Flash Flood Warning Issued for Philadelphia and Delaware Counties
The National Weather Service in Mount Holly has issued a Flash Flood Warning for southeastern Pennsylvania, effective until 5:45 AM EDT on October 12.
At 2:38 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned region. Between 1 and 2 inches of rain have already fallen, with an expected rainfall rate of 1 to 2 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly.
The warning applies to East Central Delaware County and Southern Philadelphia County in southeastern Pennsylvania. Locations affected include Philadelphia, Yeadon, Folcroft, Swarthmore, East Lansdowne, South Philadelphia, Roxborough, Morris Park, Center City, Darby Township, Kensington, and Philadelphia International Airport.
Multiple major highways are within the affected zone. Impacted routes include Interstate 476 between mile markers 6 and 7, Interstate 76 between mile markers 340 and 351, Interstate 95 between mile markers 8 and 30, and Interstate 676 between mile markers 0 and 1.
The heavy rainfall is expected to cause flash flooding in small creeks and streams, urban areas, highways, streets, underpasses, as well as other low-lying and poor drainage areas.