Rain Redux: Flood watch in effect
Heat wave almost toast, but more storms coming.
With the atmosphere about to become engorged with moisture, the National Weather Service has issued a flash-flood watch for the entire region from 6 p.m. Thursday to 7 p.m. Friday.
With a meandering front nearby, and the moisture potential "near record levels," the weather service says periods of heavy rain with localized flooding are possible.
The showers are expected to arrive Thursday night and continue into Friday, when the heat wave is forecast to break.
Precisely where the heaviest rain will fall and the strongest storms will occur is uncertain, but the government's Storm Prediction Center has placed an area just to the south of Philadelphia in the "slight risk" zone for severe weather.
On Monday, 1.68 inches of rain fell into the rain gauge at Philadelphia International Airport, and that was a record for the date.