Dense Fog Advisory issued August 15 at 4:24AM CDT until August 15 at 9:00AM CDT by NWS

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... The National Weather Service in Sioux Falls has issued a Dense Fog Advisory, which is in effect until 9 AM CDT this morning. * VISIBILITY...Visibility of less than 1/4 mile can be expected early Tuesday morning. Thereafter, conditions are expected to improve as rain moves into the region.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2vEZY6a