Fron the NWS Pittsburgh: 

The Winter Storm Warning and Winter Weather Advisories have both been expanded, with the Warning now in effect for eastern Monongalia/western Preston ridges, and the Advisory now in most of Monongalia and all of Marion. 

The other main change was to shorten the Winter Weather Advisory in time to 1 PM Friday, as it is now expected that most lowland precipitation will be rain by that time. 

See the attached graphic. 

Jeff, WB1AAL