A drenching rain will threaten much of the Mid-Atlantic into the weekend. It’s a relatively rare rainstorm for late July which may deliver up to six inches of rain over a period of 12 hours.
A flash flood watch has been issued through Saturday afternoon for the potential of life-threatening flooding. Heavy rain may result in rapid rises in streams and quick flooding of low lying and poor drainage areas.
The storm system will slowly move eastward over the area before redeveloping into a coastal storm off the New Jersey coast. Some major cities may experience up to 12 hours of steady rain late Friday.
Additionally, major airport hubs may face significant travel delays and motorist are urged to use caution when traveling.
Severe thunderstorms are expected along the southern side of the storm with damaging winds and large hail Friday afternoon.