After a relative "break" in the thunderstorm activity around the region today, with mere scattered storms as opposed to more widespread thunder, thunderstorms will increase in coverage over the next couple of afternoons as disturbances travel around the upper trough in the Great Lakes and push into the Bermuda High that's sitting out in the Atlantic. An increasing plume of moisture will push north up the East Coast and the weak frontal boundary that's lurking along the coast will act as a trigger for thunderstorm activity across the region.
Evening storms will diminish this evening, leaving a variably cloudy sky around through the night. There could be a shower or two lurking around overnight but odds favor a generally dry but humid overnight with lows in the upper half of the 60's or low 70's.
Answering the question often asked -- "When the hell does this end?" Well, the thunder threat begins to diminish in coverage after Tuesday, with odds favoring pop up or widely scattered storms for the 4th and the following weekend. The Bermuda High will win out and build west just enough to allow for temperatures to nudge back towards or above 90 for the end of the week, perhaps as soon as the 4th.