When various conditions are met for Smart Forecast the icon on my Broadcast doesn't change until I bring up SETTINGS/SMART FORECAST.
ICON SETTINGS is set to METAR STATION and SMART FORECAST OVERIDE.
ie This morning the cloud base is < 600' and humidity > 95%. Theses conditions should trigger fog, but the icon shows mostly sunny. Upon opening the Smart Forecast window, the icon changes to fog.