Windstorm

Dec 16, 2021. At the peak, 663,693 customers were without power, most of them in Michigan, Wisconsin, Iowa.

Windstorm

Customers out at the peak 663,693 Dec 16, 2021, 9:00 AM

Customer-hours lost 14M Every customer out, times every hour out

Counties with 10%+ out 200 of 359 counties affected

Above 600,000 out nationally 4.0 hours Dec 16, 2021, 7:00 AM onward

States affected 32 MI · WI · IA · KS · MO

Hardest-hit county 100%out Roscommon, MI · 13,780 customers

Hour by hour

The country, in the dark

Customers without power across the US, two days either side. The shaded band is the time the national total stayed above 600,000.

By state

State	Peak out	Share	Counties 10%+
Michigan	262,022	10%	34
Wisconsin	225,744	9%	29
Iowa	178,444	14%	54
Kansas	110,885	13%	29
Missouri	72,602	13%	17
California	55,908	3%	2
Illinois	45,073	2%	6
Minnesota	36,197	7%	8
Colorado	27,485	7%	3
Florida	17,231	3%	1
New Jersey	12,426	5%	0
Nebraska	12,072	3%	3
Ohio	10,917	4%	1
Louisiana	7,574	6%	2
Texas	6,090	5%	3
Hawaii	5,488	6%	0
Indiana	5,428	3%	0
Rhode Island	4,615	2%	0
Georgia	4,195	2%	1
Virginia	3,392	2%	0

State peaks add each county's own peak, which may fall at different hours, so they can exceed the true simultaneous total.

By county