Dense Fog Advisory issued December 16 at 5:13AM CST until December 16 at 6:00AM CST by NWS Omaha/Valley NE

* WHAT…Visibility less than one mile in dense fog.

* WHERE…Montgomery, Pottawattamie, and Shelby Counties.

* WHEN…Until 6 AM CST early this morning.

* IMPACTS…Low visibility could make driving conditions hazardous.