MINNEAPOLIS (AP) - The National Weather Service has concluded that the deadly tornado that swept north Minneapolis was either a strong EF1 or an EF2.

The weather service says it was one tornado that struck the Twin Cities on Sunday. The tornado was on the ground for six-and-a-quarter miles in Hennepin County plus an additional eight miles across Anoka and Ramsey counties.

The weather service says some of the field information still needs to be processed. But the service says it's safe to say the twister will be rated as either a strong EF1 or possibly an EF2.

An EF1 tornado has speeds of up to 109 mph. An EF2 has speeds of 110-137 mph.

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