The timing seems right. At 6:30 looking at animated wind vector maps it looks like the general wind shift area is just west of a Harrisburg-Frederick-Leesburg-Luray line.
I seem to say that a lot this year, despite their winning record. With a little consistency and with the ability to put together 4 consecutive decent quarters, they could almost be undefeated this year.
Lots of stats here/below altho it may not include specific answers to your question.
http://www.newx-forecasts.com
A fun contest to forecast against yourself and others. If anyone recalls the “Joseph Bartlo days” on the 1990’s ne.weather Usenet bulletin boards, this is where some of us landed. Includes enough stats to make your head explode.