* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. Portions of northern Indiana and southwest Michigan. * WHEN. Until 10 AM EDT /9 AM CDT/ Saturday. * IMPACTS. Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS. As skies clear, dense fog is developing quickly. Several observing stations are reporting visibility of one-quarter mile or less. At stations not reporting fog at this time, deteriorating conditions are expected.

The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect through Friday September 20. An Air Quality Action Day for Ozone has been issued. Ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Here are some recommended actions that the public can take: * Walk, bike, carpool or use public transportation. * Avoid using the drive-through and combine errands into one trip. * Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm. * Turn off your engine when idling for more than 30 seconds. * Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above. For additional information, please visit the IDEM Smog page at: https://apps.idem.in.gov/smogwatch