MARSHALL — The Nation Weather Service has issued a dense fog advisory in effect until 10:00 this morning. Visibility is reduced significantly in southwest Minnesota, and central, east central, south central, and southeast South Dakota.

The low visibility could make driving conditions hazardous. Temperatures falling to near or below freezing may cause slick spots on untreated roads and surfaces.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.