BISMARCK, N.D. (AP) - Ice and snow caused problems for motorists and delayed schools in the Dakotas on Wednesday, and forecasters said a "significant" winter storm might follow in south central and southeast South Dakota this weekend.
The slick conditions prompted a 1 Â½-hour shutdown of a long stretch of Interstate 94 in southwestern North Dakota.
In South Dakota, black ice on Interstate 29 in the Beresford area caused numerous vehicles to slide in the ditch. One semitrailer crash blocked the northbound lanes for about 1 Â½ hours.
The National Weather Service issued winter weather advisories for a large portion of the states during the day.
The weather service said heavy snow and strong winds were possible in south central and southeast South Dakota Friday evening through Sunday morning.