A complex storm system wreaked havoc in parts of North Dakota, northern Minnesota and northern Wisconsin, with tornadoes, large hail and strong wind gusts, according to Brian Hurley, meteorologist with the National Weather Service’s Weather Prediction Center.

Three people are dead in North Dakota, and tens of thousands are without power in northern Minnesota and northwestern Wisconsin after powerful winds swept across the upper Midwest Friday and overnight Saturday.

The deaths came after a series of large and long-lasting storms moved through North Dakota and Minnesota Friday night.