Overview
- Storms that erupted Tuesday knocked out power to more than 65,000 customers across Pennsylvania, Delaware and New Jersey and produced reports of flash flooding, downed trees and wind gusts over 50 mph.
- The Storm Prediction Center has kept slight to marginal severe outlooks in place through Friday with the main threats being damaging wind gusts, large hail, heavy downpours and isolated tornadoes.
- The National Weather Service has issued heat advisories for parts of the region ahead of a hotter, more humid Thursday when heat‑index values may approach or exceed 100 degrees, raising the risk of heat‑related illness and prompting common precautions such as limiting strenuous outdoor activity and checking on vulnerable people.
- Forecasts remain uncertain on exact timing and placement because daytime heating, lake and ocean breezes, and outflow boundaries will control storm development, and forecasters say tropical moisture from systems like Edouard or Marie could increase weekend rain chances if it becomes entrained into the mid‑level flow.
- Most guidance trends toward high pressure and lower humidity for Labor Day weekend bringing generally drier, more comfortable conditions for many areas but firefighters and residents should note regional contrasts such as elevated fire weather in gusty, dry pockets around Billings and persistent coastal rip current risks.