Special Weather Statement issued July 22 at 4:38AM CDT by NWS Memphis
...PATCHY FOG THIS MORNING... Areas of patchy fog have developed over portions of the Mid-South. Expect the patchy fog will continue till after sunrise. Caution should be taken if driving into the patchy fog as some areas have visibilities below 1 mile.
A warning is issued when a hazardous weather or hydrologic event is occurring, imminent or likely.
A watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location or timing is still uncertain.
An advisory is issued when a hazardous weather or hydrologic event is occurring, imminent or likely.