Fog lowered visibility to less than half a mile in parts of southeastern Minnesota on Wednesday, January 11, the National Weather Service (NWS) said.Video posted to Twitter by user @Jonathan_dfg shows the thick fog hovering over Minneapolis on Wednesday.“Air quality is horrible,” Jonathan wrote on Twitter.The NWS warned travelers on Wednesday night to “take it slow and treat any wet looking surfaces as if they are icy.” Credit: @Jonathan_dfg via Storyful