Dense Fog Advisory

* WHAT...Dense fog will reduce visibility to 1/4 NM or less.

* WHERE...Two Harbors to Duluth MN and Duluth MN to Port Wing WI.

* WHEN...Until 10 AM CDT Thursday.

* IMPACTS...Low visibility will make navigation difficult.

* ADDITIONAL DETAILS...The poorest visibility is expected within 5 NM of the Twin Ports. Fog may become more widespread over the southwest arm of Lake Superior overnight. The advisory area may need to be expanded.