Probably doesn’t need to be said, but a tropical system that stays strong until New England has to be booking it (1938) or strongly interact with a trough (Sandy). Both the Euro and GFS slow the system upon approach.
Seems to be that the parameters look good from central PA down to northern VA, but the models are consistently putting the mini supercells (as indicated by UH) mostly in PA. So it’ll be interesting to see whether the explicit simulations win out or not.
The good part about last night was that areas around IAD finally got into the action.
One notable thing about today, after a stagnant summer, is that the clouds are really moving. Gives the sky a different look.
CoCoRahs requires a particular rain gauge, you aren't supposed to use any of the tipping bucket or other automated gauges. https://www.cocorahs.org/Content.aspx?page=store