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.

Extreme meteorologist and storm chaser Reed Timmer was at the scene of Friday’s tornado east of Jamestown. He and his crew tracked the tornado with the ‘Dominator’.