At midafternoon slow-motion rains moving with all the motivation of a cork in a pond were focusing on a narrow area near I-95 from Philadelphia into northern Delaware.
The rain was affiliated with a small area of low pressure over Delaware Bay, said Al Cope, the senior scientist at the National Weather Service in Mount Holly, and the rain has tended to train on that relatively tiny corridor.
Roadways are reported flooded throughout the area.
At 2:30 p.m. Peco is reporting about 1,500 customers were without power in parts of Philadelphia and Delaware County.
On its website, the FAA reported incoming flights to PHL were delayed about 90 minutes.
"We're watching it," said Cope. The weather service has a flash-flood warning until 4 p.m. in an arc extending from Wilmington to west-central Burlington County. "I don't think it's going to move a whole lot," Cope added
The weather service says that while they last, the rains could wring out as much as 2 inches an hour. It appears that at least a few creeks aren't going to be able to hold all the water.
The rains are expected to retreat southward later in the afternoon.