The HP was actually strengthening as it was dropping south, too.
Christmas-eve-eve snow breaking out in DC Friday morning. Moderate to heavy snow Friday afternoon.
Yes, I’m doing PBP on a 280H+ run of the GFS OP.
ETA: NS vort dropping down from the plains creates a low in the Great Lakes. GFS eventually has a low in the gulf, low off the Jersey coast, and a low in the Great Lakes. A window to certainly keep an eye on.