12z GFS now has a surface low off the Jersey coast, which allows precip to fill in better. Looks like 0.5" QPF line bumps back from Delaware to the Harford/Cecil County line.
3:30 pm was when Mt. Holly would push their products. You always wanted to see the crawl on the lower third go "...WINTER STORM WARNING FOR THE GREATER DELAWARE VALLEY..." Pure magic.
Wild Guess: NWS just modified the winter weather advisory for DC and I-95 south. Wonder if they're going warnings for Carroll, NW Baltimore, and NW Harford?