If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
* WHAT...Visibility of one quarter of a mile or less in dense fog.
* WHERE...Portions of east Tennessee and southwest Virginia.
* WHEN...Until 9 AM EDT Friday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Visibility could quickly drop to almost zero
statute miles in these conditions.