A dense fog advisory is in effect for almost all of the state through the morning hours (Only Allamakee County in NE Iowa is excluded, but patchy dense fog is possible there as well) Visibilities are likely to be under a quarter mile through the morning hours. Make sure to use low beams if you need to venture out later this morning. With temperatures near or slightly above freezing, more snow is likely to melt over the coming days and more dense fog advisories are likely.