...Dense fog advisory in effect from 3 am to 9 am CDT Saturday...
The National Weather Service in St Louis has issued a dense fog advisory...which is in effect from 3 am to 9 am CDT Saturday.
* Timing...dense fog will develop overnight and persist into the early morning hours.
* Visibilities...one quarter mile or less at times.
* Impacts...rapid changes in visibility will cause hazardous driving conditions.
A dense fog advisory is issued when dense fog will substantially reduce visibilities...to one-quarter mile or less...resulting in hazardous driving conditions in some areas. Motorists are advised to use caution and slow down...as objects on and near roadways will be seen only at close range.