Good evening. Iowa. I'm Aaron Jolly. That gray blanket outside your window? It's not going anywhere fast. We're sitting at 40 degrees under stubborn overcast skies, but the real trouble tonight is what you can't see. Fog is quietly settling in across the state. In the next 24 hours. Northern and eastern Iowa, take note. A Dense Fog Advisory kicks in at 10 P.M. For areas like Decorah and Charles City. Visibility could drop to a quarter mile or less. If you're driving late, you'll want to stick to those low beams. Central Iowa holds onto mostly cloudy skies tonight with a low around 36 degrees. You might catch a little drizzle toward morning. Wednesday starts with patchy fog before climbing to a high near 50. Eastern Iowa dips to 31 degrees overnight. Watch out — that's cold enough for any fog to create icy spots on untreated roads. The mist rolls ...