Dense Fog Advisory issued August 14 at 3:52AM CDT until August 14 at 10:00AM CDT by NWS

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... The National Weather Service in Sioux Falls has issued a Dense Fog Advisory, which is in effect until 10 AM CDT this morning. * VISIBILITY...Visibility of less than 1/4 mile can be expected north of Interstate 90 through mid morning Monday morning. Thereafter, conditions are expected to improve.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2w2UCVo