RAPID CITY, S.D. (KOTA) – Skies will be mostly cloudy tonight and fog will develop across the South Dakota plains. It could possibly reach Rapid City after midnight. A few showers will arrive after midnight, too. Temperatures will be near freezing for many, so be sure to use caution as some slippery spots may develop due to the fog or possible pockets of freezing drizzle. Best chance for this would be on the plains.