If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 PM EST THIS
EVENING...
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Portions of southwest Pennsylvania and northern West
Virginia.
* WHEN...Until 9 PM EST this evening.
* IMPACTS...Low visibility could make driving conditions hazardous.