Looks like this afternoon has the potential for some strong storms. As the clouds dissipate the heating of the day will only lead to more instability in the atmosphere. The models and data suggest a strong mid-level shear later in the afternoon. Storms should start later in the afternoon, ending just after dark tonight.
Potential exists for heavy rain, strong wind, and a good potential for tornadoes. Below is the wording from the National Weather Service regarding tornadoes. Those West, North and Northeast of Baltimore have the greatest risk for storms.
From the NWS:
"Forecast shear parameters from the RUC and GFS show decent tornado potential with 0-3km srh around 175 m2/s2 sweat indices approaching 400 and pressure falls around 4mb/3hr. LCLs also low with dewpoints in the 70s. All of these suggest a sig risk for tornadoes."