SIOUX FALLS SD (KELO) -- Today is Thursday, Jan. 16. Here are this morning's top stories with KELOLAND On the Go. The Union County Sheriff's Office is looking for a teen who went missing this week. Addison Van Ballegooyen around 4 p.m. Monday at a city park in Hawarden, Iowa. Union County Sheriff looking for missing teen An employee shot a supervisor inside the Avantara nursing home in Milbank on Wednesday, Attorney General Marty Jackley said in a KELOLAND interview. UPDATE: Suspect in custody in Milbank shooting The polar plunge will be affecting much of the nation over the coming days. While this pattern is cold, it not a snowy forecast for most of our region. The best chance of light snow this weekend will be across the Black Hills. We expect temperatures to moderate starting Tuesday and Wednesday of next week. Mild temperatures today; Polar plunge this weekend