Areas of locally dense fog will affect areas near the Duluth and Superior area, extending eastward along the shoreline through the Apostle Islands and Ashland WI. Visibilities of 1/2 to 1/4 mile have already been observed, which should persist for the next few hours. If traveling, please reduce your speed and use low- beam headlights when encountering foggy areas. A Dense Fog Advisory may be needed. Keep updated on the latest forecast for fog development trends.