Towson and Baltimore City mesonet site have a NW wind, Martin Airport and Naval Academy has S or SE winds. There's definitely some boundary building up there and it's trying to form up into the I-83 corridor it seems.
Agreed. Was mentioning this earlier. You can see that on the Naval Academy, BWI, Ft. Meade and PG mesonet sites. Looks like it's running right along I-97.