# Flash Flood Warning: Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/5ea3838f6a5f9bcc

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-08-17 00:46 ingested 2026-08-17 06:52

[original source ↗](http://www.weather.gov/)

## extract

Flash Flood Warning — Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA
Severity: Severe. Certainty: Likely.
At 1246 AM EDT, Doppler radar indicated heavy rain across the warned
area. Between 1.5 and 2.5 inches of rain have fallen. Additional
rainfall amounts up to 0.5 inches are possible in the warned area.
Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar.

IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.

Some locations that may experience flash flooding include...
Philadelphia, West Chester, Norristown, Phoenixville, West
Norriton, East Norriton, Coatesville, Westtown, Downingtown,
Conshohocken, Royersford and Narberth.

This includes the following highways...
Interstate 476 in Pennsylvania between mile markers 7 and 19.
Interstate 76 in Pennsylvania between mile markers 327 and 338.
Pennsylvania Turnpike between mile markers 305 and 333.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.