With an impressive amount of heat and humidity available to work with, there will be several chances of severe weather in portions of the Mid Atlantic over the next 48 hours; so much so, the National Weather Service’s Storm Prediction Center’s Convective Outlook can be described as a “stormy double trouble” with two days of severe weather expected.
While there’s low-confidence in forecast minutia with where the storms will fire-up, there is high confidence they’ll fire up in the areas shaded in yellow on the Convective Outlook maps provided by the Storm Prediction Center. An area stretching from central Indiana to southern New Jersey is most likely to see the thunderstorm action, with Philadelphia, Baltimore, Wilmington, Norfolk, Richmond, and Washington, DC also in an area favorable for severe storms.
With a slow-moving boundary, midlevel flow oriented parallel to it, very high precipitable water values of 2″+, and potential for training/upwind propagation effects, locally excessive rainfall is possible. The National Weather Service says too much uncertainty exists for a flood watch at this time, especially given the relatively dry antecedent
conditions, but some local instances of poor-drainage/urban flooding are probable and isolated flash flooding
Remember: turn around, don’t drown! Never drive through flooded roadways.
The hot, humid, stormy conditions will persist for the next 48 hours, with no significant relief expected for a few more days.