ALLEN COUNTY, Ind. (WOWO): A Dense Fog Advisory is in effect for all of northern Indiana. The advisory will remain in effect until 7 a.m., Tuesday, according to the National Weather Service.

A Dense Fog Advisory means visibilities will frequently be reduced to less than one quarter mile. If driving, be sure to slow down and leave plenty of distance ahead of you.

Meanwhile, conditions are expected to improve by daybreak.