Several crashes and vehicles in the ditch were reported in eastern South Dakota early Monday.
Freezing rain is causing travel problems in parts of the Dakotas.
The National Weather Service early Monday issued advisories for freezing rain and wintry weather in eastern North Dakota, and northeastern and east central South Dakota. The rain was forecast to turn to snow later in the day, with heavy amounts possible in some areas.
Several crashes and vehicles in the ditch were reported in eastern South Dakota early Monday. KELO-TV reports that the Sioux Falls airport canceled some early flights.
Slick roads also were a problem in the two states over the weekend. The Dickinson Press reports there were several crashes on Interstate 94 in southwestern North Dakota on Saturday, including a semi-tanker rollover. Authorities responded to numerous crashes in eastern South Dakota on Sunday, including a semitrailer rollover.