Special Weather Statement issued September 18 at 8:46AM CDT by NWS
Effective: 1 p.m. on Tuesday, Sept. 19, 2017
Expires: 10 a.m. on Monday, Sept. 18, 2017

Through 830 am MDT (930 am CDT)...the fog will continue to lift.
However, until that happens a few locations will have visibilities
of a half mile or less. Area motorists need to be prepared for
rapidly changing visibilities.

See more at NOAA