* WHAT. Visibility down to a quarter of a mile in dense fog. * WHERE. Rush, Monroe, Brown, Bartholomew, Decatur, Lawrence, Jackson and Jennings Counties. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Hazardous driving conditions due to low visibility.

* WHAT. Visibility down to a quarter of a mile in dense fog. * WHERE. Rush, Monroe, Brown, Bartholomew, Decatur, Lawrence, Jackson and Jennings Counties. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Hazardous driving conditions due to low visibility.

* WHAT. Visibility less than one quarter mile or in dense fog. * WHERE. All of southern Indiana and central Kentucky. * WHEN. Until 10 AM EDT /9 AM CDT/ this morning. * IMPACTS. Hazardous driving conditions due to low visibility.

* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. Portions of east central and southeast Indiana, northeast and northern Kentucky and central, south central, southwest and west central Ohio. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Hazardous driving conditions due to low visibility.

Areas of fog will expand this morning and may be locally dense. Visibilities will likely be a quarter of a mile or less at times. If traveling, be alert for the low visibilities as well as rapid changes in visibility over very short distances. Slow down and leave plenty of space between yourself and other drivers. The fog is expected to mix out after sunrise with visibilities rapidly improving by mid morning.

Clearing skies, light winds, and recent rain will allow for fog to develop over the region tonight and last through early Saturday morning. In some areas, fog may become dense and significantly reduce visibilities. Motorists should use extra caution and be prepared for a sudden drop in visibility. Reduce speed and use low beam headlights in foggy areas.