* WHAT. Dense fog will reduce visibility to a quarter mile or less. * WHERE. Winthrop Harbor to Northerly Island IL. * WHEN. Until 4 AM CDT Saturday. * IMPACTS. Low visibility will make navigation difficult.

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for Ozone on Saturday, May 18, from noon until 11 p.m. This advisory affects people living in the following counties: Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Walworth, Washington, and Waukesha. Due to ozone conducive weather conditions including a lake breeze, the air quality index is expected to reach the UNHEALTHY FOR SENSITIVE GROUPS (USG) level. People with lung disease (such as asthma), children, older adults, and people who are active outdoors (including outdoor workers) should reduce prolonged or heavy outdoor exertion. For more information on current air quality, please see: https://airquality.wi.gov

An Air Quality Action Day has been forecast for Northwest Indiana for elevated ozone levels and is from midnight tonight to midnight CDT Saturday night. Ozone Levels are expected to be at unhealthy levels for sensitive groups. For additional information. please visit the IDEM SMOG Watch web site at www.SmogWatch.IN.gov or the EPA AIRNOW web site at www.airnow.gov and click on Indiana.