Flood — Allegheny, Pennsylvania

2004-09-17 to 2004-09-19 · Allegheny, Pennsylvania

Wider weather episode

At 124 PM EDT on 17th, road flooding was reported 2 miles west of Pittsburgh. At 2 PM, Wexford flooded. At 218 PM, roads flooded in Oakdale. By 315 PM, Springdale Boro flooded; and Wexford had 4.5" of rain. . By 450 PM on 17th, in Tarentum, Mill St and Davidson St were flooded; people evacuated. By 5 PM EDT on 17th, a state of emergency was declared in 62 of the 130 municipalities of Allegheny Co. South Park 6" of rain 530 PM EDT 17th. At 6 PM, evacuations in Tarentum. Widespread flooding stranded thousands. A total of 9494 homes, 1060 businesses, 4 schools, 9 fire depts, 50 public buildings damaged or destroyed. 140 boats broke away and ran away down several rivers. Some towns flooded, include: Bridgeville, Carnegie (by Chartiers Creek, starting 415 PM), Etna, Millvale, Sharpsburg, Shaler (by Little Pine Creek), South Fayette, Tarentum, West Deer. In Carnegie, 22 people were trapped on a bridge as flood waters rose and surrounded them. They tied themselves together and waited for rescue. These roads partly washed out: Oakdale Rd, Brocktown Rd, Boyds Run Rd, Dorrington Rd, Millers Run Rd, Noblestown Rd. Total rain: 6.6 inches Franklin Park, 6.4 Moon Twp. Pittsburgh International Airport set a new record for 1-day rainfall of 5.95 inches. This broke the old record (3.6") set during FRANCES on Sept 9. The Allegheny River flooded, from Freeport to Sharpsburg, from 11 PM EDT on 17th, until 5 AM EDT on 19th. Here are city, flood stage, crest, time: Freeport (flood stage 23 ft), 24.1 10 AM 18th; Natrona (21 ft), 24.2 11 AM 18th; Acmetonia (17), 19.8 1 PM 18th; Sharpsburg (21), 22.1 4 PM EDT 18th. The Ohio River flooded, from Pittsburgh to Dashields, from 10 PM on 17th, until 830 AM EDT on 19th. Pittsburgh (flood stage 25 ft), crested 31.0 at 4 PM EDT on 18th; Dashields (25 ft), crested 29.9 at 8 PM on 18th. On the Youghiogheny River, Sutersville rose above flood stage (20 ft) 1 PM on 18th, crested 20.7 at 430 PM, and fell below flood stage at 730 PM EDT on 18th. The remnants of Ivan made its closest approach to Pittsburgh at 7 PM EDT on the 17th. (IVAN)

Source: NOAA Storm Events Database, event_id 5422635. Narrative written by the NWS forecast office that issued the report.