on February 04, 2021
Print
Minnesotans are bracing for frigid temperatures this weekend, as some forecasts are estimating temperatures could reach -20
° F in the Twin Cities and -30
° F in Greater Minnesota on Sunday morning. The Polar Vortex of 2021 could be the biggest strain on Minnesota’s energy system in the last year, and it will be Minnesota’s coal, nuclear and natural gas fleet that will be the unsung heroes of the weekend.
The Forecast
The National Oceanic and Atmospheric Administration (NOAA) produced the image below detailing the likely temperatures Sunday morning. Temperatures will be below -22
° F in all parts of the state, and parts of North Dakota will see the mercury dip below -30
° F.
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Where is the Wind Energy?
During the Polar Vortex of 2019, we learned that wind turbines are shut down when temperatures are below -22
° F because it is too cold to operate them safely (see the figure below). This means it will be too cold for the wind turbines built by Xcel Energy, Minnesota Power, and Otter Tail Power in Minnesota and North Dakota to generate any electricity.
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In fact, the wind turbines will actually
consume electricity at these temperatures because the turbines use electric heaters in their gearboxes to keep the oil in the housing from freezing, which would cause damage to the turbine. During the 2019 Polar Vortex, it was reported that wind turbines were consuming 2 MW of electricity. This means wind turbines will be a liability on the grid when the power will be needed most."