Missoula, MT : Superior woman killed in rollover accident on I-90 in Mineral County on Tuesday, December 29, 2015

Authorities say one woman has died after her vehicle rolled on Interstate 90 west of Tarkio in Mineral County.

The Missoulian reports that 67-year-old Ardella Hower, of Superior, had been heading east in the passing lane Tuesday when she crossed the median and her vehicle rolled over. Sheriff Tom Bauer says slush and ice on the highway may have caused her to lose control of her vehicle.

Hower, the only occupant in the vehicle, was taken to a hospital and later pronounced dead.

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Superior woman dies in rollover crash on Interstate 90