Twister destroys 6 homes in North Dakota
Storm system also produces lightning that kills teen in Wisconsin
ROLLA, N.D. - Residents say they were warned well before a tornado struck their small town, destroying six homes and damaging others.
Sheila Zinke said the sounding of the town's tornado siren Monday gave her and visiting relatives time to get to shelter.
"I was watching it from my basement, and I actually saw it come across the north section of town," Zinke said.
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