Alertes en vigueurRapid City AFB, SD

What: Visibility one quarter to one half mile in dense fog.
Where: Portions of northwestern, south central, and southwestern South Dakota.
When: Until 6 AM MST /7 AM CST/ Thursday.
Impacts: Low visibility could make driving conditions hazardous. With temperatures below freezing, frost may form on roadways, especially on bridges.

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