Headline:
Flash Flood Warning issued August 5 at 9:30PM EDT until August 6 at 1:15AM EDT by NWS Mount Holly NJ
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
August 5, 2026 - 6:30pm
Expires:
August 5, 2026 - 10:15pm
Description:
At 930 PM EDT, the public reported thunderstorms producing heavy
rain across portions of the warned area. Roadway flooding has been
reported in the Phoenixville area. This heavy rain in a short period
of time is also moving across central Montgomery County. Between 0.5
and 1 inch of rain has fallen in portions of the warned area. The
expected rainfall rate is 1 to 2.5 inches in 1 hour. Flash flooding
is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public reported.
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, Norristown, Phoenixville, Lansdale, West Norriton,
East Norriton, Perkasie, Doylestown, Conshohocken, Hatboro,
Souderton and Ambler.
This includes the following highways...
Interstate 476 in Pennsylvania between mile markers 12 and 19.
Interstate 76 in Pennsylvania between mile markers 327 and 334.
Northeast Extension between mile markers 21 and 36.
Pennsylvania Turnpike between mile markers 317 and 344.
Instruction:
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Area Description:
Bucks, PA; Chester, PA; Delaware, PA; Montgomery, PA
Forcast Office:
NWS Mount Holly NJ
Sender:
w-nws.webmaster@noaa.gov